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342 lines
13 KiB
Python
342 lines
13 KiB
Python
#!/usr/bin/python
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = """
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---
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module: ec2_asg
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short_description: Create or delete AWS Autoscaling Groups
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description:
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- Can create or delete AWS Autoscaling Groups
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- Works with the ec2_lc module to manage Launch Configurations
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version_added: "1.6"
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author: Gareth Rushgrove
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options:
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state:
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description:
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- register or deregister the instance
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required: true
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choices: ['present', 'absent']
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name:
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description:
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- Unique name for group to be created or deleted
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required: true
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load_balancers:
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description:
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- List of ELB names to use for the group
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required: false
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availability_zones:
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description:
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- List of availability zone names in which to create the group. Defaults to all the availability zones in the region if vpc_zone_identifier is not set.
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required: false
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launch_config_name:
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description:
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- Name of the Launch configuration to use for the group. See the ec2_lc module for managing these.
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required: false
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min_size:
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description:
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- Minimum number of instances in group
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required: false
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max_size:
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description:
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- Maximum number of instances in group
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required: false
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desired_capacity:
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description:
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- Desired number of instances in group
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required: false
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region:
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description:
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- The AWS region to use. If not specified then the value of the EC2_REGION environment variable, if any, is used.
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required: false
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aliases: ['aws_region', 'ec2_region']
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vpc_zone_identifier:
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description:
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- List of VPC subnets to use
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required: false
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default: None
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tags:
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description:
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- A list of tags to add to the Auto Scale Group. Optional key is 'propagate_at_launch', which defaults to true.
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required: false
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default: None
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version_added: "1.7"
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health_check_period:
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description:
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- Length of time in seconds after a new EC2 instance comes into service that Auto Scaling starts checking its health.
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required: false
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default: 500 seconds
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version_added: "1.7"
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health_check_type:
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description:
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- The service you want the health status from, Amazon EC2 or Elastic Load Balancer.
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required: false
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default: EC2
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version_added: "1.7"
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choices: ['EC2', 'ELB']
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extends_documentation_fragment: aws
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"""
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EXAMPLES = '''
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- ec2_asg:
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name: special
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load_balancers: 'lb1,lb2'
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availability_zones: 'eu-west-1a,eu-west-1b'
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launch_config_name: 'lc-1'
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min_size: 1
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max_size: 10
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desired_capacity: 5
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vpc_zone_identifier: 'subnet-abcd1234,subnet-1a2b3c4d'
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tags:
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- environment: production
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propagate_at_launch: no
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deprecated method of expressing tags:
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tags:
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- key: environment
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value: production
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propagate_at_launch: no
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'''
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import sys
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import time
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from ansible.module_utils.basic import *
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from ansible.module_utils.ec2 import *
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try:
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import boto.ec2.autoscale
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from boto.ec2.autoscale import AutoScaleConnection, AutoScalingGroup, Tag
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from boto.exception import BotoServerError
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except ImportError:
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print "failed=True msg='boto required for this module'"
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sys.exit(1)
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ASG_ATTRIBUTES = ('availability_zones', 'default_cooldown', 'desired_capacity',
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'health_check_period', 'health_check_type', 'launch_config_name',
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'load_balancers', 'max_size', 'min_size', 'name', 'placement_group',
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'tags', 'termination_policies', 'vpc_zone_identifier')
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def enforce_required_arguments(module):
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''' As many arguments are not required for autoscale group deletion
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they cannot be mandatory arguments for the module, so we enforce
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them here '''
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missing_args = []
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for arg in ('min_size', 'max_size', 'launch_config_name'):
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if module.params[arg] is None:
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missing_args.append(arg)
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if missing_args:
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module.fail_json(msg="Missing required arguments for autoscaling group create/update: %s" % ",".join(missing_args))
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def get_properties(autoscaling_group):
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properties = dict((attr, getattr(autoscaling_group, attr)) for attr in ASG_ATTRIBUTES)
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if autoscaling_group.instances:
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properties['instances'] = [i.instance_id for i in autoscaling_group.instances]
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properties['load_balancers'] = autoscaling_group.load_balancers
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return properties
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def create_autoscaling_group(connection, module):
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group_name = module.params.get('name')
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load_balancers = module.params['load_balancers']
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availability_zones = module.params['availability_zones']
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launch_config_name = module.params.get('launch_config_name')
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min_size = module.params['min_size']
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max_size = module.params['max_size']
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desired_capacity = module.params.get('desired_capacity')
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vpc_zone_identifier = module.params.get('vpc_zone_identifier')
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set_tags = module.params.get('tags')
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health_check_period = module.params.get('health_check_period')
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health_check_type = module.params.get('health_check_type')
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as_groups = connection.get_all_groups(names=[group_name])
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if not vpc_zone_identifier and not availability_zones:
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region, ec2_url, aws_connect_params = get_aws_connection_info(module)
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try:
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ec2_connection = connect_to_aws(boto.ec2, region, **aws_connect_params)
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except boto.exception.NoAuthHandlerFound, e:
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module.fail_json(msg=str(e))
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asg_tags = []
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for tag in set_tags:
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if tag.has_key('key') and tag.has_key('value'): # this block is to support depricated form
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asg_tags.append(Tag(key=tag.get('key'),
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value=tag.get('value'),
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propagate_at_launch=bool(tag.get('propagate_at_launch', True)),
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resource_id=group_name))
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else:
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for k,v in tag.iteritems():
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if k !='propagate_at_launch':
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asg_tags.append(Tag(key=k,
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value=v,
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propagate_at_launch=bool(tag.get('propagate_at_launch', True)),
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resource_id=group_name))
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if not as_groups:
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if not vpc_zone_identifier and not availability_zones:
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availability_zones = module.params['availability_zones'] = [zone.name for zone in ec2_connection.get_all_zones()]
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enforce_required_arguments(module)
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launch_configs = connection.get_all_launch_configurations(names=[launch_config_name])
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ag = AutoScalingGroup(
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group_name=group_name,
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load_balancers=load_balancers,
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availability_zones=availability_zones,
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launch_config=launch_configs[0],
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min_size=min_size,
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max_size=max_size,
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desired_capacity=desired_capacity,
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vpc_zone_identifier=vpc_zone_identifier,
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connection=connection,
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tags=asg_tags,
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health_check_period=health_check_period,
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health_check_type=health_check_type)
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try:
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connection.create_auto_scaling_group(ag)
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asg_properties = get_properties(ag)
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module.exit_json(changed=True, **asg_properties)
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except BotoServerError, e:
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module.fail_json(msg=str(e))
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else:
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as_group = as_groups[0]
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changed = False
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for attr in ASG_ATTRIBUTES:
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if module.params.get(attr) and getattr(as_group, attr) != module.params.get(attr):
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changed = True
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setattr(as_group, attr, module.params.get(attr))
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if len(set_tags) > 0:
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existing_tags = as_group.tags
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existing_tag_map = dict((tag.key, tag) for tag in existing_tags)
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for tag in set_tags:
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if tag.has_key('key') and tag.has_key('value'): # this is to support deprecated method
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if 'key' not in tag:
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continue
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if ( not tag['key'] in existing_tag_map or
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existing_tag_map[tag['key']].value != tag['value'] or
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('propagate_at_launch' in tag and
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existing_tag_map[tag['key']].propagate_at_launch != tag['propagate_at_launch']) ):
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changed = True
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continue
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else:
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for k,v in tag.iteritems():
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if k !='propagate_at_launch':
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if ( not k in existing_tag_map or
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existing_tag_map[k].value != v or
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('propagate_at_launch' in tag and
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existing_tag_map[k].propagate_at_launch != tag['propagate_at_launch']) ):
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changed = True
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continue
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if changed:
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connection.create_or_update_tags(asg_tags)
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# handle loadbalancers separately because None != []
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load_balancers = module.params.get('load_balancers') or []
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if load_balancers and as_group.load_balancers != load_balancers:
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changed = True
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as_group.load_balancers = module.params.get('load_balancers')
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try:
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if changed:
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as_group.update()
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asg_properties = get_properties(as_group)
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module.exit_json(changed=changed, **asg_properties)
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except BotoServerError, e:
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module.fail_json(msg=str(e))
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result = as_groups[0]
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module.exit_json(changed=changed, name=result.name,
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autoscaling_group_arn=result.autoscaling_group_arn,
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availability_zones=result.availability_zones,
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created_time=str(result.created_time),
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default_cooldown=result.default_cooldown,
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health_check_period=result.health_check_period,
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health_check_type=result.health_check_type,
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instance_id=result.instance_id,
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instances=[instance.instance_id for instance in result.instances],
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launch_config_name=result.launch_config_name,
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load_balancers=result.load_balancers,
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min_size=result.min_size, max_size=result.max_size,
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placement_group=result.placement_group,
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tags=result.tags,
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termination_policies=result.termination_policies,
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vpc_zone_identifier=result.vpc_zone_identifier)
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def delete_autoscaling_group(connection, module):
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group_name = module.params.get('name')
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groups = connection.get_all_groups(names=[group_name])
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if groups:
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group = groups[0]
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group.max_size = 0
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group.min_size = 0
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group.desired_capacity = 0
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group.update()
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instances = True
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while instances:
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tmp_groups = connection.get_all_groups(names=[group_name])
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if tmp_groups:
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tmp_group = tmp_groups[0]
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if not tmp_group.instances:
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instances = False
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time.sleep(10)
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group.delete()
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module.exit_json(changed=True)
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else:
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module.exit_json(changed=False)
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def main():
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argument_spec = ec2_argument_spec()
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argument_spec.update(
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dict(
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name=dict(required=True, type='str'),
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load_balancers=dict(type='list'),
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availability_zones=dict(type='list'),
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launch_config_name=dict(type='str'),
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min_size=dict(type='int'),
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max_size=dict(type='int'),
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desired_capacity=dict(type='int'),
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vpc_zone_identifier=dict(type='str'),
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state=dict(default='present', choices=['present', 'absent']),
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tags=dict(type='list', default=[]),
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health_check_period=dict(type='int', default=300),
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health_check_type=dict(default='EC2', choices=['EC2', 'ELB']),
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)
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)
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module = AnsibleModule(argument_spec=argument_spec)
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state = module.params.get('state')
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region, ec2_url, aws_connect_params = get_aws_connection_info(module)
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try:
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connection = connect_to_aws(boto.ec2.autoscale, region, **aws_connect_params)
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if not connection:
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module.fail_json(msg="failed to connect to AWS for the given region: %s" % str(region))
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except boto.exception.NoAuthHandlerFound, e:
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module.fail_json(msg=str(e))
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if state == 'present':
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create_autoscaling_group(connection, module)
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elif state == 'absent':
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delete_autoscaling_group(connection, module)
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main()
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