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backport.py
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backport.py
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#!/usr/bin/env python
# (c) 2017, Brian Coca <bcoca@ansible.com>
#
# Ansible 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.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import distutils.spawn
import optparse
from operator import attrgetter
from ansible.cli import CLI
from ansible.errors import AnsibleOptionsError
from ansible.parsing.dataloader import DataLoader
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
INTERNAL_VARS = frozenset([ 'ansible_facts',
'ansible_version',
'ansible_playbook_python',
'inventory_dir',
'inventory_file',
'inventory_hostname',
'inventory_hostname_short',
'groups',
'group_names',
'omit',
'playbook_dir',
])
class InventoryCLI(CLI):
''' used to display or dump the configured inventory as Ansible sees it '''
ARGUMENTS = { 'host': 'The name of a host to match in the inventory, relevant when using --list',
'group': 'The name of a group in the inventory, relevant when using --graph',
}
def __init__(self, args):
super(InventoryCLI, self).__init__(args)
self.args = args
self.vm = None
self.loader = None
self.inventory = None
self._new_api = True
def parse(self):
self.parser = CLI.base_parser(
usage='usage: %prog [options] [host|group]',
epilog='Show Ansible inventory information, by default it uses the inventory script JSON format',
inventory_opts=True,
vault_opts=True
)
self.parser.add_option("--optimize", action="store_true", default=False, dest='optimize',
help='Output variables on the group or host where they are defined')
# Actions
action_group = optparse.OptionGroup(self.parser, "Actions", "One of following must be used on invocation, ONLY ONE!")
action_group.add_option("--list", action="store_true", default=False, dest='list', help='Output all hosts info, works as inventory script')
action_group.add_option("--host", action="store", default=None, dest='host', help='Output specific host info, works as inventory script')
action_group.add_option("--graph", action="store_true", default=False, dest='graph',
help='create inventory graph, if supplying pattern it must be a valid group name')
self.parser.add_option_group(action_group)
# Options
self.parser.add_option("-y", "--yaml", action="store_true", default=False, dest='yaml',
help='Use YAML format instead of default JSON, ignored for --graph')
self.parser.add_option("--vars", action="store_true", default=False, dest='show_vars',
help='Add vars to graph display, ignored unless used with --graph')
try:
super(InventoryCLI, self).parse()
except Exception as e:
if 'Need to implement!' not in e.args[0]:
raise
# --- Start of 2.3+ super(InventoryCLI, self).parse() ---
self.options, self.args = self.parser.parse_args(self.args[1:])
# --- End of 2.3+ super(InventoryCLI, self).parse() ---
display.verbosity = self.options.verbosity
self.validate_conflicts(vault_opts=True)
# there can be only one! and, at least, one!
used = 0
for opt in (self.options.list, self.options.host, self.options.graph):
if opt:
used += 1
if used == 0:
raise AnsibleOptionsError("No action selected, at least one of --host, --graph or --list needs to be specified.")
elif used > 1:
raise AnsibleOptionsError("Conflicting options used, only one of --host, --graph or --list can be used at the same time.")
# set host pattern to default if not supplied
if len(self.args) > 0:
self.options.pattern = self.args[0]
else:
self.options.pattern = 'all'
def run(self):
results = None
super(InventoryCLI, self).run()
# Initialize needed objects
if getattr(self, '_play_prereqs', False):
self.loader, self.inventory, self.vm = self._play_prereqs(self.options)
else:
# fallback to pre 2.4 way of initialzing
from ansible.vars import VariableManager
from ansible.inventory import Inventory
self._new_api = False
self.loader = DataLoader()
self.vm = VariableManager()
# use vault if needed
if self.options.vault_password_file:
vault_pass = CLI.read_vault_password_file(self.options.vault_password_file, loader=self.loader)
elif self.options.ask_vault_pass:
vault_pass = self.ask_vault_passwords()
else:
vault_pass = None
if vault_pass:
self.loader.set_vault_password(vault_pass)
# actually get inventory and vars
self.inventory = Inventory(loader=self.loader, variable_manager=self.vm, host_list=self.options.inventory)
self.vm.set_inventory(self.inventory)
if self.options.host:
hosts = self.inventory.get_hosts(self.options.host)
if len(hosts) != 1:
raise AnsibleOptionsError("You must pass a single valid host to --hosts parameter")
myvars = self._get_host_variables(host=hosts[0])
self._remove_internal(myvars)
# FIXME: should we template first?
results = self.dump(myvars)
elif self.options.graph:
results = self.inventory_graph()
elif self.options.list:
top = self._get_group('all')
if self.options.yaml:
results = self.yaml_inventory(top)
else:
results = self.json_inventory(top)
results = self.dump(results)
if results:
# FIXME: pager?
display.display(results)
exit(0)
exit(1)
def dump(self, stuff):
if self.options.yaml:
import yaml
from ansible.parsing.yaml.dumper import AnsibleDumper
results = yaml.dump(stuff, Dumper=AnsibleDumper, default_flow_style=False)
else:
import json
results = json.dumps(stuff, sort_keys=True, indent=4)
return results
def _get_host_variables(self, host):
if self._new_api:
hostvars = self.vm.get_vars(host=host)
else:
hostvars = self.vm.get_vars(self.loader, host=host)
return hostvars
def _get_group(self, gname):
if self._new_api:
group = self.inventory.groups.get(gname)
else:
group = self.inventory.get_group(gname)
return group
def _remove_internal(self, dump):
for internal in INTERNAL_VARS:
if internal in dump:
del dump[internal]
def _remove_empty(self, dump):
# remove empty keys
for x in ('hosts', 'vars', 'children'):
if x in dump and not dump[x]:
del dump[x]
def _show_vars(self, dump, depth):
result = []
self._remove_internal(dump)
if self.options.show_vars:
for (name, val) in sorted(dump.items()):
result.append(self._graph_name('{%s = %s}' % (name, val), depth + 1))
return result
def _graph_name(self, name, depth=0):
if depth:
name = " |" * (depth) + "--%s" % name
return name
def _graph_group(self, group, depth=0):
result = [self._graph_name('@%s:' % group.name, depth)]
depth = depth + 1
for kid in sorted(group.child_groups, key=attrgetter('name')):
result.extend(self._graph_group(kid, depth))
if group.name != 'all':
for host in sorted(group.hosts, key=attrgetter('name')):
result.append(self._graph_name(host.name, depth))
result.extend(self._show_vars(host.get_vars(), depth))
result.extend(self._show_vars(group.get_vars(), depth))
return result
def inventory_graph(self):
start_at = self._get_group(self.options.pattern)
if start_at:
return '\n'.join(self._graph_group(start_at))
else:
raise AnsibleOptionsError("Pattern must be valid group name when using --graph")
def json_inventory(self, top):
def format_group(group):
results = {}
results[group.name] = {}
if group.name != 'all':
results[group.name]['hosts'] = [h.name for h in sorted(group.hosts, key=attrgetter('name'))]
results[group.name]['vars'] = group.get_vars()
results[group.name]['children'] = []
for subgroup in sorted(group.child_groups, key=attrgetter('name')):
results[group.name]['children'].append(subgroup.name)
results.update(format_group(subgroup))
self._remove_empty(results[group.name])
return results
results = format_group(top)
# populate meta
results['_meta'] = {'hostvars': {}}
hosts = self.inventory.get_hosts()
for host in hosts:
results['_meta']['hostvars'][host.name] = self._get_host_variables(host=host)
self._remove_internal(results['_meta']['hostvars'][host.name])
return results
def yaml_inventory(self, top):
seen = []
def format_group(group):
results = {}
# initialize group + vars
results[group.name] = {}
results[group.name]['vars'] = group.get_vars()
# subgroups
results[group.name]['children'] = {}
for subgroup in sorted(group.child_groups, key=attrgetter('name')):
if subgroup.name != 'all':
results[group.name]['children'].update(format_group(subgroup))
# hosts for group
results[group.name]['hosts'] = {}
if group.name != 'all':
for h in sorted(group.hosts, key=attrgetter('name')):
myvars = {}
if h.name not in seen: # avoid defining host vars more than once
seen.append(h.name)
myvars = self._get_host_variables(host=h)
self._remove_internal(myvars)
results[group.name]['hosts'][h.name] = myvars
self._remove_empty(results[group.name])
return results
return format_group(top)
if __name__ == '__main__':
import imp
import sys
with open(__file__) as f:
imp.load_source('ansible.cli.inventory', __file__ + '.py', f)
ansible_path = distutils.spawn.find_executable('ansible')
sys.argv[0] = 'ansible-inventory'
execfile(ansible_path)