nvmesh.py

#!/usr/bin/env python
# coding=utf-8
#
# Copyright (c) 2018 Excelero, Inc. All rights reserved.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Author:        Andreas Krause
# Maintainer:    Andreas Krause
# Email:         andreas@excelero.com


import logging
from cmd2 import Cmd, with_argparser, with_category
import argparse
import json
import gnureadline as readline
import atexit
import sys
import os
import getpass
import paramiko
import base64
from humanfriendly.tables import format_smart_table
import humanfriendly
import time
import urllib3
from multiprocessing import Pool
import dateutil.parser
import re
import requests

__version__ = '53'

RAID_LEVELS = {
    'lvm': 'LVM/JBOD',
    '0': 'Striped RAID-0',
    '1': 'Mirrored RAID-1',
    '10': 'Striped & Mirrored RAID-10',
    'ec': 'Erasure Coding',
    'con': 'Concatenated'
}

NVME_VENDORS = {
    '0x1344': 'Micron',
    '0x15b7': 'SanDisk',
    '0x1179': 'Toshiba',
    '0x144d': 'Samsung',
    '0x1bb1': 'Seagate'
}

PROTECTION_LEVELS = {
    2: 'Full Separation',
    1: 'Minimal Separation',
    0: 'Ignore Separation'
}

FORMAT_TYPES = {
    'ec': 'format_ec',
    'legacy': 'format_raid'
}

WARNINGS = {
    'delete_volume': 'This operation will DESTROY ALL DATA on the volume selected and is IRREVERSIBLE.\nDo you want to continue? [Yes|No]: ',
    'format_drive': 'This operation will DESTROY ALL DATA on the drives and is IRREVERSIBLE.\nDo you want to continue? [Yes|No]: ',
    'force_detach_volume': 'This operation will immediately HALT ALL I/O and will impact any running applications expecting it to be available. It is recommended that all applications and/or file systems using this volume be stopped/un-mounted prior to issuing the command.\nDo you want to continue? [Yes|No]: ',
    'stop_nvmesh_client': 'This operation will HALT ALL I/O TO ALL VOLUMES in use by THE SELECTED CLIENT. It is recommended that all applications and/or file systems supported by NVMesh volumes on the clients be stopped/un-mounted prior to issuing the command.\nDo you want to continue? [Yes|No]: ',
    'stop_nvmesh_target': 'This operation will make any UNPROTECTED VOLUMES supported by drives in the selected targets IMMEDIATELY UNAVAILABLE. Any PROTECTED VOLUMES will become IMMEDIATELY DEGRADED until services are restarted or volumes are rebuilt to alternate drives in another target.\nDo you want to continue? [Yes|No]: ',
    'stop_nvmesh_manager': 'This operation will halt the running instance of NVMesh Management on the selected servers. If Management is deployed as a stand-alone instance, or this is the last running HA instance, further changes to NVMesh cluster volumes, clients, and targets will be unavailable until Management is restarted on at least one node.\nDo you want to continue? [Yes|No]: ',
    'stop_cluster': 'ALL NVMesh resources will become UNAVAILABLE and ALL IO will stop. It is recommended that all applications and/or file systems using any resource out of this cluster be stopped/un-mounted prior to issuing the command.\nDo you want to continue? [Yes|No]: ',
    'evict_drive': 'This operation will make any UNPROTECTED VOLUMES supported by this drive IMMEDIATELY UNAVAILABLE. Any PROTECTED VOLUMES will become IMMEDIATELY DEGRADED.\nDo you want to continue? [Yes|No]: '
}

__license__ = r"""GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble:
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The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.

END OF TERMS AND CONDITIONS"""

logging.basicConfig(filename=os.path.expanduser('~/.nvmeshcli.log'),
                    format="%(asctime)s - %(levelname)-8s - %(message)s",
                    level=logging.DEBUG)


class ArgsUsageOutputFormatter(argparse.HelpFormatter):
    def _format_usage(self, usage, actions, groups, prefix):
        if prefix is None:
            prefix = 'Usage: '
        if usage is not None:
            usage = usage % dict(prog=self._prog)
        elif usage is None and not actions:
            usage = '%(prog)s' % dict(prog=self._prog)
        elif usage is None:
            prog = '%(prog)s' % dict(prog=self._prog)
            action_usage = self._format_actions_usage(actions, groups)
            usage = ' '.join([s for s in [prog, action_usage] if s])
        return '%s%s\n\n' % (prefix, usage)


class OutputFormatter:
    def __init__(self):
        self.text = None

    @staticmethod
    def print_green(text):
        print('\033[92m' + text + '\033[0m')

    @staticmethod
    def print_yellow(text):
        print('\033[33m' + text + '\033[0m')

    @staticmethod
    def print_red(text):
        print('\033[31m' + text + '\033[0m')

    @staticmethod
    def green(text):
        return '\033[92m' + text + '\033[0m'

    @staticmethod
    def yellow(text):
        return '\033[33m' + text + '\033[0m'

    @staticmethod
    def red(text):
        return '\033[31m' + text + '\033[0m'

    @staticmethod
    def bold(text):
        return '\033[1m' + text + '\033[0m'

    @staticmethod
    def bold_underline(text):
        return '\033[1m\033[4m' + text + '\033[0m'

    @staticmethod
    def echo(host, text):
        print("[ " + host.strip() + " ]\t.\t.\t." + text)
        return

    @staticmethod
    def print_tsv(content):
        output = []
        for line in content:
            output_line = "\t".join(str(item) for item in line)
            output.append(output_line)
        return "\n".join(output)

    @staticmethod
    def print_json(content):
        return json.dumps(content, indent=2)

    @staticmethod
    def add_line_prefix(prefix, text, short):
        if short:
            text_lines = [' '.join([prefix.split('.')[0], line]) for line in text.splitlines()]
        else:
            text_lines = [' '.join([prefix, line]) for line in text.splitlines()]
        return '\n'.join(text_lines)


class Hosts:
    def __init__(self):
        self.host_list = []
        self.host_file = os.path.expanduser('~/.nvmesh_hosts')
        self.test_host_connection_test_result = None
        self.formatter = OutputFormatter()
        self.host_delete_list = []

    def manage_hosts(self, action, hosts_list, silent):
        if action == "add":
            open(self.host_file, 'a').write(('\n'.join(hosts_list) + '\n'))
        elif action == "get":
            if os.path.isfile(self.host_file):
                output = []
                self.host_list = open(self.host_file, 'r').readlines()
                for host in self.host_list:
                    output.append(host.strip())
                return output
            else:
                if silent:
                    return None
                else:
                    return [self.formatter.yellow(
                        "No hosts defined! Use 'add hosts' to add hosts to your shell environment.")]
        elif action == "delete":
            tmp_host_list = []
            if os.path.isfile(self.host_file):
                for line in open(self.host_file, 'r').readlines():
                    tmp_host_list.append(line.strip())
                for host in hosts_list:
                    tmp_host_list.remove(host.strip())
                open(self.host_file, 'w').write(('\n'.join(tmp_host_list) + '\n'))
            else:
                return [self.formatter.yellow(
                    "No hosts defined! Use 'add hosts' to add hosts to your shell environment.")]


class ManagementServer:
    def __init__(self):
        self.server = None
        self.server_list = []
        self.server_file = os.path.expanduser('~/.nvmesh_manager')

    def get_management_server_list(self):
        if os.path.isfile(self.server_file):
            self.server = [server.strip() for server in open(self.server_file, 'r').readlines()]
            return sorted(self.server)
        else:
            formatter.print_yellow("No API management server defined yet!")
            server_list = raw_input(
                "Provide a space separated list, min. one, of the NVMesh manager server names: ").split(" ")
            self.save_management_server(server_list)
            return sorted(server_list)

    def save_management_server(self, server_list):
        open(self.server_file, 'w').write("\n".join(server_list))
        return


class UserCredentials:
    def __init__(self):
        self.SSH_user_name = None
        self.SSH_password = None
        self.API_user_name = None
        self.API_password = None
        self.SSH_sudo = None
        self.SSH_secrets_file = os.path.expanduser('~/.nvmesh_shell_secrets')
        self.API_secrets_file = os.path.expanduser('~/.nvmesh_api_secrets')
        self.SSH_sudo_file = os.path.expanduser('~/.nvmesh_shell_sudo')
        self.SSH_secrets = None
        self.API_secrets = None

    def save_ssh_user(self):
        if self.SSH_user_name is None or self.SSH_password is None:
            formatter.print_red('Cannot store SSH user credentials! '
                                'Both, user name and password need to be set/defined!')
        else:
            secrets = open(self.SSH_secrets_file, 'w')
            secrets.write(' '.join([self.SSH_user_name, base64.b64encode(self.SSH_password)]))
            secrets.close()

    def save_api_user(self):
        if self.API_user_name is None or self.API_password is None:
            formatter.print_red('Cannot store API user credentials! '
                                'Both, user name and password need to be set/defined!')
        else:
            secrets = open(self.API_secrets_file, 'w')
            secrets.write(' '.join([self.API_user_name, base64.b64encode(self.API_password)]))
            secrets.close()

    def save_ssh_sudo(self, is_sudo):
        sudo = open(self.SSH_sudo_file, 'w')
        sudo.write(str(is_sudo))
        sudo.close()

    def get_ssh_user(self):
        try:
            self.SSH_secrets = open(self.SSH_secrets_file, 'r').read().split(' ')
            self.SSH_sudo = open(self.SSH_sudo_file, 'r').read().strip()
        except Exception, e:
            logging.critical(e.message)
            formatter.print_red(e.message)
            pass
        if self.SSH_secrets is None:
            formatter.print_yellow("SSH user credentials not set yet!")
            self.SSH_user_name = raw_input("Provide the root level SSH user name: ")
            self.SSH_password = getpass.getpass("Please provide the SSH password: ")
            self.save_ssh_user()
            self.get_ssh_user()
            return self.SSH_user_name
        else:
            self.SSH_user_name = self.SSH_secrets[0]
            self.SSH_password = base64.b64decode(self.SSH_secrets[1])
            return self.SSH_user_name, self.SSH_password

    def get_api_user(self):
        try:
            self.API_secrets = open(self.API_secrets_file, 'r').read().split(' ')
        except Exception, e:
            logging.critical(e.message)
            formatter.print_red(e.message)
            pass
        if self.API_secrets is None:
            formatter.print_yellow("API user credentials not set yet!")
            self.API_user_name = raw_input("Provide the root level API user name: ")
            self.API_password = getpass.getpass("Please provide the API password: ")
            self.save_api_user()
            self.get_api_user()
            return self.API_user_name
        else:
            self.API_user_name = self.API_secrets[0]
            self.API_password = base64.b64decode(self.API_secrets[1])
            return self.API_user_name


class SSHRemoteOperations:
    def __init__(self):
        self.remote_path = "/tmp/nvmesh_diag/"
        self.local_path = os.path.abspath("nvmesh_diag/")
        self.formatter = OutputFormatter
        self.file_list = []
        self.ssh_port = 22
        self.ssh = paramiko.SSHClient()
        self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        self.sftp = self.ssh.open_sftp
        self.remote_return_code = None
        self.remote_stdout = None
        self.remote_command_return = None
        self.remote_command_error = None
        self.ssh_user_name = user.get_ssh_user()[0]
        self.ssh_password = user.get_ssh_user()[1]

    def test_ssh_connection(self, host_list):
        if host_list is None:
            host_list = Hosts().manage_hosts('get', None, True)
        if host_list is None:
            host_list = get_client_list(False)
            host_list.extend(get_target_list(short=True))
            host_list.extend(get_manager_list(short=True))
            host_list = set(host_list)
        for host in host_list:
            try:
                self.ssh.connect(
                    host, username=user.SSH_user_name, password=user.SSH_password, timeout=5, port=self.ssh_port)
                self.ssh.close()
                print(" ".join(['Connection to %s' % host, formatter.green('OK')]))
            except Exception, e:
                print(" ".join(['Connection to %s' % host, formatter.red('Failed:'), e.message]))
                self.ssh.close()
        return

    def transfer_files(self, host, list_of_files):
        try:
            self.ssh.connect(
                host, username=user.SSH_user_name, password=user.SSH_password, timeout=5, port=self.ssh_port)
            self.sftp = self.ssh.open_sftp()
            try:
                self.sftp.chdir(self.remote_path)
            except IOError:
                self.sftp.mkdir(self.remote_path)
            for file_to_transfer in list_of_files:
                self.sftp.put(self.local_path + "/" + file_to_transfer, self.remote_path + "/" + file_to_transfer)
            self.sftp.close()
            self.ssh.close()
            return formatter.green("File transfer to host %s OK" % host)
        except Exception, e:
            cli_exit.error = True
            return formatter.red("File transfer to %s Failed! " % host + e.message)

    def return_remote_command_std_output(self, host, remote_command):
        try:
            self.ssh.connect(host, username=self.ssh_user_name, password=self.ssh_password, timeout=5,
                             port=self.ssh_port)
            if user.SSH_sudo.lower() == 'true':
                remote_command = " ".join(["sudo -S -p ''", remote_command])
            stdin, stdout, stderr = self.ssh.exec_command(remote_command)
            if user.SSH_sudo.lower() == 'true':
                stdin.write(user.SSH_password + "\n")
                stdin.flush()
            self.remote_command_return = stdout.channel.recv_exit_status(), stdout.read().strip(), stderr.read().strip()
            if self.remote_command_return[0] == 0:
                return self.remote_command_return[0], self.remote_command_return[1]
            elif self.remote_command_return[0] == 3:
                cli_exit.error = True
                return "Service not running."
            elif self.remote_command_return[0] == 127:
                cli_exit.error = True
                return self.remote_command_return[0], remote_command + " not found or not installed!"
            else:
                cli_exit.error = True
                return self.remote_command_return[0], " ".join([remote_command, self.remote_command_return[1]])
        except Exception, e:
            cli_exit.error = True
            logging.critical(e.message)
            print formatter.red("Couldn't execute command %s on %s! %s" % (remote_command, host, e.message))

    def execute_remote_command(self, host, remote_command):
        try:
            self.ssh.connect(host.strip(), username=user.SSH_user_name, password=user.SSH_password, timeout=5,
                             port=self.ssh_port)
            if user.SSH_sudo:
                remote_command = " ".join(["sudo -S -p ''", remote_command])
            stdin, stdout, stderr = self.ssh.exec_command(remote_command)
            if user.SSH_sudo:
                stdin.write(user.SSH_password + "\n")
                stdin.flush()
            return stdout.channel.recv_exit_status(), "Success - OK"
        except Exception, e:
            logging.critical(e.message)
            cli_exit.error = True
            print formatter.print_red("Couldn't execute command %s on %s!" % (remote_command, host))
            return

    def check_if_service_is_running(self, host, service):
        try:
            cmd_output = self.execute_remote_command(host, "/opt/NVMesh/%s/services/%s status" % (service, service))
            if cmd_output[0] == 0:
                return True
            elif cmd_output[0] == 3:
                cli_exit.error = True
                return False
            else:
                cli_exit.error = True
                return None
        except Exception, e:
            cli_exit.error = True
            print formatter.print_red("Couldn't verify service %s on %s !" % (service, host) + e.message)


class Api:
    def __init__(self):
        self.protocol = 'https'
        self.server = None
        self.port = '4000'
        self.user_name = None
        self.password = None
        self.endpoint = None
        self.payload = None
        self.session = requests.session()
        self.response = None
        self.session.verify = False
        self.err = None
        self.action = None
        self.timeout = 10

    def execute_api_call(self):
        try:
            if self.action == "post":
                logging.debug(
                    "API action: POST %s://%s:%s%s" % (self.protocol, self.server, self.port, self.endpoint))
                logging.debug("API payload: %s" % self.payload if '/login' not in self.endpoint else 'login')
                if self.payload:
                    self.response = self.session.post(
                        '%s://%s:%s%s' % (self.protocol, self.server, self.port, self.endpoint), json=self.payload,
                        timeout=self.timeout, verify=False)
                else:
                    self.response = self.session.post(
                        '%s://%s:%s%s' % (self.protocol, self.server, self.port, self.endpoint), timeout=self.timeout)
                    logging.debug("API response: %s" % self.response)
                    logging.debug("API response content is: %s"
                                  % self.response.content if '/login' not in self.endpoint else 'login')
                return self.response.content
            elif self.action == "get":
                logging.debug("API action: GET %s://%s:%s%s" % (self.protocol, self.server, self.port, self.endpoint))
                self.response = self.session.get(
                    "%s://%s:%s%s" % (self.protocol, self.server, self.port, self.endpoint), timeout=self.timeout,
                    verify=False)
                logging.debug("API response status code: %s" % self.response)
                logging.debug("API response content is: %s" % self.response.content)
                return self.response.content
        except Exception, e:
            cli_exit.error = True
            logging.critical(e.message)
            print(formatter.red("Error: " + e.message))

    def login(self):
        urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
        self.action = "post"
        self.endpoint = '/login'
        self.payload = {
            "username": self.user_name,
            "password": self.password
        }
        return self.execute_api_call()

    def get_cluster(self):
        self.endpoint = '/status'
        self.action = "get"
        return self.execute_api_call()

    def get_space_allocation(self):
        self.endpoint = '/getSpaceAllocation'
        self.action = "get"
        return self.execute_api_call()

    def get_servers(self):
        self.endpoint = '/servers/all/%s/%s' % (0, 0)
        self.action = "get"
        return self.execute_api_call()

    def get_clients(self):
        self.endpoint = '/clients/all/%s/%s' % (0, 0)
        self.action = "get"
        return self.execute_api_call()

    def get_volumes(self):
        self.endpoint = '/volumes/all/%s/%s' % (0, 0)
        self.action = "get"
        return self.execute_api_call()

    def get_volume(self, volume_id):
        self.endpoint = '/volumes/all/%s/%s?filter={"_id":"%s"}&sort={}' % (0, 0, volume_id)
        self.action = "get"
        return self.execute_api_call()

    def get_cluster_status(self):
        self.endpoint = '/status'
        self.action = "get"
        return self.execute_api_call()

    def get_logs(self, all_logs):
        if all_logs:
            self.endpoint = '/logs/all/0/0?filter={}&sort={"timestamp":-1}'
        else:
            self.endpoint = '/logs/alerts/0/0?filter={}&sort={"timestamp":-1}'
        self.action = "get"
        return self.execute_api_call()

    def get_vpgs(self):
        self.endpoint = '/volumeProvisioningGroups/all'
        self.action = "get"
        return self.execute_api_call()

    def get_disk_classes(self):
        self.endpoint = '/diskClasses/all'
        self.action = "get"
        return self.execute_api_call()

    def get_drive_class(self, name):
        self.endpoint = '/diskClasses/all?filter={"_id": "%s"}&sort={}' % name
        self.action = "get"
        return self.execute_api_call()

    def update_drive_class(self, payload):
        self.endpoint = '/diskClasses/update'
        self.action = "post"
        self.payload = payload
        return self.execute_api_call()

    def get_disk_models(self):
        self.endpoint = '/disks/models'
        self.action = "get"
        return self.execute_api_call()

    def get_disk_by_model(self, model):
        self.endpoint = '/disks/disksByModel/%s' % model
        self.action = "get"
        return self.execute_api_call()

    def get_target_classes(self):
        self.endpoint = '/serverClasses/all'
        self.action = "get"
        return self.execute_api_call()

    def get_target_class(self, name):
        self.endpoint = '/serverClasses/all?filter={"_id": "%s"}&sort={}' % name
        self.action = "get"
        return self.execute_api_call()

    def update_target_class(self, payload):
        self.endpoint = '/serverClasses/update'
        self.action = "post"
        self.payload = payload
        return self.execute_api_call()

    def get_server_by_id(self, server):
        self.endpoint = '/servers/api/%s' % server
        self.action = "get"
        return self.execute_api_call()

    def target_cluster_shutdown(self, payload):
        self.endpoint = '/servers/setBatchControlJobs'
        self.action = "post"
        self.payload = payload
        return self.execute_api_call()

    def manage_volume(self, payload):
        self.payload = payload
        self.endpoint = '/volumes/save'
        self.action = "post"
        return self.execute_api_call()

    def manage_vpg(self, action, payload):
        self.payload = payload
        self.action = "post"
        if action == 'save':
            self.endpoint = '/volumeProvisioningGroups/save'
        elif action == 'delete':
            self.endpoint = '/volumeProvisioningGroups/delete'
        return self.execute_api_call()

    def set_control_jobs(self, payload):
        self.payload = payload
        self.endpoint = '/clients/setControlJobs'
        self.action = "post"
        return self.execute_api_call()

    def manage_drive_class(self, action, payload):
        self.payload = payload
        self.endpoint = '/diskClasses/%s' % action
        self.action = "post"
        return self.execute_api_call()

    def manage_target_class(self, action, payload):
        self.payload = payload
        self.endpoint = '/serverClasses/%s' % action
        self.action = "post"
        return self.execute_api_call()

    def get_managers(self):
        self.endpoint = '/managementCluster/all/0/0'
        self.action = 'get'
        return self.execute_api_call()

    def evict_drive(self, payload):
        self.payload = payload
        self.endpoint = '/disks/evictDiskByDiskIds'
        self.action = 'post'
        return self.execute_api_call()

    def delete_drive(self, payload):
        self.payload = payload
        self.endpoint = '/disks/delete'
        self.action = 'post'
        return self.execute_api_call()

    def delete_nic(self, payload):
        self.payload = payload
        self.endpoint = '/servers/deleteNIC'
        self.action = 'post'
        return self.execute_api_call()

    def format_drive(self, payload):
        self.payload = payload
        self.endpoint = '/disks/formatDiskByDiskIds'
        self.action = 'post'
        return self.execute_api_call()


class Exit:
    def __init__(self):
        self.error = None
        self.is_interactive = None

    def validate_exit(self):
        if self.is_interactive is False:
            if self.error:
                sys.exit(1)


formatter = OutputFormatter()
user = UserCredentials()
nvmesh = Api()
mgmt = ManagementServer()
hosts = Hosts()
cli_exit = Exit()


class NvmeshShell(Cmd):

    def __init__(self):
        Cmd.__init__(self, use_ipython=True)
        self.hidden_commands = ['py', 'ipy', 'pyscript', '_relative_load', 'eof', 'eos', 'exit']

    prompt = "\033[1;34mnvmesh #\033[0m "
    show_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    show_parser.add_argument('nvmesh_object', choices=['cluster', 'target', 'client', 'volume', 'drive', 'manager',
                                                       'sshuser', 'apiuser', 'vpg', 'driveclass', 'targetclass',
                                                       'host', 'log', 'drivemodel', 'version', 'license'],
                             help='The NVMesh object you want to list or view.')
    show_parser.add_argument('-a', '--all', required=False, action='store_const', const=True, default=False,
                             help='Show all logs. Per default only alerts are shown.')
    show_parser.add_argument('-C', '--Class', nargs='+', required=False,
                             help='A single or a space separated list of NVMesh drives or target classes.')
    show_parser.add_argument('-d', '--detail', required=False, action='store_const', const=True,
                             help='Show more details.')
    show_parser.add_argument('-l', '--layout', required=False, action='store_const', const=True,
                             help='Show the volume layout details. To be used together with the "-d" switch.')
    show_parser.add_argument('-j', '--json', required=False, action='store_const', const=True,
                             help='Format output as JSON.')
    show_parser.add_argument('-s', '--server', nargs='+', required=False,
                             help='Space separated list or single server.')
    show_parser.add_argument('-S', '--short-name', required=False, action='store_const', const=True,
                             help='Show short hostnames.')
    show_parser.add_argument('-t', '--tsv', required=False, action='store_const', const=True,
                             help='Format output as tabulator separated values.')
    show_parser.add_argument('-v', '--volume', nargs='+', required=False,
                             help='View a single NVMesh volume or a list of volumes.')
    show_parser.add_argument('-p', '--vpg', nargs='+', required=False,
                             help='View a single or a list of NVMesh volume provisioning groups.')

    @with_argparser(show_parser)
    @with_category("NVMesh Resource Management")
    def do_show(self, args):
        """List and view specific Nvmesh objects and its properties. The 'list sub-command allows output in a table,
        tabulator separated value or JSON format. E.g 'show target' will list all targets. In case you want to see the
        properties of only one or just a few you need to use the '-s' or '--server' option to specify single or a list
        of servers/targets. E.g. 'list targets -s target1 target2'"""
        user.get_api_user()
        if args.nvmesh_object == 'target':
            self.poutput(show_target(args.detail,
                                     args.tsv,
                                     args.json,
                                     args.server,
                                     args.short_name))
        elif args.nvmesh_object == 'client':
            self.poutput(show_clients(args.tsv,
                                      args.json,
                                      args.server,
                                      args.short_name))
        elif args.nvmesh_object == 'volume':
            self.poutput(show_volumes(args.detail,
                                      args.tsv,
                                      args.json,
                                      args.volume,
                                      args.short_name,
                                      args.layout))
        elif args.nvmesh_object == 'sshuser':
            self.poutput(user.get_ssh_user()[0])
        elif args.nvmesh_object == 'apiuser':
            self.poutput(user.get_api_user())
        elif args.nvmesh_object == 'manager':
            self.poutput(show_manager())
        elif args.nvmesh_object == 'cluster':
            self.poutput(show_cluster(args.tsv,
                                      args.json))
        elif args.nvmesh_object == 'vpg':
            self.poutput(show_vpgs(args.tsv,
                                   args.json,
                                   args.vpg))
        elif args.nvmesh_object == 'driveclass':
            self.poutput(show_drive_classes(args.detail,
                                            args.tsv,
                                            args.json,
                                            args.Class))
        elif args.nvmesh_object == 'targetclass':
            self.poutput(show_target_classes(args.tsv,
                                             args.json,
                                             args.Class))
        elif args.nvmesh_object == 'host':
            self.poutput("\n".join(hosts.manage_hosts("get", None, False)))
        elif args.nvmesh_object == 'log':
            self.ppaged(show_logs(args.all))
        elif args.nvmesh_object == 'drive':
            self.poutput(show_drives(args.detail,
                                     args.server,
                                     args.tsv))
        elif args.nvmesh_object == 'drivemodel':
            self.poutput(show_drive_models(args.detail))
        elif args.nvmesh_object == 'version':
            self.poutput(": ".join(["Nvmesh CLI version", __version__]))
        elif args.nvmesh_object == 'license':
            self.ppaged(__license__)
        cli_exit.validate_exit()

    add_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    add_parser.add_argument('nvmesh_object', choices=['host', 'volume', 'driveclass', 'targetclass'],
                            help='Add hosts to this shell environment or '
                                 'add/create new NVMesh volumes or drive classes.')
    add_parser.add_argument('-a', '--autocreate', required=False, action='store_const', const=True, default=False,
                            help='Create the drive classes automatically grouped by the available drive models.')
    add_parser.add_argument('-r', '--raid_level', nargs=1, required=False,
                            help='The RAID level of the volume. Options: lvm, 0, 1, 10')
    add_parser.add_argument('-v', '--vpg', nargs=1, required=False,
                            help='Optional - The volume provisioning group to use.')
    add_parser.add_argument('-o', '--domain', nargs=1, required=False,
                            help='Awareness domain information to use for new volume/s or a VPG.')
    add_parser.add_argument('-D', '--description', nargs=1, required=False,
                            help='Optional - Volume description')
    add_parser.add_argument('-l', '--limit-by-disk', nargs='+', required=False,
                            help='Optional - Limit volume allocation to specific drives.')
    limit_target_server_group = add_parser.add_mutually_exclusive_group()
    limit_target_server_group.add_argument('-L', '--limit-by-target', nargs='+', required=False,
                                           help='Optional - Limit volume allocation to specific target nodes.')
    drive_file_group = add_parser.add_mutually_exclusive_group()
    drive_file_group.add_argument('-m', '--drive', nargs='+', required=False,
                                  help='Drive/media information. Needs to include the drive ID/serial and the target'
                                       'node/server name in the format driveId:targetName'
                                       'Example: -m "Example: 174019659DA4.1:test.lab"')
    drive_file_group.add_argument('-f', '--file', nargs=1, required=False,
                                  help='Path to the file containing the driveId:targetName information. '
                                       'Needs to'
                                       'Example: -f "/path/to/file". This argument is not allowed together with the -m '
                                       'argument')
    add_parser.add_argument('-M', '--model', nargs=1, required=False,
                            help='Drive model information for the new drive class. '
                                 'Note: Must be the exactly the same model designator as when running the'
                                 '"show drivemodel -d" or "show drive -d" command!')
    add_parser.add_argument('-n', '--name', nargs=1, required=False,
                            help='Name of the volume, must be unique, will be the ID of the volume.')
    add_parser.add_argument('-O', '--classdomain', nargs='+', required=False,
                            help="Awareness domain/s information of the target or drive class. "
                                 "A domain has a scope and identifier component. "
                                 "You must provide both components for each domain to be used/created."
                                 "-O scope:Rack&identifier:A "
                                 "or in case you want to use more than one domain descriptor:"
                                 "-O scope:Rack&identifier:A scope:Datacenter&identifier:DRsite")
    add_parser.add_argument('-P', '--parity', nargs=1, required=False,
                            help='Parity configuration. Required for Erasure Coding NVMesh volumes. Example: "8+2" '
                                 'which equals to 8 data blocks + 2 parity blocks')
    add_parser.add_argument('-R', '--node-redundancy', nargs=1, required=False,
                            help='NVMesh Target node redundancy configuration. Required for Erasure Coding NVMesh '
                                 'volumes. NVMesh supports three target node redundancy levels, aka. protection levels.'
                                 '0 = no separation or redundancy on the node level; 1 = N+1 node redundancy or '
                                 'minimal separation; 2 = N+2 redundancy or maximal separation. Chose between 0, 1, '
                                 'or 2.')
    add_parser.add_argument('-c', '--count', nargs=1, required=False,
                            help='Number of volumes to create and add. 100 Max.')
    add_parser.add_argument('-t', '--target-class', nargs='+', required=False,
                            help='Limit volume allocation to specific target classes.')
    add_parser.add_argument('-d', '--drive-class', nargs='+', required=False,
                            help='Limit volume allocation to specific drive classes.')
    add_parser.add_argument('-w', '--stripe-width', nargs=1, required=False,
                            help='Number of disks to use. Required for R0 and R10.')
    limit_target_server_group.add_argument('-s', '--server', nargs='+', required=False,
                                           help='Specify a single server or a space separated list of servers.')
    add_parser.add_argument('-S', '--size', nargs=1, required=False,
                            help='Specify the size of the new volume. The volumes size value is base*2/binary. '
                                 'Example: -S 12GB or 12GiB will create a volume with a size of 12884901888 bytes.'
                                 'Some valid input formats samples: xGB, x GB, x gigabyte, x GiB or xG')

    @with_argparser(add_parser)
    @with_category("NVMesh Resource Management")
    def do_add(self, args):
        """The 'add' sub-command will let you add nvmesh objects to your cluster. E.g. 'add host' will add host
        entries to your nvmeshcli environment while 'add volume' will create and add a new volume to the NVMesh
        cluster."""
        action = "add"
        if args.nvmesh_object == 'host':
            hosts.manage_hosts(action,
                               args.server,
                               False)
        elif args.nvmesh_object == 'driveclass':
            if args.autocreate:
                self.poutput(manage_drive_class("autocreate",
                                                None,
                                                None,
                                                None,
                                                None,
                                                None,
                                                None,
                                                None))
            else:
                if args.name is None:
                    print formatter.yellow(
                        "Drive class name missing! Use the -n argument to provide a name.")
                    return
                if not args.model:
                    print formatter.yellow(
                        "No drive model information specified. Use the -M argument to provide the drive model "
                        "information.")
                    return
                self.poutput(manage_drive_class("save",
                                                None,
                                                args.drive,
                                                args.model,
                                                args.name,
                                                args.description,
                                                args.classdomain,
                                                args.file))
        elif args.nvmesh_object == 'targetclass':
            if args.autocreate:
                self.poutput(manage_target_class("autocreate",
                                                 None,
                                                 None,
                                                 None,
                                                 None,
                                                 None))
            else:
                if args.name is None:
                    print formatter.yellow(
                        "Target class name missing! Use the -n argument to provide a name.")
                    return
                if not args.server:
                    print formatter.yellow(
                        "No target servers specified. use the -s argument to provide a space separated list of targets"
                        "to be used. At least one target must be defined.")
                    return
                self.poutput(manage_target_class("save",
                                                 None,
                                                 args.name[0],
                                                 args.server,
                                                 args.description,
                                                 parse_domain_args(args.classdomain)))
        elif args.nvmesh_object == 'volume':

            if args.limit_by_target:
                for server in args.limit_by_target:
                    if not bool(re.match(
                            "^(([a-zA-Z]|[a-zA-Z][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z]|[A-Za-z][A-Za-z0-9\-]*[A-Za-z0-9])$",
                            server)):
                        print(formatter.yellow(
                            "Provided hostname " + server + " is not a valid target/server name! "
                                                            "If you try to provide a list of multiple servers, please "
                                                            "use a space separated list of server names!"))
                        return

            if args.name is None:
                print(formatter.yellow(
                    "Volume name missing! Use the -n argument to provide a volume name"))
                return
            if args.size is None:
                print(formatter.yellow(
                    "Size/capacity information is missing! Use the -S argument to provide the volume size."))
                return
            if args.raid_level is None and args.vpg is None:
                print(formatter.yellow(
                    "Raid level information missing! Use the -r argument to set the raid level."))
                return
            if args.raid_level[0] == 'ec':
                if args.parity is None:
                    print(formatter.yellow(
                        "Erasure coding parity information missing! Use the -P argument to set the parity "
                        "configuration."))
                    return
                if args.node_redundancy is None:
                    print(formatter.yellow(
                        "Erasure coding node redundancy aka. protection level information missing! Use the -R argument "
                        "to set the node redundancy configuration."))
                    return
            if args.vpg is None:
                if '0' in args.raid_level[0] and args.stripe_width is None:
                    print(formatter.yellow(
                        "Stripe width information missing! Use the -w argument to set the stripe width."))
                    return
            if args.count is not None:
                if int(args.count[0]) > 100:
                    self.poutput(formatter.yellow("Count too high! The max is 100."))
                    return
                else:
                    count = 1
                    while count <= int(args.count[0]):
                        name = "".join([args.name[0], "%03d" % (count,)])
                        count = count + 1
                        self.poutput(manage_volume('create',
                                                   name,
                                                   args.size,
                                                   args.description,
                                                   args.drive_class,
                                                   args.target_class,
                                                   args.limit_by_target,
                                                   args.limit_by_disk,
                                                   args.domain,
                                                   args.raid_level,
                                                   args.stripe_width,
                                                   args.vpg,
                                                   None,
                                                   args.parity,
                                                   args.node_redundancy))
            else:
                self.poutput(manage_volume('create',
                                           args.name[0],
                                           args.size,
                                           args.description,
                                           args.drive_class,
                                           args.target_class,
                                           args.limit_by_target,
                                           args.limit_by_disk,
                                           args.domain,
                                           args.raid_level,
                                           args.stripe_width,
                                           args.vpg,
                                           None,
                                           args.parity,
                                           args.node_redundancy))
        elif args.nvmesh_object == 'vpg':
            if args.name is None:
                print(formatter.yellow(
                    "VPG name missing! Use the -n argument to provide a VPG name."))
                return
            if args.size is None:
                print(formatter.yellow(
                    "Size/capacity information is missing! Use the -S argument to provide the volume size."))
                return
            if args.raid_level is None and args.vpg is None:
                print(formatter.yellow(
                    "Raid level information missing! Use the -r argument to set the raid level."))
                return
            if args.raid_level[0] == 'ec':
                if args.parity is None:
                    print(formatter.yellow(
                        "Erasure coding parity information missing! Use the -P argument to set the parity "
                        "configuration."))
                    return
                if args.node_redundancy is None:
                    print(formatter.yellow(
                        "Erasure coding node redundancy aka. protection level information missing! Use the -R argument "
                        "to set the node redundancy configuration."))
                    return
            self.poutput(manage_vpg('save',
                                    args.name,
                                    args.size,
                                    args.description,
                                    args.drive_class,
                                    args.target_class,
                                    args.domain,
                                    args.raid_level,
                                    args.stripe_width))
        cli_exit.validate_exit()

    delete_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    delete_parser.add_argument('nvmesh_object', choices=['host', 'volume', 'drive', 'driveclass', 'targetclass', 'vpg', 'nic'],
                               help='Delete hosts, servers, drives, drive classes, nic and target classes.')
    delete_parser.add_argument('-s', '--server', nargs='+',
                               help='Specify a single server or a list of servers.')
    delete_parser.add_argument('-t', '--target-class', nargs='+',
                               help='Specify a single target class or a space separated list of target classes.')
    delete_parser.add_argument('-d', '--drive-class', nargs='+',
                               help='Specify a single drive class or a space separated list of drive classes.')
    delete_parser.add_argument('-D', '--drive', nargs='+',
                               help='The drive ID of the drive to be deleted in the NVMesh cluster.')
    delete_parser.add_argument('-v', '--volume', nargs='+',
                               help='Specify a single volume or a space separated list of volumes.')
    delete_parser.add_argument('-f', '--force', required=False, action='store_const', const=True, default=False,
                               help='Use this flag to forcefully delete the volume/s.')
    delete_parser.add_argument('-N', '--nic', required=False, nargs=1,
                               help='Specify the NIC to be deleted.')
    delete_parser.add_argument('-y', '--yes', required=False, action='store_const', const=True,
                               help="Automatically answer 'yes' and skip operational warnings.")

    @with_argparser(delete_parser)
    @with_category("NVMesh Resource Management")
    def do_delete(self, args):
        """The 'delete' sub-command will let you delete nvmesh objects in your cluster or nvmesh-shell runtime
        environment. E.g. 'delete host' will delete host entries in your nvmesh-shell environment and 'delete volume'
        will delete NVMesh volumes in your NVMesh cluster."""
        action = "delete"
        if args.nvmesh_object == 'host':
            hosts.manage_hosts(action,
                               args.server,
                               False)
        elif args.nvmesh_object == 'targetclass':
            if args.target_class is None:
                print(formatter.yellow(
                    "Class information is missing! Use the -t/--target-class option to specify the class "
                    "or list of classes to be deleted."))
                return
            if args.target_class[0] == 'all':
                self.poutput(manage_target_class('delete',
                                                 get_target_class_list(),
                                                 None,
                                                 None,
                                                 None,
                                                 None))
            else:
                self.poutput(manage_target_class('delete',
                                                 args.target_class,
                                                 None,
                                                 None,
                                                 None,
                                                 None))
        elif args.nvmesh_object == 'driveclass':
            if args.drive_class is None:
                print(formatter.yellow(
                    "Class information is missing! Use the -d/--drive-class option to specify the class "
                    "or list of classes to be deleted."))
                return
            if args.drive_class[0] == 'all':
                self.poutput(manage_drive_class('delete',
                                                get_drive_class_list(),
                                                None,
                                                None,
                                                None,
                                                None,
                                                None,
                                                None))
            else:
                self.poutput(manage_drive_class('delete',
                                                args.drive_class,
                                                None,
                                                None,
                                                None,
                                                None,
                                                None,
                                                None))
        elif args.nvmesh_object == 'volume':
            if args.volume[0] == 'all':
                volume_list = get_volume_list()
            else:
                volume_list = args.volume
            if args.yes:
                self.poutput(manage_volume('remove',
                                           volume_list,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None,
                                           None))
            else:
                if "y" in raw_input(WARNINGS['delete_volume']).lower():
                    self.poutput(manage_volume('remove',
                                               volume_list,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None,
                                               None))
                else:
                    return
        elif args.nvmesh_object == 'drive':
            if args.drive:
                self.poutput(manage_drive('delete', args.drive, None))
            else:
                cli_exit.error = True
                print(formatter.yellow("Use the -D/--drive argument to specify the drive to be deleted."))

        elif args.nvmesh_object == 'nic':
            if args.nic:
                self.poutput(manage_nic('delete', args.nic[0]))
            else:
                cli_exit.error = True
                print(formatter.yellow("Use the -N/--nic argument to specify the NIC to be deleted."))

        elif args.nvmesh_object == 'vpg':
            if args.name is None:
                print(formatter.yellow(
                    "VPG name missing! Use the -n argument to provide a VPG name."))
                return

            self.poutput(manage_vpg('delete',
                                    args.name[0],
                                    None,
                                    None,
                                    None,
                                    None,
                                    None,
                                    None,
                                    None))
        cli_exit.validate_exit()

    attach_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    attach_parser.add_argument('-c', '--client', nargs='+', required=True,
                               help='Specify a single server or a space separated list of servers.')
    attach_parser.add_argument('-v', '--volume', nargs='+', required=True,
                               help='Specify a single volume or a space separated list of volumes.')

    @with_argparser(attach_parser)
    @with_category("NVMesh Resource Management")
    def do_attach(self, args):
        """The 'attach' sub-command will let you attach NVMesh volumes to the clients in your NVMesh cluster."""
        if args.client[0] == 'all':
            client_list = get_client_list(True)
        else:
            client_list = args.client
        if args.volume[0] == 'all':
            volume_list = get_volume_list()
        else:
            volume_list = args.volume
        self.poutput(attach_detach_volumes('attach',
                                           client_list,
                                           volume_list))
        cli_exit.validate_exit()

    detach_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    detach_parser.add_argument('-c', '--client', nargs='+', required=True,
                               help='Specify a single server or a space separated list of servers.')
    detach_parser.add_argument('-v', '--volume', nargs='+', required=True,
                               help='Specify a single volume or a space separated list of volumes.')
    detach_parser.add_argument('-y', '--yes', required=False, action='store_const', const=True,
                               help="Automatically answer 'yes' and skip operational warnings.")

    @with_argparser(detach_parser)
    @with_category("NVMesh Resource Management")
    def do_detach(self, args):
        """The 'detach' sub-command will let you detach NVMesh volumes in your NVMesh cluster."""
        if args.client[0] == 'all':
            client_list = get_client_list(True)
        else:
            client_list = args.client
        if args.volume[0] == 'all':
            volume_list = get_volume_list()
        else:
            volume_list = args.volume
        self.poutput(attach_detach_volumes('detach',
                                           client_list,
                                           volume_list))
        cli_exit.validate_exit()

    check_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    check_parser.add_argument('nvmesh_object', choices=['client', 'target', 'manager', 'cluster'],
                              help='Specify where you want to check the NVMesh services status.')
    check_parser.add_argument('-d', '--detail', required=False, action='store_const', const=True,
                              help='Show detailed service information.')
    check_parser.add_argument('-p', '--prefix', required=False, action='store_const', const=True, default=True,
                              help='Adds the host name at the beginning of each line. This helps to identify the '
                                   'content when piping into a grep or similar')
    check_parser.add_argument('-P', '--parallel', required=False, action='store_const', const=True, default=True,
                              help='Check the hosts/servers in parallel.')
    check_parser.add_argument('-s', '--server', nargs='+', required=False,
                              help='Specify a single or a space separated list of managers, targets or clients.')

    @with_argparser(check_parser)
    @with_category("NVMesh Resource Management")
    def do_check(self, args):
        """The 'check' sub-command checks and let you list the status of the actual NVMesh services running in your
        cluster. It is using SSH connectivity to the NVMesh managers, clients or targets to verify the service status.
        E.g.'check target' will check the NVMesh target services throughout the cluster."""
        user.get_ssh_user()
        user.get_api_user()
        action = "check"
        if args.nvmesh_object == 'target':
            self.poutput(manage_nvmesh_service('target',
                                               args.detail,
                                               args.server,
                                               action,
                                               args.prefix,
                                               args.parallel,
                                               False))
        elif args.nvmesh_object == 'client':
            self.poutput(manage_nvmesh_service('client',
                                               args.detail,
                                               args.server,
                                               action,
                                               args.prefix,
                                               args.parallel,
                                               False))
        elif args.nvmesh_object == 'manager':
            self.poutput(manage_nvmesh_service('mgr',
                                               args.detail,
                                               args.server,
                                               action,
                                               args.prefix,
                                               args.parallel,
                                               False))
        elif args.nvmesh_object == 'cluster':
            manage_cluster(args.detail,
                           action,
                           args.prefix)
        cli_exit.validate_exit()

    stop_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    stop_parser.add_argument('nvmesh_object', choices=['client', 'target', 'manager', 'cluster', 'mcm'],
                             help='Specify the NVMesh service type you want to top.')
    stop_parser.add_argument('-d', '--detail', required=False, action='store_const', const=True,
                             help='List and view the service details.')
    stop_parser.add_argument('-g', '--graceful', nargs=1, required=False, default="True", choices=['True', 'False'],
                             help="Graceful stop of all NVMesh targets in the cluster."
                                  " The default is set to 'True'")
    stop_parser.add_argument('-p', '--prefix', required=False, action='store_const', const=True, default=True,
                             help='Adds the host name at the beginning of each line. This helps to identify the '
                                  'content when piping into a grep or similar')
    stop_parser.add_argument('-P', '--parallel', required=False, action='store_const', const=True, default=True,
                             help='Stop the NVMesh services in parallel.')
    stop_parser.add_argument('-s', '--server', nargs='+', required=False,
                             help='Specify a single or a space separated list of managers, targets or clients.')
    stop_parser.add_argument('-y', '--yes', required=False, action='store_const', const=True,
                             help="Automatically answer 'yes' and skip operational warnings.")

    @with_argparser(stop_parser)
    @with_category("NVMesh Resource Management")
    def do_stop(self, args):
        """The 'stop' sub-command will stop the selected NVMesh services on managers, targets or clients. Or it will
        stop the entire NVMesh cluster. It uses SSH connectivity to manage the NVMesh services. E.g. 'stop client' will
        stop all the NVMesh clients throughout the cluster."""
        user.get_ssh_user()
        user.get_api_user()
        action = "stop"
        if args.nvmesh_object == 'target':
            if args.yes:
                self.poutput(manage_nvmesh_service('target',
                                                   args.detail,
                                                   args.server,
                                                   action,
                                                   args.prefix,
                                                   args.parallel, (False if args.graceful[0] == "False" else True)))
            else:
                if "y" in raw_input(WARNINGS['stop_nvmesh_target']).lower():
                    self.poutput(manage_nvmesh_service('target',
                                                       args.detail,
                                                       args.server,
                                                       action,
                                                       args.prefix,
                                                       args.parallel, (False if args.graceful[0] == "False" else True)))
                else:
                    return
        elif args.nvmesh_object == 'client':
            if args.yes:
                self.poutput(manage_nvmesh_service('client',
                                                   args.detail,
                                                   args.server,
                                                   action,
                                                   args.prefix,
                                                   args.parallel,
                                                   False))
            else:
                if "y" in raw_input(WARNINGS['stop_nvmesh_client']).lower():
                    self.poutput(manage_nvmesh_service('client',
                                                       args.detail,
                                                       args.server,
                                                       action,
                                                       args.prefix,
                                                       args.parallel,
                                                       False))
                else:
                    return
        elif args.nvmesh_object == 'manager':
            if args.yes:
                self.poutput(manage_nvmesh_service('mgr',
                                                   args.detail,
                                                   args.server,
                                                   action,
                                                   args.prefix,
                                                   args.parallel,
                                                   False))
            else:
                if "y" in raw_input(WARNINGS['stop_nvmesh_manager']).lower():
                    self.poutput(manage_nvmesh_service('mgr',
                                                       args.detail,
                                                       args.server,
                                                       action,
                                                       args.prefix,
                                                       args.parallel,
                                                       False))
                else:
                    return
        elif args.nvmesh_object == 'cluster':
            if args.yes:
                manage_cluster(args.detail,
                               action,
                               args.prefix)
            else:
                if "y" in raw_input(WARNINGS['stop_cluster']).lower():
                    manage_cluster(args.detail,
                                   action,
                                   args.prefix)
                else:
                    return
        elif args.nvmesh_object == 'mcm':
            manage_mcm(args.server, action)
        cli_exit.validate_exit()

    start_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    start_parser.add_argument('nvmesh_object', choices=['client', 'target', 'manager', 'cluster', 'mcm'],
                              help='Specify the NVMesh service type you want to start.')
    start_parser.add_argument('-d', '--detail', required=False, action='store_const', const=True,
                              help='List and view the service details.')
    start_parser.add_argument('-p', '--prefix', required=False, action='store_const', const=True, default=True,
                              help='Adds the host name at the beginning of each line. This helps to identify the '
                                   'content when piping into a grep or similar')
    start_parser.add_argument('-P', '--parallel', required=False, action='store_const', const=True, default=True,
                              help='Start the NVMesh services on the hosts/servers in parallel.')
    start_parser.add_argument('-s', '--server', nargs='+', required=False,
                              help='Specify a single or a space separated list of servers.')

    @with_argparser(start_parser)
    @with_category("NVMesh Resource Management")
    def do_start(self, args):
        """The 'start' sub-command will start the selected NVMesh services on managers, targets or clients. Or it will
        start the entire NVMesh cluster. It uses SSH connectivity to manage the NVMesh services. E.g. 'start cluster'
        will start all the NVMesh services throughout the cluster."""
        user.get_ssh_user()
        user.get_api_user()
        action = "start"
        if args.nvmesh_object == 'target':
            self.poutput(manage_nvmesh_service('target',
                                               args.detail,
                                               args.server,
                                               action,
                                               args.prefix,
                                               args.parallel,
                                               False))
        elif args.nvmesh_object == 'client':
            self.poutput(manage_nvmesh_service('client',
                                               args.detail,
                                               args.server,
                                               action,
                                               args.prefix,
                                               args.parallel,
                                               False))
        elif args.nvmesh_object == 'manager':
            self.poutput(manage_nvmesh_service('mgr',
                                               args.detail,
                                               args.server,
                                               action,
                                               args.prefix,
                                               args.parallel,
                                               False))
        elif args.nvmesh_object == 'cluster':
            manage_cluster(args.detail,
                           action,
                           args.prefix)
        elif args.nvmesh_object == 'mcm':
            manage_mcm(args.server,
                       action)
        cli_exit.validate_exit()

    restart_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    restart_parser.add_argument('nvmesh_object', choices=['client', 'target', 'manager', 'cluster', 'mcm'],
                                help='Specify the NVMesh service which you want to restart.')
    restart_parser.add_argument('-d', '--detail', required=False, action='store_const', const=True,
                                help='List and view the service details.')
    restart_parser.add_argument('-g', '--graceful', nargs=1, required=False, default="True", choices=['True', 'False'],
                                help='Restart with a graceful stop of the targets in the cluster.'
                                     'The default is set to True')
    restart_parser.add_argument('-p', '--prefix', required=False, action='store_const', const=True, default=True,
                                help='Adds the host name at the beginning of each line. This helps to identify the '
                                     'content when piping into a grep or similar')
    restart_parser.add_argument('-P', '--parallel', required=False, action='store_const', const=True, default=True,
                                help='Restart the NVMesh services on the hosts/servers in parallel.')
    restart_parser.add_argument('-s', '--server', nargs='+', required=False,
                                help='Specify a single or a space separated list of servers.')
    restart_parser.add_argument('-y', '--yes', required=False, action='store_const', const=True,
                                help="Automatically answer 'yes' and skip operational warnings.")

    @with_argparser(restart_parser)
    @with_category("NVMesh Resource Management")
    def do_restart(self, args):
        """The 'restart' sub-command will restart the selected NVMesh services on managers, targets or clients. Or it
        will restart the entire NVMesh cluster. It uses SSH connectivity to manage the NVMesh services.
        E.g. 'restart manager' will restart the NVMesh management service."""
        user.get_ssh_user()
        user.get_api_user()
        action = 'restart'
        if args.nvmesh_object == 'target':
            if args.yes:
                self.poutput(manage_nvmesh_service('target',
                                                   args.detail,
                                                   args.server,
                                                   action,
                                                   args.prefix,
                                                   args.parallel, (False if args.graceful[0] == "False" else True)))
            else:
                if "y" in raw_input(WARNINGS['stop_nvmesh_target']).lower():
                    self.poutput(manage_nvmesh_service('target',
                                                       args.detail,
                                                       args.server,
                                                       action,
                                                       args.prefix,
                                                       args.parallel, (False if args.graceful[0] == "False" else True)))
                else:
                    return
        elif args.nvmesh_object == 'client':
            if args.yes:
                self.poutput(manage_nvmesh_service('client',
                                                   args.detail,
                                                   args.server,
                                                   action,
                                                   args.prefix,
                                                   args.parallel,
                                                   False))
            else:
                if "y" in raw_input(WARNINGS['stop_nvmesh_client']).lower():
                    self.poutput(manage_nvmesh_service('client',
                                                       args.detail,
                                                       args.server,
                                                       action,
                                                       args.prefix,
                                                       args.parallel,
                                                       False))
                else:
                    return
        elif args.nvmesh_object == 'manager':
            if args.yes:
                self.poutput(manage_nvmesh_service('mgr',
                                                   args.detail,
                                                   args.server,
                                                   action,
                                                   args.prefix,
                                                   args.parallel,
                                                   False))
            else:
                if "y" in raw_input(WARNINGS['stop_nvmesh_manager']).lower():
                    self.poutput(manage_nvmesh_service('mgr',
                                                       args.detail,
                                                       args.server,
                                                       action,
                                                       args.prefix,
                                                       args.parallel,
                                                       False))
                else:
                    return
        elif args.nvmesh_object == 'mcm':
            manage_mcm(args.server,
                       action)
        elif args.nvmesh_object == 'cluster':
            manage_cluster(args.detail,
                           action,
                           args.prefix)
        cli_exit.validate_exit()

    define_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    define_parser.add_argument('nvmesh_object', choices=['manager', 'sshuser', 'apiuser'],
                               help='Specify the NVMesh shell runtime variable you want to define.')

    @with_argparser(define_parser)
    @with_category("NVMesh Resource Management")
    def do_define(self, args):
        """The 'define' sub-command defines/sets the shell runtime variables as NVMesh management servers and user
        credentials to be used. E.g. 'define apiuser' will set the NVMesh API user name to be used for all the
        operations involving the API"""
        if args.nvmesh_object == 'sshuser':
            user.SSH_user_name = raw_input("Please provide the user name to be used for SSH connectivity: ")
            user.SSH_password = getpass.getpass("Please provide the SSH password: ")
            if 'y' in raw_input("Do you require sudo for SSH remote command execution? [Yes|No] :"):
                user.save_ssh_sudo(True)
            else:
                user.save_ssh_sudo(False)
            user.save_ssh_user()
        elif args.nvmesh_object == 'apiuser':
            user.API_user_name = raw_input("Please provide a administrative API user name: ")
            user.API_password = getpass.getpass("Please provide the API password: ")
            user.save_api_user()
        elif args.nvmesh_object == 'manager':
            ManagementServer().save_management_server(raw_input(
                "Provide a space separated list, min. one, of the NVMesh manager server name/s: ").split(" "))
        cli_exit.validate_exit()

    runcmd_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    runcmd_parser.add_argument('scope', choices=['client', 'target', 'manager', 'cluster', 'host'],
                               help='Specify the scope where you want to run the command.')
    runcmd_parser.add_argument('-c', '--command', nargs='+', required=True,
                               help='The command you want to run on the servers. Use quotes if the command needs to run'
                                    ' with flags by itself, like: runcmd cluster -c "uname -a"')
    runcmd_parser.add_argument('-p', '--prefix', required=False, action='store_const', const=True, default=True,
                               help='Adds the host name at the beginning of each line. This helps to identify the '
                                    'content when piping into a grep or similar tasks.')
    runcmd_parser.add_argument('-P', '--parallel', required=False, action='store_const', const=True, default=True,
                               help='Runs the remote command on the remote hosts in parallel.')
    runcmd_parser.add_argument('-s', '--server', nargs='+', required=False,
                               help='Specify list of servers and or hosts.')

    @with_argparser(runcmd_parser)
    @with_category("NVMesh Resource Management")
    def do_runcmd(self, args):
        """Run a remote shell command across the whole NVMesh cluster, or just the targets, clients, managers or a list
        of selected servers and hosts. Excample: runcmd manager -c systemctl status mongod"""
        user.get_ssh_user()
        user.get_api_user()
        self.poutput(self.run_command(args.command,
                                      args.scope,
                                      args.prefix,
                                      args.parallel,
                                      args.server))
        cli_exit.validate_exit()

    @staticmethod
    def run_command(command, scope, prefix, parallel, server_list):
        try:
            host_list = []
            ssh = SSHRemoteOperations()
            command_line = " ".join(command)
            if server_list is not None:
                host_list = server_list
            else:
                if scope == 'cluster':
                    host_list = get_target_list(short=True)
                    host_list.extend(get_client_list(False))
                    host_list.extend(mgmt.get_management_server_list())
                if scope == 'target':
                    host_list = get_target_list(short=True)
                if scope == 'client':
                    host_list = get_client_list(False)
                if scope == 'manager':
                    host_list = mgmt.get_management_server_list()
                if scope == 'host':
                    host_list = Hosts().manage_hosts('get', None, False)
            host_list = set(host_list)
            command_return_list = []
            if parallel is True:
                process_pool = Pool(len(host_list))
                parallel_execution_map = []
                for host in host_list:
                    parallel_execution_map.append([host, command_line])
                command_return_list = process_pool.map(run_parallel_ssh_command, parallel_execution_map)
                process_pool.close()
            else:
                for host in host_list:
                    command_return = ssh.return_remote_command_std_output(host, command_line)
                    if command_return:
                        command_return_list.append([host, command_return])
            output = []
            for command_return in command_return_list:
                if command_return[1][0] != 0:
                    cli_exit.error = True
                    output_line = formatter.red(" ".join(["Return Code %s," % (
                        command_return[1][0]), command_return[1][1]]))
                    if prefix is True:
                        output.append(formatter.add_line_prefix(command_return[0], output_line, True))
                    else:
                        output.append(output_line)
                else:
                    if len(command_return[1][1]) < 1:
                        output_line = formatter.green("OK")
                    else:
                        output_line = command_return[1][1]
                    if prefix is True:
                        output.append(formatter.add_line_prefix(command_return[0], output_line, True))
                    else:
                        output.append(output_line)
            return "\n".join(output)
        except Exception, e:
            print(formatter.red("Error: " + e.message))
            logging.critical(e.message)
            cli_exit.error = True

    testssh_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    testssh_parser.add_argument('-s', '--server', nargs='+', required=False,
                                help='Specify a server or a list of servers and/or hosts.')

    @with_argparser(testssh_parser)
    @with_category("NVMesh Resource Management")
    def do_testssh(self, args):
        """Test the SSH connectivity to all, a list of, or individual servers and hosts.
        Excample: testssh -s servername"""
        ssh = SSHRemoteOperations()
        user.get_ssh_user()
        ssh.test_ssh_connection(args.server)
        cli_exit.validate_exit()

    update_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    update_parser.add_argument('object', choices=['volume', 'driveclass', 'targetclass'],
                               help='Specify the NVMesh object to be updated.')
    update_parser.add_argument('-n', '--name', nargs=1, required=True,
                               help='The name of the object to be updated.')
    update_parser.add_argument('-S', '--size', nargs='+', required=False,
                               help='The new/updated size/capacity of the volume.\n '
                                    'The volumes size value is base*2/binary. \n'
                                    'Example: -s 12GB or 12GiB will size the volume with a size of 12884901888 bytes.\n'
                                    'Some valid input formats samples: xGB, x GB, x gigabyte, x GiB or xG')
    update_parser.add_argument('-D', '--description', required=False, nargs='+',
                               help='The new/updated name of the NVMesh object.')
    update_parser.add_argument('-s', '--server', nargs='+', required=False, help='Specify a single server or a space '
                                                                                 'separated list of servers.')
    drive_file_group = update_parser.add_mutually_exclusive_group()
    drive_file_group.add_argument('-m', '--drive', nargs='+', required=False,
                                  help='Drive/media information. Needs to include the drive ID/serial and the target'
                                       'node/server name in the format driveId:targetName'
                                       'Example: -m "Example: 174019659DA4.1:test.lab"')
    drive_file_group.add_argument('-f', '--file', nargs=1, required=False,
                                  help='Path to the file containing the driveId:targetName information. '
                                       'Needs to'
                                       'Example: -f "/path/to/file". This argument is not allowed together with the -m '
                                       'argument')
    update_parser.add_argument('-l', '--limit-by-disk', nargs='+', required=False,
                               help='Optional - Limit volume allocation to specific drives.')
    update_parser.add_argument('-L', '--limit-by-target', nargs='+', required=False,
                               help='Optional - Limit volume allocation to specific target nodes.')
    update_parser.add_argument('-t', '--target-class', nargs='+', required=False,
                               help='Optional - Limit volume allocation to specific target classes.')
    update_parser.add_argument('-d', '--drive-class', nargs='+', required=False,
                               help='Optional - Limit volume allocation to specific drive classes.')

    @with_argparser(update_parser)
    @with_category("NVMesh Resource Management")
    def do_update(self, args):
        """Update and edit an existing NVMesh volume, driveclass or targetclass."""
        if get_api_ready() == 0:
            if args.object == 'volume':
                volume = json.loads(nvmesh.get_volume(args.name[0]))
                if len(volume) == 0:
                    print(formatter.yellow("%s is not a valid volume name. A volume with this name doesn't exist."
                                           % args.name[0]))
                    return
                else:
                    self.poutput(update_volume(volume[0],
                                               args.size,
                                               args.description,
                                               args.limit_by_disk,
                                               args.limit_by_target,
                                               args.drive_class,
                                               args.target_class))
            elif args.object == 'targetclass':
                target_class = json.loads(nvmesh.get_target_class(args.name[0]))
                if len(target_class) == 0:
                    print(formatter.yellow("%s is not a valid target class name. "
                                           "A target class with this name doesn't exist."
                                           % args.name[0]))
                    return
                else:
                    self.poutput(update_target_class(target_class[0],
                                                     args.server,
                                                     args.description))
            elif args.object == 'driveclass':
                drive_class = json.loads(nvmesh.get_drive_class(args.name[0]))
                if len(drive_class) == 0:
                    print(formatter.yellow(
                        "%s is not a valid drive class name. A drive class with this name doesn't exist."
                        % args.name[0]))
                    return
                else:
                    self.poutput(update_drive_class(drive_class[0],
                                                    args.drive,
                                                    args.description,
                                                    args.file))
        cli_exit.validate_exit()

    evict_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    evict_parser.add_argument('-d', '--drive', nargs='+', required=True,
                              help="The drive ID of the drive to evict.")
    evict_parser.add_argument('-y', '--yes', required=False, action='store_const', const=True,
                              help="Automatically answer 'yes' and skip operational warnings.")

    @with_argparser(evict_parser)
    @with_category("NVMesh Resource Management")
    def do_evict(self, args):
        """Evict a drive in the NVMesh cluster."""
        try:
            if args.yes:
                self.poutput(manage_drive('evict', args.drive, None))
            else:
                if 'y' in raw_input(WARNINGS['evict_drive']):
                    self.poutput(manage_drive('evict', args.drive, None))
        except Exception, e:
            print(formatter.red("Error: " + e.message))
            logging.critical(e.message)
            cli_exit.error = True

    format_parser = argparse.ArgumentParser(formatter_class=ArgsUsageOutputFormatter)
    format_parser.add_argument('-d', '--drive', nargs='+', required=True,
                               help="The drive ID or space separated list of drive IDs to be formatted.")
    format_parser.add_argument('-f', '--format', nargs=1, required=True,
                               help="The format to be used. Valid options are: 'legacy' for NVMesh RAID-0, 1, 10, and "
                                    "Concatenated volumes, and 'ec' to support the new NVMesh distributed EC parity "
                                    "feature.")
    format_parser.add_argument('-y', '--yes', required=False, action='store_const', const=True,
                               help="Automatically answer 'yes' and skip operational warnings.")

    @with_argparser(format_parser)
    @with_category("NVMesh Resource Management")
    def do_format(self, args):
        """Format a drive in the NVMesh cluster."""
        try:
            if args.yes:
                self.poutput(manage_drive('format', args.drive, args.format[0]))
            else:
                if 'y' in raw_input(WARNINGS['format_drive']):
                    self.poutput(manage_drive('format', args.drive, args.format[0]))
        except Exception, e:
            print(formatter.red("Error: " + e.message))
            logging.critical(e.message)
            cli_exit.error = True

    def do_exit(self, _):
        exit()


def get_api_ready():
    user.get_api_user()
    nvmesh.user_name = user.API_user_name
    nvmesh.password = user.API_password
    urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
    manager_list = mgmt.get_management_server_list()
    for manager in manager_list:
        nvmesh.server = manager.strip()
        try:
            nvmesh.login()
            return 0
        except Exception, e:
            if len(manager_list) < 2:
                message = "\n".join(["Cannot log into management server %s!" % manager.strip(),
                                     "Currently defined servers in the cli tool:",
                                     "\n".join(sorted(open(ManagementServer().server_file).read().splitlines()))])
                logging.critical("\n".join([message, str(e.message)]))
                print(formatter.red(message))
                cli_exit.error = True
                cli_exit.validate_exit()
                return 1
            else:
                if manager_list.index(manager) + 1 == len(manager_list):
                    message = "\n".join(["Cannot log into any management server as defined in the nvmesh cli list! "
                                         "Use 'define manager' to update and correct the list of management servers to "
                                         "be used by the cli tool.", "Currently defined servers in the cli tool:",
                                         "\n".join(sorted(open(ManagementServer().server_file).read().splitlines()))])
                    logging.critical("\n".join([message, str(e.message)]))
                    print(formatter.red(message))
                    cli_exit.error = True
                    cli_exit.validate_exit()
                    return 1
                message = "Cannot log into management server %s, Trying the next one in the list." % manager.strip()
                print(formatter.yellow(message))
                logging.warning("\n".join([message, str(e.message)]))
                continue


def show_cluster(csv_format, json_format):
    try:
        if get_api_ready() == 0:
            cluster_json = json.loads(nvmesh.get_cluster())
            capacity_json = json.loads(nvmesh.get_space_allocation())
            total_server = cluster_json['servers']['totalServers']
            offline_server = cluster_json['servers']['offlineServers']
            total_clients = cluster_json['clients']['totalClients']
            offline_clients = cluster_json['clients']['offlineClients']
            cluster_volumes = []
            cluster_list = []
            for volume, count in cluster_json['volumes'].items():
                cluster_volumes.append(' '.join([repr(count), volume]))
            cluster_list.append([total_server, offline_server, total_clients, offline_clients,
                                 '; '.join(cluster_volumes),
                                 humanfriendly.format_size(capacity_json['totalCapacityInBytes'], binary=True),
                                 humanfriendly.format_size(capacity_json['availableSpaceInBytes'], binary=True)])
            if csv_format is True:
                return formatter.print_tsv(cluster_list)
            elif json_format is True:
                return formatter.print_json(cluster_list)
            else:
                return format_smart_table(cluster_list,
                                          ['Total Servers',
                                           'Offline Servers',
                                           'Total Clients',
                                           'Offline Clients',
                                           'Volumes',
                                           'Total Capacity',
                                           'Available Space'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_target(details, csv_format, json_format, server, short):
    try:
        if get_api_ready() == 0:
            target_json = json.loads(nvmesh.get_servers())
            target_list = []
            for target in target_json:
                if server is not None and target['node_id'].split('.')[0] not in server:
                    continue
                else:
                    if short is True:
                        target_name = target['node_id'].split('.')[0]
                    else:
                        target_name = target['node_id']
                    target_disk_list = []
                    target_nic_list = []
                    if target["health"] == "healthy":
                        health = formatter.green(formatter.bold("Healthy ")) + u'\u2705'
                    else:
                        health = formatter.red(formatter.bold("Critical ")) + u'\u274C'
                    for disk in target['disks']:
                        target_disk_list.append(disk['diskID'])
                    if details is True:
                        server_details = json.loads(nvmesh.get_server_by_id(target['node_id']))
                        for nic in server_details['nics']:
                            if nic['status'].lower() == "ok":
                                nic_status = formatter.green("OK")
                            elif nic['status'].lower() == "missing":
                                nic_status = formatter.red("Missing!")
                            else:
                                nic_status = formatter.red("Error!")
                            if 'mtu' in nic:
                                mtu = nic['mtu']
                            else:
                                mtu = "n/a"
                            if 'deviceType' in nic:
                                device = nic['deviceType']
                            else:
                                device = "n/a"

                            target_nic_list.append([nic['nicID'], nic_status, nic['protocol'], mtu, device])

                        target_list.append([target_name,
                                            health, target['version'],
                                            ' '.join(target_disk_list),
                                            format_smart_table(target_nic_list, ["NIC ID",
                                                                                 "Status",
                                                                                 "Protocol",
                                                                                 "MTU",
                                                                                 "Device"])])
                    else:
                        target_list.append([target_name, health, target['version']])
            if details is True:
                if csv_format is True:
                    return formatter.print_tsv(target_list)
                elif json_format is True:
                    formatter.print_json(target_list)
                    return
                else:
                    return format_smart_table(sorted(target_list),
                                              ['Target Name',
                                               'Target Health',
                                               'NVMesh Version',
                                               'Target Disks',
                                               'Target NICs'])
            else:
                if csv_format is True:
                    return formatter.print_tsv(target_list)
                elif json_format is True:
                    return formatter.print_json(target_list)
                else:
                    return format_smart_table(sorted(target_list), ['Target Name',
                                                                    'Target Health',
                                                                    'NVMesh Version'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def get_target_list(short):
    try:
        if get_api_ready() == 0:
            target_json = json.loads(nvmesh.get_servers())
            target_list = []
            for target in target_json:
                if short:
                    target_list.append(target['node_id'].split('.')[0])
                else:
                    target_list.append(target['node_id'])
            return target_list
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def get_client_list(full):
    try:
        if get_api_ready() == 0:
            clients_json = json.loads(nvmesh.get_clients())
            client_list = []
            for client in clients_json:
                if full is True:
                    client_list.append(client['client_id'])
                else:
                    client_list.append(client['client_id'].split('.')[0])
            return client_list
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def get_volume_list():
    try:
        if get_api_ready() == 0:
            volume_json = json.loads(nvmesh.get_volumes())
            volume_list = []
            for volume in volume_json:
                volume_list.append(volume['_id'].split('.')[0])
            return volume_list
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def get_drive_class_list():
    try:
        if get_api_ready() == 0:
            drive_class_list = []
            drive_class_json = json.loads(nvmesh.get_disk_classes())
            for drive_class in drive_class_json:
                drive_class_list.append(drive_class["_id"])
            return drive_class_list
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def get_target_class_list():
    try:
        if get_api_ready() == 0:
            target_class_list = []
            target_class_json = json.loads(nvmesh.get_target_classes())
            for target_class in target_class_json:
                target_class_list.append(target_class["_id"])
            return target_class_list
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_manager():
    try:
        if get_api_ready() == 0:
            manager_list = []
            manager_json = json.loads(nvmesh.get_managers())
            for manager in manager_json:
                manager_list.append([
                    manager["hostname"],
                    manager["ip"],
                    u'\N{check mark}' if "isMe" in manager else " ",
                    u'\N{check mark}' if manager["useSSL"] else " ",
                    manager["port"],
                    manager["outbound_socket_status"] if "isMe" not in manager else "n/a",
                    manager["inbound_socket_status"] if "isMe" not in manager else "n/a"
                ])
            return format_smart_table(sorted(manager_list), [
                "Manager",
                "IP",
                "Current Connection",
                "Use SSL",
                "Port",
                "Outbound Socket",
                "Inbound Socket"])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def get_manager_list(short):
    try:
        if get_api_ready() == 0:
            manager_list = []
            manager_json = json.loads(nvmesh.get_managers())
            for manager in manager_json:
                if short:
                    manager_list.append(manager["hostname"].split(".")[0])
                else:
                    manager_list.append(manager["hostname"])
            return sorted(manager_list) if manager_list is not None else None
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_clients(csv_format, json_format, server, short):
    try:
        if get_api_ready() == 0:
            clients_json = json.loads(nvmesh.get_clients())
            client_list = []
            for client in clients_json:
                if server is not None and client['client_id'].split('.')[0] not in server:
                    continue
                else:
                    volume_list = []
                    if client["health"] == "healthy":
                        health = formatter.green(formatter.bold("Healthy ")) + u'\u2705'
                    else:
                        health = formatter.red(formatter.bold("Critical ")) + u'\u274C'
                    if short is True:
                        client_name = client['client_id'].split('.')[0]
                    else:
                        client_name = client['client_id']
                    for volume in client['block_devices']:
                        if volume['vol_status'] == 4:
                            volume_list.append(volume['name'])
                    client_list.append(
                        [client_name, health, client['version'], ' '.join(sorted(set(volume_list)))])
            if csv_format is True:
                return formatter.print_tsv(client_list)
            elif json_format is True:
                return formatter.print_json(client_list)
            else:
                return format_smart_table(sorted(client_list),
                                          ['Client Name',
                                           'Client Health',
                                           'Client Version',
                                           'Client Volumes'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_volumes(details, csv_format, json_format, volumes, short, layout):
    try:
        if get_api_ready() == 0:
            volumes_json = json.loads(nvmesh.get_volumes())
            volumes_list = []
            for volume in volumes_json:
                remaining_dirty_bits = 0
                name = formatter.bold(volume["name"])
                if volume["health"] == "healthy":
                    health = formatter.green(formatter.bold("Healthy"))
                    status = formatter.green(formatter.bold(volume["status"].capitalize()))
                elif volume["health"] == "alarm":
                    health = formatter.yellow(formatter.bold("Alarm"))
                    status = formatter.yellow(formatter.bold(volume["status"].capitalize()))
                else:
                    health = formatter.red(formatter.bold("Critical"))
                    status = formatter.red(formatter.bold(volume["status"].capitalize()))

                if volumes is not None and volume['name'] not in volumes:
                    continue
                else:
                    if 'stripeWidth' in volume:
                        stripe_width = volume['stripeWidth']
                    else:
                        stripe_width = None
                    if 'domain' in volume:
                        awareness_domain = volume['domain']
                    else:
                        awareness_domain = None
                    if 'serverClasses' in volume:
                        if len(volume['serverClasses']) > 0:
                            target_classes_list = volume['serverClasses']
                        else:
                            target_classes_list = None
                    else:
                        target_classes_list = None

                    if 'diskClasses' in volume:
                        if len(volume['diskClasses']) > 0:
                            drive_classes_list = volume['diskClasses']
                        else:
                            drive_classes_list = None
                    else:
                        drive_classes_list = None
                    if 'dataBlocks' in volume:
                        data_blocks = str(volume['dataBlocks'])
                    if 'parityBlocks' in volume:
                        parity_blocks = str(volume['parityBlocks'])
                    if volume['RAIDLevel'].lower() == "erasure coding":
                        parity_info = "+".join([data_blocks, parity_blocks])
                        protection_level = volume['protectionLevel']
                        stripe_width = "n/a"
                    else:
                        parity_info = "n/a"
                        protection_level = "n/a"

                    target_list = []
                    target_disk_list = []
                    chunk_count = 0
                    volume_layout_list = []

                    if layout:
                        for chunk in volume['chunks']:
                            for praid in chunk['pRaids']:
                                for segment in praid['diskSegments']:
                                    volume_layout_list.append([str(chunk_count),
                                                               str(praid['stripeIndex']),
                                                               str(segment['pRaidIndex']),
                                                               segment['type'],
                                                               str(segment['lbs']) if segment['lbs'] != 0 else "n/a",
                                                               str(segment['lbe']) if segment['lbe'] != 0 else "n/a",
                                                               u'\u274C' if segment['isDead'] is True else u'\u2705',
                                                               segment['diskID'],
                                                               segment['node_id']])
                            chunk_count += 1

                    for chunk in volume['chunks']:
                        for praid in chunk['pRaids']:
                            for segment in praid['diskSegments']:
                                if segment['type'] == 'raftonly':
                                    continue
                                else:
                                    if "remainingDirtyBits" in segment:
                                        remaining_dirty_bits = remaining_dirty_bits + segment['remainingDirtyBits']
                                    target_disk_list.append(segment['diskID'])
                                    if short is True:
                                        target_list.append(segment['node_id'].split('.')[0])
                                    else:
                                        target_list.append(segment['node_id'])

                    if details is True and not layout:
                        volumes_list.append([name,
                                             health,
                                             status if remaining_dirty_bits == 0 else " ".join([
                                                 status, str(
                                                     100 - ((remaining_dirty_bits * 4096) * 100 / (int(volume['blocks'])
                                                     * int(volume['blockSize'])))) + "%"]),
                                             volume['RAIDLevel'],
                                             parity_info,
                                             protection_level,
                                             humanfriendly.format_size((int(volume['blocks'])
                                                                        * int(volume['blockSize'])), binary=True),
                                             stripe_width if stripe_width is not None else "n/a",
                                             humanfriendly.format_size((remaining_dirty_bits * 4096), binary=True),
                                             ' '.join(set(target_list)),
                                             ' '.join(set(target_disk_list)),
                                             ' '.join(target_classes_list) if target_classes_list is not None
                                             else "n/a",
                                             ' '.join(drive_classes_list) if drive_classes_list is not None else "n/a",
                                             awareness_domain if awareness_domain is not None else "n/a"])

                    elif details is True and layout:
                        volumes_list.append([name,
                                             health,
                                             status if remaining_dirty_bits == 0 else " ".join([
                                                 status, str(
                                                     100 - ((remaining_dirty_bits * 4096) * 100 / (int(volume['blocks'])
                                                                                                   * int(
                                                                 volume['blockSize'])))) + "%"]),
                                             volume['RAIDLevel'],
                                             parity_info,
                                             protection_level,
                                             humanfriendly.format_size((int(volume['blocks'])
                                                                        * int(volume['blockSize'])), binary=True),
                                             stripe_width if stripe_width is not None else "n/a",
                                             humanfriendly.format_size((remaining_dirty_bits * 4096), binary=True),
                                             ' '.join(set(target_list)),
                                             ' '.join(set(target_disk_list)),
                                             ' '.join(target_classes_list) if target_classes_list is not None
                                             else "n/a",
                                             ' '.join(drive_classes_list) if drive_classes_list is not None else "n/a",
                                             awareness_domain if awareness_domain is not None else "n/a",
                                             format_smart_table(volume_layout_list, ["Chunk",
                                                                                     "Stripe",
                                                                                     "Segment",
                                                                                     "Type",
                                                                                     "LBA Start",
                                                                                     "LBA End",
                                                                                     "Status",
                                                                                     "Disk ID",
                                                                                     "Last Known Target"])])
                    else:
                        volumes_list.append([name,
                                             health,
                                             status if remaining_dirty_bits == 0 else " ".join([
                                                 status, str(
                                                     100 - ((remaining_dirty_bits * 4096) * 100 / (int(volume['blocks'])
                                                                                                   * int(
                                                                 volume['blockSize'])))) + "%"]),
                                             volume['RAIDLevel'],
                                             parity_info,
                                             protection_level,
                                             humanfriendly.format_size((int(volume['blocks'])
                                                                        * int(volume['blockSize'])), binary=True),
                                             stripe_width if stripe_width is not None else "n/a",
                                             humanfriendly.format_size((remaining_dirty_bits * 4096), binary=True)])
            if details is True and not layout:
                if csv_format is True:
                    return formatter.print_tsv(volumes_list)
                elif json_format is True:
                    return formatter.print_json(volumes_list)
                else:
                    return format_smart_table(sorted(volumes_list),
                                              ['Volume Name',
                                               'Volume Health',
                                               'Volume Status',
                                               'Volume Type',
                                               'Parity Info',
                                               'Protection Level',
                                               'Volume Size',
                                               'Stripe Width',
                                               'Dirty Bits',
                                               'Target Names',
                                               'Target Disks',
                                               'Target Classes',
                                               'Drive Classes',
                                               'Awareness/Domain'])
            elif details is True and layout:
                if csv_format is True:
                    return formatter.print_tsv(volumes_list)
                elif json_format is True:
                    return formatter.print_json(volumes_list)
                else:
                    return format_smart_table(sorted(volumes_list),
                                              ['Volume Name',
                                               'Volume Health',
                                               'Volume Status',
                                               'Volume Type',
                                               'Parity Info',
                                               'Protection Level',
                                               'Volume Size',
                                               'Stripe Width',
                                               'Dirty Bits',
                                               'Target Names',
                                               'Target Disks',
                                               'Target Classes',
                                               'Drive Classes',
                                               'Awareness/Domain',
                                               'Volume Layout'])
            else:
                if csv_format is True:
                    return formatter.print_tsv(volumes_list)
                elif json_format is True:
                    return formatter.print_json(volumes_list)
                else:
                    return format_smart_table(sorted(volumes_list),
                                              ['Volume Name',
                                               'Volume Health',
                                               'Volume Status',
                                               'Volume Type',
                                               'Parity Info',
                                               'Protection Level',
                                               'Volume Size',
                                               'Stripe Width',
                                               'Dirty Bits'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_vpgs(csv_format, json_format, vpgs):
    try:
        if get_api_ready() == 0:
            vpgs_json = json.loads(nvmesh.get_vpgs())
            vpgs_list = []
            for vpg in vpgs_json:
                server_classes_list = []
                disk_classes_list = []
                if vpgs is not None and vpg['name'] not in vpgs:
                    continue
                else:
                    vpg_description = vpg['description'] if 'description' in vpg else " "
                    if 'stripeWidth' not in vpg:
                        vpg_stripe_width = ''
                    else:
                        vpg_stripe_width = vpg['stripeWidth']
                    for disk_class in vpg['diskClasses']:
                        disk_classes_list.append(disk_class)
                    for server_class in vpg['serverClasses']:
                        server_classes_list.append(server_class)

                vpgs_list.append(
                    [vpg['name'],
                     vpg_description,
                     vpg['RAIDLevel'],
                     vpg_stripe_width,
                     humanfriendly.format_size(vpg['capacity'], binary=True),
                     '; '.join(disk_classes_list),
                     '; '.join(server_classes_list)])
            if csv_format is True:
                return formatter.print_tsv(vpgs_list)
            elif json_format is True:
                return formatter.print_json(vpgs_list)
            else:
                return format_smart_table(vpgs_list, ['VPG Name',
                                                      'Description',
                                                      'RAID Level',
                                                      'Stripe Width',
                                                      'Reserved Capacity',
                                                      'Disk Classes',
                                                      'Target Classes'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_drive_classes(details, csv_format, json_format, classes):
    try:
        if get_api_ready() == 0:
            drive_classes_json = json.loads(nvmesh.get_disk_classes())
            drive_class_list = []
            for drive_class in drive_classes_json:
                drive_model_list = []
                drive_target_list = []
                domain_list = []
                if classes is not None and drive_class['_id'] not in classes:
                    continue
                else:
                    if 'domains' in drive_class:
                        for domain in drive_class['domains']:
                            domain_list.append("scope:" + domain['scope'] + " identifier:" + domain['identifier'])
                    else:
                        domain_list = None
                    for disk in drive_class['disks']:
                        drive_model_list.append(disk['model'])
                        if disk["disks"]:
                            for drive in disk['disks']:
                                if details is True:
                                    drive_target_list.append(' '.join([drive['diskID'],
                                                                       drive['node_id']]))
                                else:
                                    drive_target_list.append(drive['diskID'])
                        else:
                            drive_target_list = []
                    drive_class_list.append([drive_class['_id'],
                                             '; '.join(drive_model_list),
                                             '; '.join(drive_target_list),
                                             '; '.join(domain_list) if domain_list is not None else "n/a"])
            if csv_format is True:
                return formatter.print_tsv(drive_class_list)
            elif json_format is True:
                return formatter.print_json(drive_class_list)
            else:
                return format_smart_table(drive_class_list, ['Drive Class',
                                                             'Drive Model',
                                                             'Drive Details',
                                                             'Awareness/Domains'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_logs(all_logs):
    try:
        if get_api_ready() == 0:
            logs_list = []
            logs_json = json.loads(nvmesh.get_logs(all_logs))
            for log_entry in logs_json:
                if log_entry["level"] == "ERROR":
                    logs_list.append(
                        "\t".join([str(dateutil.parser.parse(log_entry["timestamp"])),
                                   formatter.red(log_entry["level"]),
                                   log_entry["message"]]))
                elif log_entry["level"] == "WARNING":
                    logs_list.append(
                        "\t".join([str(dateutil.parser.parse(log_entry["timestamp"])),
                                   formatter.yellow(log_entry["level"]),
                                   log_entry["message"]]).strip())
                else:
                    logs_list.append(
                        "\t".join(
                            [str(dateutil.parser.parse(log_entry["timestamp"])),
                             log_entry["level"],
                             log_entry["message"]]).strip())
            return "\n".join(logs_list)
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def show_target_classes(csv_format, json_format, classes):
    try:
        if get_api_ready() == 0:
            target_classes_json = json.loads(nvmesh.get_target_classes())
            target_classes_list = []
            for target_class in target_classes_json:
                if classes is not None and target_class['_id'] not in classes:
                    continue
                else:
                    target_nodes = []
                    domain_list = []
                    if 'domains' in target_class:
                        for domain in target_class['domains']:
                            domain_list.append("scope:" + domain['scope'] + " identifier:" + domain['identifier'])
                    else:
                        domain_list = None
                    if 'description' not in target_class:
                        target_class_description = "n/a"
                    else:
                        target_class_description = target_class['description']
                    for node in target_class['targetNodes']:
                        target_nodes.append(node)

                target_classes_list.append([target_class['name'],
                                            target_class_description,
                                            '; '.join(target_nodes),
                                            '; '.join(domain_list) if domain_list is not None else "n/a"])
            if csv_format is True:
                return formatter.print_tsv(target_classes_list)
            elif json_format is True:
                return formatter.print_json(target_classes_list)
            else:
                return format_smart_table(target_classes_list, ['Target Class',
                                                                'Description',
                                                                'Target Nodes',
                                                                'Awareness/Domains'])
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def count_active_targets():
    try:
        active_targets = 0
        for target in get_target_list(short=True):
            ssh = SSHRemoteOperations()
            ssh_return = ssh.return_remote_command_std_output(target, "/etc/init.d/nvmeshtarget status")
            if ssh_return[0] == 0:
                active_targets += 1
        return active_targets
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def parse_domain_args(args_list):
    if args_list is None:
        return None
    else:
        domain_list = []
        domain_dict = {}
        for line in args_list:
            domain_dict["scope"] = line.split("&")[0].split(":")[1]
            domain_dict["identifier"] = line.split("&")[1].split(":")[1]
            domain_list.append(domain_dict)
        return domain_list


def parse_drive_args(args_drive_list):
    try:
        if args_drive_list is None:
            return None
        drive_list = []
        for drive in args_drive_list:
            drive_list.append(
                {
                    "diskID": drive.split(":")[0],
                    "node_id": drive.split(":")[1].strip()
                }
            )
        return drive_list
    except Exception, e:
        cli_exit.error = True
        logging.critical(e.message)
        print(formatter.red("Error: " + e.message))


def manage_nvmesh_service(scope, details, servers, action, prefix, parallel, graceful):
    output = []
    ssh = SSHRemoteOperations()
    host_list = []
    ssh_return = []

    if servers is not None:
        host_list = set(servers)

    else:
        if scope == 'cluster':
            host_list = get_target_list(short=True)
            host_list.extend(get_client_list(False))
            host_list.extend(mgmt.get_management_server_list())
        if scope == 'target':
            host_list = get_target_list(short=True)
        if scope == 'client':
            host_list = get_client_list(False)
        if scope == 'mgr':
            if action is not "start":
                host_list = get_manager_list(short=True)
            else:
                host_list = ManagementServer().get_management_server_list()

    if host_list is None:
        error_message = "Cannot get server/client list and/or verify NVMesh manager from NVMesh management!"
        logging.critical(error_message)
        print(formatter.red(error_message))
        cli_exit.error = True
        return

    if scope == "target":
        if action == "stop" and servers is None and graceful:
            nvmesh.target_cluster_shutdown({"control": "shutdownAll"})
            print("\n".join(["Shutting down the NVMesh target services in the cluster.", "Please wait..."]))
            while count_active_targets() != 0:
                time.sleep(5)
            print(" ".join(["All target services shut down.", formatter.green("OK")]))
            return

    if parallel:
        if host_list and len(host_list) > 0:
            process_pool = Pool(len(set(host_list)))
        else:
            return
        parallel_execution_map = []
        for host in set(host_list):
            if action == "check":
                parallel_execution_map.append([host, "/opt/NVMesh/%s*/services/nvmesh%s status" % (scope[0], scope)])
            elif action == "start":
                parallel_execution_map.append([host, "/opt/NVMesh/%s*/services/nvmesh%s start" % (scope[0], scope)])
            elif action == "stop":
                parallel_execution_map.append([host, "/opt/NVMesh/%s*/services/nvmesh%s stop" % (scope[0], scope)])
            elif action == "restart":
                parallel_execution_map.append([host, "/opt/NVMesh/%s*/services/nvmesh%s restart" % (scope[0], scope)])

        command_return_list = process_pool.map(run_parallel_ssh_command, parallel_execution_map)
        process_pool.close()
        for command_return in command_return_list:
            try:
                if command_return[1][0] == 0:
                    if details is True:
                        output.append(formatter.bold(" ".join([command_return[0],
                                                               action.capitalize(),
                                                               formatter.green('OK')])))
                        if prefix is True:
                            output.append(formatter.add_line_prefix(command_return[0], (
                                command_return[1][1][:command_return[1][1].rfind('\n')]), True) + "\n")
                        else:
                            output.append((command_return[1][1][:command_return[1][1].rfind('\n')] + "\n"))
                    else:
                        output.append(" ".join([command_return[0],
                                                action.capitalize(),
                                                formatter.green('OK')]))
                else:
                    cli_exit.error = True
                    if details is True:
                        output.append(formatter.bold(" ".join([command_return[0],
                                                               action.capitalize(),
                                                               formatter.red('Failed')])))
                        if prefix is True:
                            output.append(formatter.add_line_prefix(command_return[0], (
                                command_return[1][1]) + "\n", True))
                        else:
                            output.append(command_return[1][1] + "\n")
                    else:
                        output.append(" ".join([command_return[0],
                                                action.capitalize(),
                                                formatter.red('Failed')]))
            except Exception, e:
                logging.critical(e.message)
                return "Error"
        return "\n".join(output)

    else:
        for server in host_list:
            if action == "check":
                ssh_return = ssh.return_remote_command_std_output(server,
                                                                  "/opt/NVMesh/%s*/services/nvmesh%s status" % (
                                                                      scope[0], scope))
            elif action == "start":
                ssh_return = ssh.return_remote_command_std_output(server,
                                                                  "/opt/NVMesh/%s*/services/nvmesh%s start" % (
                                                                      scope[0], scope))
            elif action == "stop":
                ssh_return = ssh.return_remote_command_std_output(server,
                                                                  "/opt/NVMesh/%s*/services/nvmesh%s stop" % (
                                                                      scope[0], scope))
            elif action == "restart":
                ssh_return = ssh.return_remote_command_std_output(server,
                                                                  "/opt/NVMesh/%s*/services/nvmesh%s restart" % (
                                                                      scope[0], scope))
            if ssh_return:
                if ssh_return[0] == 0:
                    if details is True:
                        output.append(' '.join([formatter.bold(server),
                                                action.capitalize(),
                                                formatter.green('OK')]))
                        if prefix is True:
                            output.append(formatter.add_line_prefix(server,
                                                                    (ssh_return[1]), True))
                        else:
                            output.append((ssh_return[1] + "\n"))
                    else:
                        output.append(" ".join([server,
                                                action.capitalize(),
                                                formatter.green('OK')]))
                else:
                    cli_exit.error = True
                    if details is True:
                        output.append(' '.join([formatter.bold(server),
                                                action.capitalize(),
                                                formatter.red('Failed')]))
                        if prefix is True:
                            output.append(formatter.add_line_prefix(server,
                                                                    (ssh_return[1] if not None else None), True))
                        else:
                            output.append((ssh_return[1] if not None else None + "\n"))
                    else:
                        output.append(" ".join([server,
                                                action.capitalize(),
                                                formatter.red('Failed')]))
            else:
                cli_exit.error = True
                output.append(" ".join([server,
                                        action.capitalize(),
                                        formatter.red('Failed')]))
        return "\n".join(output)


def attach_detach_volumes(action, clients, volumes):
    try:
        process_pool = Pool(len(clients))
        parallel_execution_map = []
        command_return_list = []
        if action == 'attach':
            for client in clients:
                command_line = " ".join(['nvmesh_attach_volumes', " ".join(volumes)])
                parallel_execution_map.append([str(client), str(command_line)])
            command_return_list = process_pool.map(run_parallel_ssh_command,
                                                   parallel_execution_map)
            process_pool.close()
        elif action == 'detach':
            for client in clients:
                command_line = " ".join(['nvmesh_detach_volumes', " ".join(volumes)])
                parallel_execution_map.append([str(client), str(command_line)])
            command_return_list = process_pool.map(run_parallel_ssh_command,
                                                   parallel_execution_map)
            process_pool.close()
        output = []
        for command_return in command_return_list:
            if command_return[0] != 0:
                cli_exit.error = True
            output.append(formatter.add_line_prefix(command_return[0],
                                                    command_return[1][1],
                                                    False))
        return "\n".join(output)
    except Exception, e:
        print(formatter.red("Error: " + e.message))
        logging.critical(e.message)
        cli_exit.error = True
        cli_exit.validate_exit()


def manage_mcm(clients, action):
    ssh = SSHRemoteOperations()
    try:
        if clients is not None:
            client_list = clients
        else:
            client_list = get_client_list(False)
        for client in client_list:
            if action == "stop":
                ssh.execute_remote_command(client, "/opt/NVMesh/client-repo/management_cm/managementCMClient.py stop")
                print client, "\tStopped the MangaementCM services."
            elif action == "start":
                ssh.execute_remote_command(client, "/opt/NVMesh/client-repo/management_cm/managementCMClient.py start")
                print client, "\tStarted the MangaementCM services."
            elif action == "restart":
                ssh.execute_remote_command(client, "/opt/NVMesh/client-repo/management_cm/managementCMClient.py")
                print client, "\tRestarted the MangaementCM services."
    except Exception, e:
        print(formatter.red("Error: " + e.message))
        logging.critical(e.message)
        cli_exit.error = True
        cli_exit.validate_exit()


def manage_cluster(details, action, prefix):
    try:
        if action == "check":
            print("Checking the NVMesh managers ...")
            NvmeshShell().poutput(manage_nvmesh_service('mgr', details, None, action, prefix, True, None))
            print("Checking the NVMesh targets ...")
            NvmeshShell().poutput(manage_nvmesh_service('target', details, None, action, prefix, True, None))
            print("Checking the NVMesh clients ...")
            NvmeshShell().poutput(manage_nvmesh_service('client', details, None, action, prefix, True, None))
        elif action == "start":
            print ("Starting the NVMesh managers ...")
            NvmeshShell().poutput(manage_nvmesh_service('mgr', details, None, action, prefix, True, None))
            time.sleep(3)
            print ("Starting the NVMesh targets ...")
            NvmeshShell().poutput(manage_nvmesh_service('target', details, None, action, prefix, True, None))
            print ("Starting the NVMesh clients ...")
            NvmeshShell().poutput(manage_nvmesh_service('client', details, None, action, prefix, True, None))
        elif action == "stop":
            print ("Stopping the NVMesh clients ...")
            NvmeshShell().poutput(manage_nvmesh_service('client', details, None, action, prefix, True, None))
            print ("Stopping the NVMesh targets ...")
            NvmeshShell().poutput(manage_nvmesh_service('target', details, None, action, prefix, True, True))
            print ("Stopping the NVMesh managers ...")
            NvmeshShell().poutput(manage_nvmesh_service('mgr', details, None, action, prefix, True, None))
        elif action == "restart":
            print ("Stopping the NVMesh clients ...")
            NvmeshShell().poutput(manage_nvmesh_service('client', details, None, 'stop', prefix, True, None))
            print ("Stopping the NVMesh targets ...")
            NvmeshShell().poutput(manage_nvmesh_service('target', details, None, 'stop', prefix, True, True))
            print ("Restarting the NVMesh managers ...")
            NvmeshShell().poutput(manage_nvmesh_service('mgr', details, None, 'restart', prefix, True, None))
            time.sleep(3)
            print ("Starting the NVMesh targets ...")
            NvmeshShell().poutput(manage_nvmesh_service('target', details, None, 'start', prefix, True, None))
            print ("Starting the NVMesh clients ...")
            NvmeshShell().poutput(manage_nvmesh_service('client', details, None, 'start', prefix, True, None))
    except Exception, e:
        print(formatter.red("Error: " + e.message))
        logging.critical(e.message)
        cli_exit.error = True
        cli_exit.validate_exit()


def run_parallel_ssh_command(argument):
    ssh = SSHRemoteOperations()
    try:
        output = ssh.return_remote_command_std_output(argument[0], argument[1])
        if output:
            if output[0] != 0:
                cli_exit.error = True
            return argument[0], output
        else:
            cli_exit.error = True
            return argument[0], [1, "Failed on %s" % argument[0]]
    except Exception, e:
        print(formatter.red("Error: " + e.message))
        logging.critical(e.message)
        cli_exit.error = True
        cli_exit.validate_exit()


def manage_volume(action, name, capacity, description, disk_classes, server_classes, limit_by_nodes, limit_by_disks,
                  awareness, raid_level, stripe_width, vpg, force, ec_parity, ec_node_redundancy):
    if get_api_ready() == 0:
        api_payload = {}
        payload = {}
        if action == "create":
            payload = {
                "name": name,
                "capacity": "MAX" if str(capacity[0]).upper() == "MAX" else int(humanfriendly.parse_size(capacity[0],
                                                                                                         binary=True)),
            }
            if description is not None:
                payload["description"] = description[0]
            if disk_classes is not None:
                payload["diskClasses"] = disk_classes
            if server_classes is not None:
                payload["serverClasses"] = server_classes
            else:
                payload["serverClasses"] = []
            if limit_by_nodes is not None:
                payload["limitByNodes"] = limit_by_nodes
            else:
                payload["limitByNodes"] = []
            if limit_by_disks is not None:
                payload["limitByDisks"] = limit_by_disks
            else:
                payload["limitByDisks"] = []
            if awareness is not None:
                payload["domain"] = awareness[0]
            if raid_level is not None and vpg is None:
                payload["RAIDLevel"] = RAID_LEVELS[raid_level[0]]
                if raid_level[0] == "lvm":
                    pass
                if raid_level[0] == "con":
                    pass
                elif raid_level[0] == "0":
                    payload["stripeSize"] = 32
                    payload["stripeWidth"] = int(stripe_width[0])
                elif raid_level[0] == "1":
                    payload["numberOfMirrors"] = 1
                elif raid_level[0] == "10":
                    payload["stripeSize"] = 32
                    payload["stripeWidth"] = int(stripe_width[0])
                    payload["numberOfMirrors"] = 1
                elif raid_level[0] == "ec":
                    payload['protectionLevel'] = PROTECTION_LEVELS[int(ec_node_redundancy[0])]
                    payload['dataBlocks'] = int(ec_parity[0].split('+')[0])
                    payload['parityBlocks'] = int(ec_parity[0].split('+')[1])
                    payload["stripeSize"] = 32
                    payload["stripeWidth"] = 1
            elif vpg is not None and raid_level is None:
                payload["VPG"] = vpg[0]
            api_payload["create"] = [payload]
            api_payload["remove"] = []
            api_payload["edit"] = []
            api_return = json.loads(nvmesh.manage_volume(api_payload))
            if api_return['create'][0]['success'] is True:
                return " ".join(["Volume",
                                 name,
                                 "successfully created.",
                                 formatter.green('OK')])

            else:
                cli_exit.error = True
                return " ".join(["Couldn't create volume", name,
                                 formatter.red('Failed')])

        elif action == 'remove':
            api_return = []
            output = []
            for volume in name:
                payload["_id"] = volume
                if force:
                    payload["force"] = True
                api_payload["remove"] = [payload]
                api_payload["create"] = []
                api_payload["edit"] = []
                api_return.append(json.loads(nvmesh.manage_volume(api_payload)))
            for item in api_return:
                if item['remove'][0]['success'] is True:
                    output.append(" ".join(["Volume",
                                            item['remove'][0]['id'],
                                            "successfully deleted.",
                                            formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "to delete", item['remove'][0]['id'],
                                            "-",
                                            item['remove'][0]['ex']]))
                    cli_exit.error = True
            return "\n".join(output)


def manage_vpg(action, name, capacity, description, disk_classes, server_classes, awareness, raid_level, stripe_width):
    if get_api_ready() == 0:
        api_payload = {}
        payload = {}
        if action == "save":
            payload = {
                "name": name,
                "capacity": "MAX" if str(capacity[0]).upper() == "MAX" else int(humanfriendly.parse_size(capacity[0],
                                                                                                         binary=True)),
            }
            if description is not None:
                payload["description"] = description[0]
            if disk_classes is not None:
                payload["diskClasses"] = disk_classes
            if server_classes is not None:
                payload["serverClasses"] = server_classes
            else:
                payload["serverClasses"] = []
            if awareness is not None:
                payload["domain"] = awareness[0]
            payload["RAIDLevel"] = RAID_LEVELS[raid_level[0]]
            payload["stripeWidth"] = stripe_width
            payload["stripeSize"] = 32
            payload["numberOfMirrors"] = 1
            api_return = json.loads(nvmesh.manage_vpg("save", api_payload))
            if api_return['create'][0]['success'] is True:
                return " ".join(["VPG",
                                 name,
                                 "successfully created.",
                                 formatter.green('OK')])
            else:
                cli_exit.error = True
                return " ".join(["Couldn't create vpg", name, formatter.red('Failed')])

        elif action == 'remove':
            api_return = []
            payload["_id"] = name
            api_return.append(json.loads(nvmesh.manage_volume("delete", api_payload)))
            if api_return['remove'][0]['success'] is True:
                return " ".join(["Volume", name, "successfully deleted.", formatter.green('OK')])
            else:
                cli_exit.error = True
                return " ".join([formatter.red('Failed'), "to delete", name])


def update_volume(volume, capacity, description, drives, targets, drive_classes, target_classes):
    if capacity:
        volume["capacity"] = "MAX" if str(capacity[0]).upper() == "MAX" else int(
            humanfriendly.parse_size(capacity[0], binary=True))
    if description:
        volume["description"] = " ".join(description)
    if drives:
        volume["limitByDisks"] = drives
    if targets:
        volume["limitByNodes"] = targets
    if target_classes:
        volume["serverClasses"] = target_classes
    if drive_classes:
        volume["diskClasses"] = drive_classes
    api_payload = dict()
    api_payload["remove"] = []
    api_payload["create"] = []
    api_payload["edit"] = [volume]
    api_return = json.loads(nvmesh.manage_volume(api_payload))
    if api_return["edit"][0]["success"] is True:
        output = " ".join(["Volume",
                           volume["name"],
                           "successfully updated.",
                           formatter.green('OK')])
        return output
    else:
        output = " ".join([formatter.red('Failed'),
                           "to update",
                           volume["name"]])
        cli_exit.error = True
        return output


def update_target_class(target_class, servers, description):
    if servers:
        target_class["targetNodes"] = servers
    if description:
        target_class["description"] = " ".join(description)
    api_payload = [target_class]
    api_return = json.loads(nvmesh.update_target_class(api_payload))
    print api_return
    if api_return[0]["success"] is True:
        output = " ".join(["target class",
                           target_class["name"],
                           "successfully updated.",
                           formatter.green('OK')])
        return output
    else:
        output = " ".join([formatter.red('Failed'),
                           "to update",
                           target_class["name"],
                           "-",
                           api_return[0]["err"]])
        cli_exit.error = True
        return output


def update_drive_class(drive_class, drives, description, file_path):
    if description:
        drive_class["description"] = description[0]
    if file_path:
        drive_class["disks"][0]["disks"] = parse_drive_args(open(file_path[0], 'r').readlines())
    if drives:
        drive_class["disks"][0]["disks"] = parse_drive_args(drives)
    api_payload = [drive_class]
    api_return = json.loads(nvmesh.update_drive_class(api_payload))
    if api_return[0]["success"] is True:
        output = " ".join(["Drive class",
                           drive_class["_id"],
                           "successfully updated.",
                           formatter.green('OK')])
        return output
    else:
        output = " ".join([formatter.red('Failed'),
                           "to update",
                           drive_class["_id"]])
        cli_exit.error = True
        return output


def manage_drive(action, drive, format_type):
    get_api_ready()
    if action == 'evict':
        payload = {}
        payload["Ids"] = drive
        api_payload = payload
        api_return = json.loads(nvmesh.evict_drive(api_payload))
        if api_return:
            output_list = []
            for line in api_return:
                if line['success']:
                    output = " ".join(["Drive", line['id'], "successfully evicted.", formatter.green("OK")])
                    output_list.append(output)
                else:
                    cli_exit.error = True
                    output = " ".join(["Drive", line['_id'], "not evicted!", line['err'],
                                       formatter.red("Failed")])
                    output_list.append(output)
            return "\n".join(output_list)
        else:
            cli_exit.error = True
            output = " ".join(["Drive", drive, "not evicted!", formatter.red("Failed")])
            return output
    elif action == 'delete':
        payload = {}
        payload["Ids"] = drive
        api_payload = payload
        api_return = json.loads(nvmesh.delete_drive(api_payload))
        if api_return:
            output_list = []
            for line in api_return:
                if line['success']:
                    output = " ".join(["Drive", line['id'], "successfully deleted.", formatter.green("OK")])
                    output_list.append(output)
                else:
                    cli_exit.error = True
                    output = " ".join(["Drive", line['id'], "not deleted!", line['err'],
                                       formatter.red("Failed")])
                    output_list.append(output)
            return "\n".join(output_list)
        else:
            cli_exit.error = True
            output = " ".join(["Drive", drive, "not deleted!", formatter.red("Failed")])
            return output
    elif action == 'format':
        payload = {}
        payload['formatType'] = FORMAT_TYPES[format_type]
        payload['diskIDs'] = drive
        api_return = json.loads(nvmesh.format_drive(payload))
        if api_return:
            output_list = []
            for line in api_return:
                if line['success']:
                    output = " ".join(["Drive", line['_id'], "successfully formatted.", formatter.green("OK")])
                    output_list.append(output)
                else:
                    cli_exit.error = True
                    output = " ".join(["Drive", line['_id'], "not formatted!", line['error'],
                                       formatter.red("Failed")])
                    output_list.append(output)
            return "\n".join(output_list)
        else:
            cli_exit.error = True
            output = " ".join(["Drive/s", " ".join(drive), "not formatted!", formatter.red("Failed")])
            return output


def manage_nic(action, nic_id):
    if get_api_ready() == 0:
        api_return = []
        output = []
        payload = {}
        if action == "delete":
            payload["nicID"] = nic_id.strip()

            api_return = json.loads(nvmesh.delete_nic(payload))
            if api_return:
                if api_return['success']:
                    output = " ".join(["NIC", api_return['_id'], "successfully deleted.", formatter.green("OK")])
                else:
                    cli_exit.error = True
                    output = " ".join(["NIC", api_return['_id'], "not deleted!", api_return['error'],
                                       formatter.red("Failed")])
                return output
            else:
                cli_exit.error = True
                output = " ".join(["NIC", " ".join(nic_id.strip()), "not formatted!", formatter.red("Failed")])
                return output


def manage_drive_class(action, class_list, drives, model, name, description, domains, file_path):
    if get_api_ready() == 0:
        api_return = []
        output = []
        payload = {}
        if action == "autocreate":
            model_list = get_drive_models(pretty=False)
            for model in model_list:
                drives = json.loads(nvmesh.get_disk_by_model(model[0]))
                drive_list = []
                for drive in drives:
                    drive_list.append(
                        {
                            "diskID": drive["disks"]["diskID"],
                            "node_id": drive["node_id"]
                        }
                    )
                payload["_id"] = re.sub("(?<=_)_|_(?=_)", "", model[0])
                payload["description"] = "automatically created"
                payload["disks"] = [{"model": model[0],
                                     "disks": drive_list}]
                api_payload = [payload]
                api_return.append([re.sub("(?<=_)_|_(?=_)",
                                          "",
                                          model[0]),
                                   json.dumps(nvmesh.manage_drive_class("save",
                                                                        api_payload))])
            for line in api_return:
                if "null" in line[1]:
                    output.append(" ".join(["Drive Class",
                                            line[0],
                                            "successfully created.",
                                            formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "\t",
                                            "Couldn't create Drive Class",
                                            line[0],
                                            " - ",
                                            "Check for duplicates."]))
                    cli_exit.error = True
            return "\n".join(output)
        elif action == "save":
            payload["_id"] = name[0]
            if description:
                payload["description"] = description
            if domains:
                payload["domains"] = parse_domain_args(domains)
            if file_path:
                payload["disks"] = [{"model": model[0],
                                     "disks": parse_drive_args(open(file_path[0], 'r').readlines())}]
            else:
                payload["disks"] = [{"model": model[0],
                                     "disks": parse_drive_args(drives)}]
            api_payload = [payload]
            api_return.append([name[0],
                               json.dumps(nvmesh.manage_drive_class("save", api_payload))])
            for line in api_return:
                if "null" in line[1]:
                    output.append(" ".join(["Drive Class",
                                            name[0],
                                            "successfully created.",
                                            formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "\t", "Couldn't create Drive Class",
                                            name[0],
                                            " - ",
                                            "Check for duplicates."]))
                    cli_exit.error = True
            return "\n".join(output)

        elif action == "delete":
            for drive_class in class_list:
                payload = [{"_id": drive_class}]
                return_info = json.loads(nvmesh.manage_drive_class("delete", payload))

                if return_info[0]["success"] is True:
                    output.append(
                        " ".join(["Drive Class",
                                  drive_class,
                                  "successfully deleted.",
                                  formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "\t", "Couldn't delete Drive Class.",
                                            drive_class,
                                            " - ",
                                            return_info[0]["msg"]]))
                    cli_exit.error = True
            return "\n".join(output)


def manage_target_class(action, class_list, name, servers, description, domains):
    if get_api_ready() == 0:
        api_return = []
        output = []
        payload = {}
        if action == "autocreate":
            for target in get_target_list(short=False):
                payload["name"] = target.split(".")[0]
                payload["targetNodes"] = [target]
                payload["description"] = "automatically created"
                api_payload = [payload]
                api_return.append([target.split(".")[0],
                                   json.dumps(nvmesh.manage_target_class("save", api_payload))])
            for line in api_return:
                if "null" in line[1]:
                    output.append(" ".join(["Target Class",
                                            line[0],
                                            "successfully created.",
                                            formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "\t", "Couldn't create Target Class",
                                            line[0],
                                            " - ",
                                            "Check for duplicates."]))
                    cli_exit.error = True
            return "\n".join(output)
        elif action == "delete":
            for target_class in class_list:
                payload = [{"_id": target_class}]
                return_info = json.loads(nvmesh.manage_target_class("delete", payload))

                if return_info[0]["success"] is True:
                    output.append(
                        " ".join(["Target Class",
                                  target_class,
                                  "successfully deleted.",
                                  formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "\t",
                                            "Couldn't delete Target Class",
                                            target_class,
                                            " - ",
                                            return_info[0]["msg"]]))
                    cli_exit.error = True
            return "\n".join(output)
        elif action == "save":
            payload["name"] = name
            if description is not None:
                payload["description"] = description
            payload["targetNodes"] = servers
            if domains is not None:
                payload["domains"] = domains
            api_payload = [payload]
            api_return.append([name, json.dumps(nvmesh.manage_target_class("save", api_payload))])
            for line in api_return:
                if "null" in line[1]:
                    output.append(" ".join(["Target Class",
                                            line[0],
                                            "successfully created.",
                                            formatter.green('OK')]))
                else:
                    output.append(" ".join([formatter.red('Failed'),
                                            "\t", "Couldn't create Target Class",
                                            line[0],
                                            " - ",
                                            "Check for duplicates."]))
                    cli_exit.error = True
            return "\n".join(output)


def show_drives(details, targets, tsv):
    if get_api_ready() == 0:
        drive_list = []
        target_list = get_target_list(short=False)
        for target in target_list:
            if targets is not None and target.split('.')[0] not in targets:
                continue
            else:
                target_details = json.loads(nvmesh.get_server_by_id(target))
                for disk in target_details['disks']:
                    if disk['isExcluded']:
                        pass
                    else:
                        vendor = disk['Vendor'] if not str(disk['Vendor']).lower() in NVME_VENDORS else \
                            NVME_VENDORS[str(disk['Vendor']).lower()]
                        if disk["status"].lower() == "ok":
                            status = u'\u2705'
                        elif disk["status"].lower() == "not_initialized":
                            status = formatter.yellow("Not Initialized")
                            drive_format = "n/a"
                        elif disk["status"].lower() == "initializing":
                            status = "Initializing - %s%%" % (disk['nZeroedBlks'] * 100 / disk['availableBlocks'])
                        else:
                            status = u'\u274C'
                        if 'metadata_size' in disk:
                            if int(disk['metadata_size']) == 8:
                                ec_support = "Yes"
                            else:
                                ec_support = "No"
                        else:
                            ec_support = "n/a"
                        if 'metadata_size' in disk:
                            if disk["status"].lower() != "not_initialized":
                                if disk['metadata_size'] > 0:
                                    drive_format = "EC"
                                else:
                                    drive_format = "Legacy"
                        else:
                            drive_format = "n/a"
                        if 'isOutOfService' in disk:
                            in_service = formatter.red("No")
                            status = "n/a"
                        else:
                            in_service = formatter.green("Yes")
                        if details:
                            drive_list.append([vendor,
                                               disk['Model'],
                                               disk['diskID'],
                                               humanfriendly.format_size((disk['block_size'] * disk['blocks']),
                                                                         binary=True),
                                               status,
                                               in_service,
                                               ec_support,
                                               drive_format,
                                               humanfriendly.format_size(disk['block_size'], binary=True),
                                               " ".join([str(100 - int((disk['Available_Spare'].split("_")[0]))), "%"]),
                                               target,
                                               disk['Numa_Node'],
                                               disk['Submission_Queues']])
                        else:
                            drive_list.append([vendor,
                                               re.sub("(?<=_)_|_(?=_)", "", disk['Model']),
                                               disk['diskID'],
                                               humanfriendly.format_size((disk['block_size'] * disk['blocks']),
                                                                         binary=True),
                                               status,
                                               in_service,
                                               ec_support,
                                               drive_format,
                                               target])
        if tsv:
            return formatter.print_tsv(drive_list)
        if details:
            return format_smart_table(sorted(drive_list),
                                      ['Vendor',
                                       'Model',
                                       'Drive ID',
                                       'Size',
                                       'Status',
                                       'In Service',
                                       'EC Support',
                                       'Format',
                                       'Sector Size',
                                       'Wear',
                                       'Target',
                                       'Numa',
                                       'QPs'])
        else:
            return format_smart_table(sorted(drive_list), ['Vendor',
                                                           'Model',
                                                           'Drive ID',
                                                           'Size',
                                                           'Status',
                                                           'In Service',
                                                           'EC Support',
                                                           'Format',
                                                           'Target'])


def show_drive_models(details):
    if not details:
        return format_smart_table(get_drive_models(pretty=True), ["Drive Model", "Drives"])
    else:
        return format_smart_table(get_drive_models(pretty=False), ["Drive Model", "Drives"])


def get_drive_models(pretty):
    if get_api_ready() == 0:
        model_list = []
        json_drive_models = json.loads(nvmesh.get_disk_models())
        for model in json_drive_models:
            if pretty:
                model_list.append([re.sub("(?<=_)_|_(?=_)", "", model["_id"]), model["available"]])
            else:
                model_list.append([model["_id"], model["available"]])
        return model_list


def start_shell():
    reload(sys)
    sys.setdefaultencoding('utf-8')
    history_file = os.path.expanduser('~/.nvmesh_shell_history')
    if not os.path.exists(history_file):
        with open(history_file, "w") as history:
            history.write("")
    readline.read_history_file(history_file)
    atexit.register(readline.write_history_file, history_file)
    shell = NvmeshShell()
    if os.path.exists(os.path.expanduser('~/.nvmesh_cli_ack')):
        pass
    else:
        print("Before using this software, please read and acknowledge the licensing terms and agreement.")
        if 'y' in raw_input("Do you want to proceed? [Yes/No]: ").lower():
            NvmeshShell().ppaged(__license__)
            if 'y' in raw_input("\nDo you agree to the licensing terms? [Yes/No]: ").lower():
                ack = open(os.path.expanduser('~/.nvmesh_cli_ack'), 'w')
                ack.write(str(""))
                ack.close()
            else:
                print("Good bye.")
                exit(0)
        else:
            print("Good bye.")
            exit(0)

    if len(sys.argv) > 1:
        cli_exit.is_interactive = False
        shell.onecmd(' '.join(sys.argv[1:]))
    else:
        cli_exit.is_interactive = True
        shell.cmdloop('''
Copyright (c) 2018 Excelero, Inc. All rights reserved.

This program comes with ABSOLUTELY NO WARRANTY; for licensing and warranty details type 'show license'.
This is free software, and you are welcome to redistribute it under certain conditions; type ' show license' for 
details.

Starting the NVMesh CLI - version 1.3 - build %s ...''' % __version__)


if __name__ == '__main__':
    start_shell()