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#!/usr/bin/python -tt
# This file is part of Ansible
#
# 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/>.

DOCUMENTATION = '''
---
module: ec2_create
short_description: create an instance in ec2, return instanceid
description:
- creates ec2 instances and optionally waits for it to be 'running'
version_added: "0.9"
options:
keypair:
description:
- keypair to use on the instance
required: true
default: null
aliases: []
group:
description:
- security group(s) to use on the instance
- for cloud systems supporting more than one group separate the groups with a comma
required: false
default: 'default'
aliases: []
instance_type:
description:
- instance type to use for the instance
required: true
default: null
aliases: []
image:
description:
- emi (or ami) to use for the instance
required: true
default: null
aliases: []
kernel:
description:
- kernel eki to use for the instance
required: false
default: null
aliases: []
ramdisk:
description:
- ramdisk eri to use for the instance
required: false
default: null
aliases: []
wait:
description:
- wait for the instance to be in state 'running' before returning
required: False
default: False
aliases: []
ec2_url:
description:
- url to use to connect to ec2 or your cloud
required: False
default: null
aliases: []
ec2_secret_key:
description:
- ec2 secret key
required: False
default: null
aliases: []
ec2_access_key:
description:
- ec2 access key
required: False
default: null
aliases: []
examples:
- code: "local_action: ec2_create keypair=admin instance_type=m1.large image=emi-40603AD1 wait=true group=webserver"
description: "Examples from Ansible Playbooks"
- code:
requirements: [ "euca2ools" ]
author: Seth Vidal

'''

import euca2ools.commands.euca.runinstances
import time

def _run(cmd):
    # returns (rc, stdout, stderr) from shell command
    process = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE, shell=True)
    stdout, stderr = process.communicate()
    return (process.returncode, stdout, stderr)


def main():
    module = AnsibleModule(
        argument_spec = dict(
            keypair = dict(required=True),
            group = dict(default='default'),
            instance_type = dict(aliases=['type']),
            image = dict(required=True),
            kernel = dict(),
            #count = dict(default='1'), # maybe someday
            ramdisk = dict(),
            wait = dict(choices=BOOLEANS, default=False),
            ec2_url = dict(aliases=['EC2_URL']),
            ec2_secret_key = dict(aliases=['EC2_SECRET_KEY']),
            ec2_access_key = dict(aliases=['EC2_ACCESS_KEY']),
        )
    )

    keypair = module.params.get('keypair')
    group = module.params.get('group')
    groups = group.split(',')
    instance_type = module.params.get('instance_type')
    image = module.params.get('image')
    #count = module.params.get('count')
    kernel = module.params.get('kernel')
    ramdisk = module.params.get('ramdisk')
    wait = module.params.get('wait')
    ec2_url = module.params.get('ec2_url')
    ec2_secret_key = module.params.get('ec2_secret_key')
    ec2_access_key = module.params.get('ec2_access_key')
    
    if ec2_url:
        os.environ['EC2_URL'] = ec2_url
    if ec2_secret_key:
        os.environ['EC2_SECRET_KEY'] = ec2_secret_key
    if ec2_access_key:
        os.environ['EC2_ACCESS_KEY'] = ec2_access_key

        
    # yes I recognize how hacky this is - but it is easier than rewriting
    # all the try/except's myself.
    sys.argv.append(image)
    eri = euca2ools.commands.euca.runinstances.RunInstances()
    conn = eri.make_connection()
    res = eri.make_request_cli(conn, 'run_instances',
                               image_id=image,
                               min_count=1,
                               max_count=1,
                               key_name=keypair,
                               security_groups=groups,
                               instance_type=instance_type,
                               kernel_id=kernel,
                               ramdisk_id=ramdisk)

    instids = [ i.id for i in res.instances ]

    res_list = res.connection.get_all_instances(instids)
    this_res = res_list[0]
    if wait:
        # wait here until the instances are up
        num_running = 0
        while num_running != len(instids):
            res_list = res.connection.get_all_instances(instids)
            this_res = res_list[0]
            num_running = len([ i for i in this_res.instances if i.state=='running' ])
            time.sleep(2)
    
    # there's only one - but maybe one day there could be more
    instances = []
    for inst in this_res.instances:
        d = {
           'id': inst.id,
           'public_ip': inst.ip_address,
            }
        instances.append(d)

    result = {"changed": True,
              "instances": instances }
    module.exit_json(**result)

# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>

main()
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