#!/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 . DOCUMENTATION = ''' --- module: ec2_vpc short_description: configure AWS virtual private clouds description: - Create or terminates AWS virtual private clouds. This module has a dependency on python-boto. version_added: "1.4" options: cidr_block: description: - "The cidr block representing the VPC, e.g. 10.0.0.0/16" required: false, unless state=present dns_support: description: - toggles the "Enable DNS resolution" flag required: false default: "yes" choices: [ "yes", "no" ] dns_hostnames: description: - toggles the "Enable DNS hostname support for instances" flag required: false default: "yes" choices: [ "yes", "no" ] subnets: description: - "A dictionary array of subnets to add of the form: { cidr: ..., az: ... }. Where az is the desired availability zone of the subnet, but it is not required. All VPC subnets not in this list will be removed." required: false default: null aliases: [] vpc_id: description: - A VPC id to terminate when state=absent required: false default: null aliases: [] internet_gateway: description: - Toggle whether there should be an Internet gateway attached to the VPC required: false default: "no" choices: [ "yes", "no" ] aliases: [] route_tables: description: - "A dictionary array of route tables to add of the form: { subnets: [172.22.2.0/24, 172.22.3.0/24,], routes: [{ dest: 0.0.0.0/0, gw: igw},] }. Where the subnets list is those subnets the route table should be associated with, and the routes list is a list of routes to be in the table. The special keyword for the gw of igw specifies that you should the route should go through the internet gateway attached to the VPC. gw also accepts instance-ids in addition igw. This module is currently unable to affect the 'main' route table due to some limitations in boto, so you must explicitly define the associated subnets or they will be attached to the main table implicitly." required: false default: null aliases: [] wait: description: - wait for the VPC to be in state 'available' before returning required: false default: "no" choices: [ "yes", "no" ] aliases: [] wait_timeout: description: - how long before wait gives up, in seconds default: 300 aliases: [] state: description: - Create or terminate the VPC required: true default: present aliases: [] region: description: - region in which the resource exists. required: false default: null aliases: ['aws_region', 'ec2_region'] aws_secret_key: description: - AWS secret key. If not set then the value of the AWS_SECRET_KEY environment variable is used. required: false default: None aliases: ['ec2_secret_key', 'secret_key' ] aws_access_key: description: - AWS access key. If not set then the value of the AWS_ACCESS_KEY environment variable is used. required: false default: None aliases: ['ec2_access_key', 'access_key' ] requirements: [ "boto" ] author: Carson Gee ''' EXAMPLES = ''' # Note: None of these examples set aws_access_key, aws_secret_key, or region. # It is assumed that their matching environment variables are set. # Basic creation example: local_action: module: vpc state: present cidr_block: 172.23.0.0/16 region: us-west-2 # Full creation example with subnets and optional availability zones. # The absence or presense of subnets deletes or creates them respectively. local_action: module: vpc state: present cidr_block: 172.22.0.0/16 subnets: - cidr: 172.22.1.0/24 az: us-west-2c - cidr: 172.22.2.0/24 az: us-west-2b - cidr: 172.22.3.0/24 az: us-west-2a internet_gateway: True route_tables: - subnets: - 172.22.2.0/24 - 172.22.3.0/24 routes: - dest: 0.0.0.0/0 gw: igw - subnets: - 172.22.1.0/24 routes: - dest: 0.0.0.0/0 gw: igw region: us-west-2 register: vpc # Removal of a VPC by id local_action: module: vpc state: absent vpc_id: vpc-aaaaaaa region: us-west-2 If you have added elements not managed by this module, e.g. instances, NATs, etc then the delete will fail until those dependencies are removed. ''' import sys import time try: import boto.ec2 import boto.vpc from boto.exception import EC2ResponseError except ImportError: print "failed=True msg='boto required for this module'" sys.exit(1) AWS_REGIONS = ['ap-northeast-1', 'ap-southeast-1', 'ap-southeast-2', 'eu-west-1', 'sa-east-1', 'us-east-1', 'us-west-1', 'us-west-2'] def get_vpc_info(vpc): """ Retrieves vpc information from an instance ID and returns it as a dictionary """ return({ 'id': vpc.id, 'cidr_block': vpc.cidr_block, 'dhcp_options_id': vpc.dhcp_options_id, 'region': vpc.region.name, 'state': vpc.state, }) def create_vpc(module, vpc_conn): """ Creates a new VPC module : AnsibleModule object vpc_conn: authenticated VPCConnection connection object Returns: A dictionary with information about the VPC and subnets that were launched """ id = module.params.get('id') cidr_block = module.params.get('cidr_block') dns_support = module.params.get('dns_support') dns_hostnames = module.params.get('dns_hostnames') subnets = module.params.get('subnets') internet_gateway = module.params.get('internet_gateway') route_tables = module.params.get('route_tables') wait = module.params.get('wait') wait_timeout = int(module.params.get('wait_timeout')) changed = False # Check for existing VPC by cidr_block or id if id != None: filter_dict = {'vpc-id':id, 'state': 'available',} previous_vpcs = vpc_conn.get_all_vpcs(None, filter_dict) else: filter_dict = {'cidr': cidr_block, 'state': 'available'} previous_vpcs = vpc_conn.get_all_vpcs(None, filter_dict) if len(previous_vpcs) > 1: module.fail_json(msg='EC2 returned more than one VPC, aborting') if len(previous_vpcs) == 1: changed = False vpc = previous_vpcs[0] else: changed = True try: vpc = vpc_conn.create_vpc(cidr_block) # wait here until the vpc is available pending = True wait_timeout = time.time() + wait_timeout while wait and wait_timeout > time.time() and pending: pvpc = vpc_conn.get_all_vpcs(vpc.id) if pvpc.state == "available": pending = False time.sleep(5) if wait and wait_timeout <= time.time(): # waiting took too long module.fail_json(msg = "wait for vpc availability timeout on %s" % time.asctime()) except boto.exception.BotoServerError, e: module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message)) # Done with base VPC, now change to attributes and features. # boto doesn't appear to have a way to determine the existing # value of the dns attributes, so we just set them. # It also must be done one at a time. vpc_conn.modify_vpc_attribute(vpc.id, enable_dns_support=dns_support) vpc_conn.modify_vpc_attribute(vpc.id, enable_dns_hostnames=dns_hostnames) # Process all subnet properties if not isinstance(subnets, list): module.fail_json(msg='subnets needs to be a list of cidr blocks') current_subnets = vpc_conn.get_all_subnets(filters={ 'vpc_id': vpc.id }) # First add all new subnets for subnet in subnets: add_subnet = True for csn in current_subnets: if subnet['cidr'] == csn.cidr_block: add_subnet = False if add_subnet: try: vpc_conn.create_subnet(vpc.id, subnet['cidr'], subnet.get('az', None)) changed = True except EC2ResponseError as e: module.fail_json(msg='Unable to create subnet {0}, error: {1}'.format(subnet['cidr'], e)) # Now delete all absent subnets for csubnet in current_subnets: delete_subnet = True for subnet in subnets: if csubnet.cidr_block == subnet['cidr']: delete_subnet = False if delete_subnet: try: vpc_conn.delete_subnet(csubnet.id) changed = True except EC2ResponseError as e: module.fail_json(msg='Unable to delete subnet {0}, error: {1}'.format(csubnet.cidr_block, e)) # Handle Internet gateway (create/delete igw) igw = None igws = vpc_conn.get_all_internet_gateways(filters={'attachment.vpc-id': vpc.id}) if len(igws) > 1: module.fail_json(msg='EC2 returned more than one Internet Gateway for id %s, aborting' % vpc.id) if internet_gateway: if len(igws) != 1: try: igw = vpc_conn.create_internet_gateway() vpc_conn.attach_internet_gateway(igw.id, vpc.id) changed = True except EC2ResponseError as e: module.fail_json(msg='Unable to create Internet Gateway, error: {0}'.format(e)) else: # Set igw variable to the current igw instance for use in route tables. igw = igws[0] else: if len(igws) > 0: try: vpc_conn.detach_internet_gateway(igws[0].id, vpc.id) vpc_conn.delete_internet_gateway(igws[0].id) changed = True except EC2ResponseError as e: module.fail_json(msg='Unable to delete Internet Gateway, error: {0}'.format(e)) # Handle route tables - this may be worth splitting into a # different module but should work fine here. The strategy to stay # indempotent is to basically build all the route tables as # defined, track the route table ids, and then run through the # remote list of route tables and delete any that we didn't # create. This shouldn't interupt traffic in theory, but is the # only way to really work with route tables over time that I can # think of without using painful aws ids. Hopefully boto will add # the replace-route-table API to make this smoother and # allow control of the 'main' routing table. if not isinstance(route_tables, list): module.fail_json(msg='route tables need to be a list of dictionaries') # Work through each route table and update/create to match dictionary array all_route_tables = [] for rt in route_tables: try: new_rt = vpc_conn.create_route_table(vpc.id) for route in rt['routes']: r_gateway = route['gw'] if r_gateway == 'igw': if not internet_gateway: module.fail_json( msg='You asked for an Internet Gateway ' \ '(igw) route, but you have no Internet Gateway' ) r_gateway = igw.id vpc_conn.create_route(new_rt.id, route['dest'], r_gateway) # Associate with subnets for sn in rt['subnets']: rsn = vpc_conn.get_all_subnets(filters={'cidr': sn }) if len(rsn) != 1: module.fail_json( msg='The subnet {0} to associate with route_table {1} ' \ 'does not exist, aborting'.format(sn, rt) ) rsn = rsn[0] # Disassociate then associate since we don't have replace old_rt = vpc_conn.get_all_route_tables( filters={'association.subnet_id': rsn.id} ) if len(old_rt) == 1: old_rt = old_rt[0] association_id = None for a in old_rt.associations: if a.subnet_id == rsn.id: association_id = a.id vpc_conn.disassociate_route_table(association_id) vpc_conn.associate_route_table(new_rt.id, rsn.id) all_route_tables.append(new_rt) except EC2ResponseError as e: module.fail_json( msg='Unable to create and associate route table {0}, error: ' \ '{1}'.format(rt, e) ) # Now that we are good to go on our new route tables, delete the # old ones except the 'main' route table as boto can't set the main # table yet. all_rts = vpc_conn.get_all_route_tables(filters={'vpc-id': vpc.id}) for rt in all_rts: delete_rt = True for newrt in all_route_tables: if newrt.id == rt.id: delete_rt = False if delete_rt: rta = rt.associations is_main = False for a in rta: if a.main: is_main = True try: if not is_main: vpc_conn.delete_route_table(rt.id) except EC2ResponseError as e: module.fail_json(msg='Unable to delete old route table {0}, error: {1}'.format(rt.id, e)) vpc_dict = get_vpc_info(vpc) created_vpc_id = vpc.id returned_subnets = [] current_subnets = vpc_conn.get_all_subnets(filters={ 'vpc_id': vpc.id }) for sn in current_subnets: returned_subnets.append({ 'cidr': sn.cidr_block, 'az': sn.availability_zone, 'id': sn.id, }) return (vpc_dict, created_vpc_id, returned_subnets, changed) def terminate_vpc(module, vpc_conn, vpc_id=None, cidr=None): """ Terminates a VPC module: Ansible module object vpc_conn: authenticated VPCConnection connection object vpc_id: a vpc id to terminate cidr: The cidr block of the VPC - can be used in lieu of an ID Returns a dictionary of VPC information about the VPC terminated. If the VPC to be terminated is available "changed" will be set to True. """ vpc_dict = {} terminated_vpc_id = '' changed = False if vpc_id == None and cidr == None: module.fail_json( msg='You must either specify a vpc id or a cidr '\ 'block to terminate a VPC, aborting' ) if vpc_id is not None: vpc_rs = vpc_conn.get_all_vpcs(vpc_id) else: vpc_rs = vpc_conn.get_all_vpcs(filters={'cidr': cidr}) if len(vpc_rs) > 1: module.fail_json( msg='EC2 returned more than one VPC for id {0} ' \ 'or cidr {1}, aborting'.format(vpc_id,vidr) ) if len(vpc_rs) == 1: vpc = vpc_rs[0] if vpc.state == 'available': terminated_vpc_id=vpc.id vpc_dict=get_vpc_info(vpc) try: subnets = vpc_conn.get_all_subnets(filters={'vpc_id': vpc.id}) for sn in subnets: vpc_conn.delete_subnet(sn.id) igws = vpc_conn.get_all_internet_gateways( filters={'attachment.vpc-id': vpc.id} ) for igw in igws: vpc_conn.detach_internet_gateway(igw.id, vpc.id) vpc_conn.delete_internet_gateway(igw.id) rts = vpc_conn.get_all_route_tables(filters={'vpc_id': vpc.id}) for rt in rts: rta = rt.associations is_main = False for a in rta: if a.main: is_main = True if not is_main: vpc_conn.delete_route_table(rt.id) vpc_conn.delete_vpc(vpc.id) except EC2ResponseError as e: module.fail_json( msg='Unable to delete VPC {0}, error: {1}'.format(vpc.id, e) ) changed = True return (changed, vpc_dict, terminated_vpc_id) def main(): module = AnsibleModule( argument_spec = dict( cidr_block = dict(), wait = dict(choices=BOOLEANS, default=False), wait_timeout = dict(default=300), dns_support = dict(choices=BOOLEANS, default=True), dns_hostnames = dict(choices=BOOLEANS, default=True), subnets = dict(type='list'), vpc_id = dict(), internet_gateway = dict(choices=BOOLEANS, default=False), route_tables = dict(type='list'), region = dict(aliases=['aws_region', 'ec2_region'], choices=AWS_REGIONS), state = dict(choices=['present', 'absent'], default='present'), aws_secret_key = dict(aliases=['ec2_secret_key', 'secret_key'], no_log=True), aws_access_key = dict(aliases=['ec2_access_key', 'access_key']), ) ) state = module.params.get('state') ec2_url, aws_access_key, aws_secret_key, region = get_ec2_creds(module) # If we have a region specified, connect to its endpoint. if region: try: vpc_conn = boto.vpc.connect_to_region( region, aws_access_key_id=aws_access_key, aws_secret_access_key=aws_secret_key ) except boto.exception.NoAuthHandlerFound, e: module.fail_json(msg = str(e)) else: module.fail_json(msg="region must be specified") if module.params.get('state') == 'absent': vpc_id = module.params.get('vpc_id') cidr = module.params.get('cidr_block') if vpc_id == None and cidr == None: module.fail_json( msg='You must either specify a vpc id or a cidr '\ 'block to terminate a VPC, aborting' ) (changed, vpc_dict, new_vpc_id) = terminate_vpc(module, vpc_conn, vpc_id, cidr) subnets_changed = None elif module.params.get('state') == 'present': # Changed is always set to true when provisioning a new VPC (vpc_dict, new_vpc_id, subnets_changed, changed) = create_vpc(module, vpc_conn) module.exit_json(changed=changed, vpc_id=new_vpc_id, vpc=vpc_dict, subnets=subnets_changed) # import module snippets from ansible.module_utils.basic import * from ansible.module_utils.ec2 import * main()