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#!/usr/bin/python
# 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_asg
short_description: Create or delete AWS Autoscaling Groups
description:
- Can create or delete AWS Autoscaling Groups
- Works with the ec2_lc module to manage Launch Configurations
version_added: "1.6"
author: Gareth Rushgrove
options:
state:
description:
- register or deregister the instance
required: true
choices: ['present', 'absent']
name:
description:
- Unique name for group to be created or deleted
required: true
load_balancers:
description:
- List of ELB names to use for the group
required: false
availability_zones:
description:
- List of availability zone names in which to create the group. Required if vpc_zone_identifier is not set.
required: false
launch_config_name:
description:
- Name of the Launch configuration to use for the group. See the ec2_lc module for managing these.
required: false
min_size:
description:
- Minimum number of instances in group
required: false
max_size:
description:
- Maximum number of instances in group
required: false
desired_capacity:
description:
- Desired number of instances in group
required: false
region:
description:
- The AWS region to use. If not specified then the value of the EC2_REGION environment variable, if any, is used.
required: false
aliases: ['aws_region', 'ec2_region']
vpc_zone_identifier:
description:
- List of VPC subnets to use
required: false
default: None
extends_documentation_fragment: aws
"""
EXAMPLES = '''
- ec2_asg:
name: special
load_balancers: 'lb1,lb2'
availability_zones: 'eu-west-1a,eu-west-1b'
launch_config_name: 'lc-1'
min_size: 1
max_size: 10
desired_capacity: 5
vpc_zone_identifier: 'subnet-abcd1234,subnet-1a2b3c4d'
'''
import sys
import time
from ansible.module_utils.basic import *
from ansible.module_utils.ec2 import *
try:
import boto.ec2.autoscale
from boto.ec2.autoscale import AutoScaleConnection, AutoScalingGroup
from boto.exception import BotoServerError
except ImportError:
print "failed=True msg='boto required for this module'"
sys.exit(1)
def enforce_required_arguments(module):
''' As many arguments are not required for autoscale group deletion
they cannot be mandatory arguments for the module, so we enforce
them here '''
missing_args = []
for arg in ('min_size', 'max_size', 'launch_config_name'):
if module.params[arg] is None:
missing_args.append(arg)
if missing_args:
module.fail_json(msg="Missing required arguments for autoscaling group create/update: %s" % ",".join(missing_args))
def create_autoscaling_group(connection, module):
enforce_required_arguments(module)
group_name = module.params.get('name')
load_balancers = module.params['load_balancers']
availability_zones = module.params['availability_zones']
launch_config_name = module.params.get('launch_config_name')
min_size = module.params['min_size']
max_size = module.params['max_size']
desired_capacity = module.params.get('desired_capacity')
vpc_zone_identifier = module.params.get('vpc_zone_identifier')
launch_configs = connection.get_all_launch_configurations(names=[launch_config_name])
as_groups = connection.get_all_groups(names=[group_name])
if not vpc_zone_identifier and not availability_zones:
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
try:
ec2_connection = connect_to_aws(boto.ec2, region, **aws_connect_params)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg=str(e))
module.params['availability_zones'] = [zone.name for zone in ec2_connection.get_all_zones()]
if not as_groups:
ag = AutoScalingGroup(
group_name=group_name,
load_balancers=load_balancers,
availability_zones=availability_zones,
launch_config=launch_configs[0],
min_size=min_size,
max_size=max_size,
desired_capacity=desired_capacity,
vpc_zone_identifier=vpc_zone_identifier,
connection=connection)
try:
connection.create_auto_scaling_group(ag)
module.exit_json(changed=True)
except BotoServerError, e:
module.fail_json(msg=str(e))
else:
as_group = as_groups[0]
changed = False
for attr in ('launch_config_name', 'max_size', 'min_size', 'desired_capacity',
'vpc_zone_identifier', 'availability_zones'):
if getattr(as_group, attr) != module.params.get(attr):
changed = True
setattr(as_group, attr, module.params.get(attr))
# handle loadbalancers separately because None != []
load_balancers = module.params.get('load_balancers') or []
if as_group.load_balancers != load_balancers:
changed = True
as_group.load_balancers = module.params.get('load_balancers')
try:
if changed:
as_group.update()
module.exit_json(changed=changed)
except BotoServerError, e:
module.fail_json(msg=str(e))
def delete_autoscaling_group(connection, module):
group_name = module.params.get('name')
groups = connection.get_all_groups(names=[group_name])
if groups:
group = groups[0]
group.shutdown_instances()
instances = True
while instances:
connection.get_all_groups()
for group in groups:
if group.name == group_name:
if not group.instances:
instances = False
time.sleep(10)
group.delete()
module.exit_json(changed=True)
else:
module.exit_json(changed=False)
def main():
argument_spec = ec2_argument_spec()
argument_spec.update(
dict(
name=dict(required=True, type='str'),
load_balancers=dict(type='list'),
availability_zones=dict(type='list'),
launch_config_name=dict(type='str'),
min_size=dict(type='int'),
max_size=dict(type='int'),
desired_capacity=dict(type='int'),
vpc_zone_identifier=dict(type='str'),
state=dict(default='present', choices=['present', 'absent']),
)
)
module = AnsibleModule(argument_spec=argument_spec)
state = module.params.get('state')
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
try:
connection = connect_to_aws(boto.ec2.autoscale, region, **aws_connect_params)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg=str(e))
if state == 'present':
create_autoscaling_group(connection, module)
elif state == 'absent':
delete_autoscaling_group(connection, module)
main()
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