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ansible/library/cloud/ec2_vpc
James Cammarata 311ec543af If not specified, do not modify subnet/route_tables for ec2 VPCs 
Also fixes a bug whereby any changes to the route_tables were not
properly reflected by setting changed=True.

Fixes #8666
2014-08-22 11:03:41 -05:00

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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_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
instance_tenancy:
description:
- "The supported tenancy options for instances launched into the VPC."
required: false
default: "default"
choices: [ "default", "dedicated" ]
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: ... , resource_tags: ... }. Where az is the desired availability zone of the subnet, but it is not required. Tags (i.e.: resource_tags) is also optional and use dictionary form: { "Environment":"Dev", "Tier":"Web", ...}. All VPC subnets not in this list will be removed. As of 1.8, if the subnets parameter is not specified, no existing subnets will be modified.'
required: false
default: null
aliases: []
vpc_id:
description:
- A VPC id to terminate when state=absent
required: false
default: null
aliases: []
resource_tags:
description:
- 'A dictionary array of resource tags of the form: { tag1: value1, tag2: value2 }. Tags in this list are used in conjunction with CIDR block to uniquely identify a VPC in lieu of vpc_id. Therefore, if CIDR/Tag combination does not exits, a new VPC will be created. VPC tags not on this list will be ignored. Prior to 1.7, specifying a resource tag was optional.'
required: true
default: null
aliases: []
version_added: "1.6"
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. As of 1.8, if the route_tables parameter is not specified, no existing routes will be modified.'
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' ]
validate_certs:
description:
- When set to "no", SSL certificates will not be validated for boto versions >= 2.6.0.
required: false
default: "yes"
choices: ["yes", "no"]
aliases: []
version_added: "1.5"
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: ec2_vpc
state: present
cidr_block: 172.23.0.0/16
resource_tags: { "Environment":"Development" }
region: us-west-2
# Full creation example with subnets and optional availability zones.
# The absence or presence of subnets deletes or creates them respectively.
local_action:
module: ec2_vpc
state: present
cidr_block: 172.22.0.0/16
resource_tags: { "Environment":"Development" }
subnets:
- cidr: 172.22.1.0/24
az: us-west-2c
resource_tags: { "Environment":"Dev", "Tier" : "Web" }
- cidr: 172.22.2.0/24
az: us-west-2b
resource_tags: { "Environment":"Dev", "Tier" : "App" }
- cidr: 172.22.3.0/24
az: us-west-2a
resource_tags: { "Environment":"Dev", "Tier" : "DB" }
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: ec2_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)
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 find_vpc(module, vpc_conn, vpc_id=None, cidr=None):
"""
Finds a VPC that matches a specific id or cidr + tags
module : AnsibleModule object
vpc_conn: authenticated VPCConnection connection object
Returns:
A VPC object that matches either an ID or CIDR and one or more tag values
"""
if vpc_id == None and cidr == None:
module.fail_json(
msg='You must specify either a vpc_id or a cidr block + list of unique tags, aborting'
)
found_vpcs = []
resource_tags = module.params.get('resource_tags')
# Check for existing VPC by cidr_block or id
if vpc_id is not None:
found_vpcs = vpc_conn.get_all_vpcs(None, {'vpc-id': vpc_id, 'state': 'available',})
else:
previous_vpcs = vpc_conn.get_all_vpcs(None, {'cidr': cidr, 'state': 'available'})
for vpc in previous_vpcs:
# Get all tags for each of the found VPCs
vpc_tags = dict((t.name, t.value) for t in vpc_conn.get_all_tags(filters={'resource-id': vpc.id}))
# If the supplied list of ID Tags match a subset of the VPC Tags, we found our VPC
if resource_tags and set(resource_tags.items()).issubset(set(vpc_tags.items())):
found_vpcs.append(vpc)
found_vpc = None
if len(found_vpcs) == 1:
found_vpc = found_vpcs[0]
if len(found_vpcs) > 1:
module.fail_json(msg='Found more than one vpc based on the supplied criteria, aborting')
return (found_vpc)
def create_vpc(module, vpc_conn):
"""
Creates a new or modifies an existing 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('vpc_id')
cidr_block = module.params.get('cidr_block')
instance_tenancy = module.params.get('instance_tenancy')
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')
vpc_spec_tags = module.params.get('resource_tags')
wait = module.params.get('wait')
wait_timeout = int(module.params.get('wait_timeout'))
changed = False
# Check for existing VPC by cidr_block + tags or id
previous_vpc = find_vpc(module, vpc_conn, id, cidr_block)
if previous_vpc is not None:
changed = False
vpc = previous_vpc
else:
changed = True
try:
vpc = vpc_conn.create_vpc(cidr_block, instance_tenancy)
# wait here until the vpc is available
pending = True
wait_timeout = time.time() + wait_timeout
while wait and wait_timeout > time.time() and pending:
try:
pvpc = vpc_conn.get_all_vpcs(vpc.id)
if hasattr(pvpc, 'state'):
if pvpc.state == "available":
pending = False
elif hasattr(pvpc[0], 'state'):
if pvpc[0].state == "available":
pending = False
# sometimes vpc_conn.create_vpc() will return a vpc that can't be found yet by vpc_conn.get_all_vpcs()
# when that happens, just wait a bit longer and try again
except boto.exception.BotoServerError, e:
if e.error_code != 'InvalidVpcID.NotFound':
raise
if pending:
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.
# Add resource tags
vpc_tags = dict((t.name, t.value) for t in vpc_conn.get_all_tags(filters={'resource-id': vpc.id}))
if not set(vpc_spec_tags.items()).issubset(set(vpc_tags.items())):
new_tags = {}
for (key, value) in set(vpc_spec_tags.items()):
if (key, value) not in set(vpc_tags.items()):
new_tags[key] = value
if new_tags:
vpc_conn.create_tags(vpc.id, new_tags)
# 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 subnets is not None:
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:
new_subnet = vpc_conn.create_subnet(vpc.id, subnet['cidr'], subnet.get('az', None))
new_subnet_tags = subnet.get('resource_tags', None)
if new_subnet_tags:
# Sometimes AWS takes its time to create a subnet and so using new subnets's id
# to create tags results in exception.
# boto doesn't seem to refresh 'state' of the newly created subnet, i.e.: it's always 'pending'
# so i resorted to polling vpc_conn.get_all_subnets with the id of the newly added subnet
while len(vpc_conn.get_all_subnets(filters={ 'subnet-id': new_subnet.id })) == 0:
time.sleep(0.1)
vpc_conn.create_tags(new_subnet.id, new_subnet_tags)
changed = True
except EC2ResponseError, 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, 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, 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, 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 interrupt 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 route_tables is not None:
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']:
route_kwargs = {}
if route['gw'] == 'igw':
if not internet_gateway:
module.fail_json(
msg='You asked for an Internet Gateway ' \
'(igw) route, but you have no Internet Gateway'
)
route_kwargs['gateway_id'] = igw.id
elif route['gw'].startswith('i-'):
route_kwargs['instance_id'] = route['gw']
else:
route_kwargs['gateway_id'] = route['gw']
vpc_conn.create_route(new_rt.id, route['dest'], **route_kwargs)
# Associate with subnets
for sn in rt['subnets']:
rsn = vpc_conn.get_all_subnets(filters={'cidr': sn, 'vpc_id': vpc.id })
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, 'vpc_id': vpc.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)
changed = True
except EC2ResponseError, 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
break
if delete_rt:
rta = rt.associations
is_main = False
for a in rta:
if a.main:
is_main = True
break
try:
if not is_main:
vpc_conn.delete_route_table(rt.id)
changed = True
except EC2ResponseError, 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({
'resource_tags': dict((t.name, t.value) for t in vpc_conn.get_all_tags(filters={'resource-id': sn.id})),
'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
vpc = find_vpc(module, vpc_conn, vpc_id, cidr)
if vpc is not None:
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, 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():
argument_spec = ec2_argument_spec()
argument_spec.update(dict(
cidr_block = dict(),
instance_tenancy = dict(choices=['default', 'dedicated'], default='default'),
wait = dict(type='bool', default=False),
wait_timeout = dict(default=300),
dns_support = dict(type='bool', default=True),
dns_hostnames = dict(type='bool', default=True),
subnets = dict(type='list', default=[]),
vpc_id = dict(),
internet_gateway = dict(type='bool', default=False),
resource_tags = dict(type='dict', required=True),
route_tables = dict(type='list', default=[]),
state = dict(choices=['present', 'absent'], default='present'),
)
)
module = AnsibleModule(
argument_spec=argument_spec,
)
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')
(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()
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