Merge pull request #598 from wimnat/feature/ec2_vpc_subnet
Feature/ec2 vpc subnet
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Brian Coca
commit
a0558a90b2
1 changed files with 272 additions and 0 deletions
272
cloud/amazon/ec2_vpc_subnet.py
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272
cloud/amazon/ec2_vpc_subnet.py
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#!/usr/bin/python
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#
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# This is a 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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# This Ansible library 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 this library. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: ec2_vpc_subnet
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short_description: Manage subnets in AWS virtual private clouds
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description:
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- Manage subnets in AWS virtual private clouds
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version_added: "2.0"
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author: Robert Estelle (@erydo)
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options:
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az:
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description:
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- "The availability zone for the subnet. Only required when state=present."
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required: false
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default: null
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cidr:
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description:
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- "The CIDR block for the subnet. E.g. 10.0.0.0/16. Only required when state=present."
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required: false
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default: null
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tags:
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description:
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- "A dict of tags to apply to the subnet. Any tags currently applied to the subnet and not present here will be removed."
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required: false
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default: null
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aliases: [ 'resource_tags' ]
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state:
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description:
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- "Create or remove the subnet"
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required: false
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default: present
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choices: [ 'present', 'absent' ]
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vpc_id:
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description:
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- "VPC ID of the VPC in which to create the subnet."
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required: false
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default: null
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extends_documentation_fragment: aws
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'''
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EXAMPLES = '''
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# Note: These examples do not set authentication details, see the AWS Guide for details.
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- name: Create subnet for database servers
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ec2_vpc_subnet:
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state: present
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vpc_id: vpc-123456
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cidr: 10.0.1.16/28
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resource_tags:
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Name: Database Subnet
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register: database_subnet
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- name: Remove subnet for database servers
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ec2_vpc_subnet:
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state: absent
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vpc_id: vpc-123456
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cidr: 10.0.1.16/28
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'''
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import sys # noqa
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import time
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try:
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import boto.ec2
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import boto.vpc
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from boto.exception import EC2ResponseError
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HAS_BOTO = True
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except ImportError:
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HAS_BOTO = False
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if __name__ != '__main__':
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raise
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class AnsibleVPCSubnetException(Exception):
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pass
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class AnsibleVPCSubnetCreationException(AnsibleVPCSubnetException):
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pass
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class AnsibleVPCSubnetDeletionException(AnsibleVPCSubnetException):
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pass
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class AnsibleTagCreationException(AnsibleVPCSubnetException):
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pass
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def get_subnet_info(subnet):
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subnet_info = { 'id': subnet.id,
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'availability_zone': subnet.availability_zone,
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'available_ip_address_count': subnet.available_ip_address_count,
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'cidr_block': subnet.cidr_block,
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'default_for_az': subnet.defaultForAz,
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'map_public_ip_on_launch': subnet.mapPublicIpOnLaunch,
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'state': subnet.state,
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'tags': subnet.tags,
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'vpc_id': subnet.vpc_id
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}
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return subnet_info
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def subnet_exists(vpc_conn, subnet_id):
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filters = {'subnet-id': subnet_id}
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subnet = vpc_conn.get_all_subnets(filters=filters)
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if subnet[0].state == "available":
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return subnet[0]
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else:
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return False
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def create_subnet(vpc_conn, vpc_id, cidr, az, check_mode):
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try:
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new_subnet = vpc_conn.create_subnet(vpc_id, cidr, az, dry_run=check_mode)
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# Sometimes AWS takes its time to create a subnet and so using
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# new subnets's id to do things like create tags results in
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# exception. boto doesn't seem to refresh 'state' of the newly
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# created subnet, i.e.: it's always 'pending'.
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subnet = False
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while subnet is False:
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subnet = subnet_exists(vpc_conn, new_subnet.id)
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time.sleep(0.1)
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except EC2ResponseError as e:
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if e.error_code == "DryRunOperation":
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subnet = None
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else:
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raise AnsibleVPCSubnetCreationException(
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'Unable to create subnet {0}, error: {1}'.format(cidr, e))
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return subnet
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def get_resource_tags(vpc_conn, resource_id):
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return dict((t.name, t.value) for t in
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vpc_conn.get_all_tags(filters={'resource-id': resource_id}))
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def ensure_tags(vpc_conn, resource_id, tags, add_only, check_mode):
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try:
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cur_tags = get_resource_tags(vpc_conn, resource_id)
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if cur_tags == tags:
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return {'changed': False, 'tags': cur_tags}
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to_delete = dict((k, cur_tags[k]) for k in cur_tags if k not in tags)
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if to_delete and not add_only:
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vpc_conn.delete_tags(resource_id, to_delete, dry_run=check_mode)
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to_add = dict((k, tags[k]) for k in tags if k not in cur_tags)
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if to_add:
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vpc_conn.create_tags(resource_id, to_add, dry_run=check_mode)
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latest_tags = get_resource_tags(vpc_conn, resource_id)
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return {'changed': True, 'tags': latest_tags}
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except EC2ResponseError as e:
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raise AnsibleTagCreationException(
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'Unable to update tags for {0}, error: {1}'.format(resource_id, e))
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def get_matching_subnet(vpc_conn, vpc_id, cidr):
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subnets = vpc_conn.get_all_subnets(filters={'vpc_id': vpc_id})
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return next((s for s in subnets if s.cidr_block == cidr), None)
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def ensure_subnet_present(vpc_conn, vpc_id, cidr, az, tags, check_mode):
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subnet = get_matching_subnet(vpc_conn, vpc_id, cidr)
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changed = False
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if subnet is None:
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subnet = create_subnet(vpc_conn, vpc_id, cidr, az, check_mode)
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changed = True
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# Subnet will be None when check_mode is true
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if subnet is None:
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return {
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'changed': changed,
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'subnet': {}
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}
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if tags != subnet.tags:
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ensure_tags(vpc_conn, subnet.id, tags, False, check_mode)
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subnet.tags = tags
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changed = True
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subnet_info = get_subnet_info(subnet)
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return {
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'changed': changed,
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'subnet': subnet_info
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}
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def ensure_subnet_absent(vpc_conn, vpc_id, cidr, check_mode):
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subnet = get_matching_subnet(vpc_conn, vpc_id, cidr)
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if subnet is None:
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return {'changed': False}
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try:
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vpc_conn.delete_subnet(subnet.id, dry_run=check_mode)
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return {'changed': True}
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except EC2ResponseError as e:
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raise AnsibleVPCSubnetDeletionException(
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'Unable to delete subnet {0}, error: {1}'
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.format(subnet.cidr_block, e))
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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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az = dict(default=None, required=False),
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cidr = dict(default=None, required=True),
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state = dict(default='present', choices=['present', 'absent']),
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tags = dict(default=None, required=False, type='dict', aliases=['resource_tags']),
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vpc_id = dict(default=None, required=True)
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)
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)
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module = AnsibleModule(argument_spec=argument_spec, supports_check_mode=True)
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if not HAS_BOTO:
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module.fail_json(msg='boto is required for this module')
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region, ec2_url, aws_connect_params = get_aws_connection_info(module)
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if region:
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try:
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connection = connect_to_aws(boto.vpc, region, **aws_connect_params)
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except (boto.exception.NoAuthHandlerFound, StandardError), e:
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module.fail_json(msg=str(e))
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else:
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module.fail_json(msg="region must be specified")
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vpc_id = module.params.get('vpc_id')
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tags = module.params.get('tags')
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cidr = module.params.get('cidr')
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az = module.params.get('az')
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state = module.params.get('state')
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try:
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if state == 'present':
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result = ensure_subnet_present(connection, vpc_id, cidr, az, tags,
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check_mode=module.check_mode)
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elif state == 'absent':
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result = ensure_subnet_absent(connection, vpc_id, cidr,
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check_mode=module.check_mode)
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except AnsibleVPCSubnetException as e:
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module.fail_json(msg=str(e))
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module.exit_json(**result)
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from ansible.module_utils.basic import * # noqa
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from ansible.module_utils.ec2 import * # noqa
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if __name__ == '__main__':
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main()
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