ansible/library/cloud/ec2_eip
2013-10-24 12:19:43 -04:00

299 lines
10 KiB
Python

#!/usr/bin/python
DOCUMENTATION = '''
---
module: ec2_eip
short_description: associate an EC2 elastic IP with an instance.
description:
- This module associates AWS EC2 elastic IP addresses with instances
version_added: 1.4
options:
instance_id:
description:
- The EC2 instance id
required: false
public_ip:
description:
- The elastic IP address to associate with the instance.
- If absent, allocate a new address
required: false
state:
description:
- If present, associate the IP with the instance.
- If absent, disassociate the IP with the instance.
required: false
choices: ['present', 'absent']
default: present
ec2_url:
description:
- URL to use to connect to EC2-compatible cloud (by default the module will use EC2 endpoints)
required: false
default: null
aliases: [ EC2_URL ]
ec2_access_key:
description:
- EC2 access key. If not specified then the EC2_ACCESS_KEY environment variable is used.
required: false
default: null
aliases: [ EC2_ACCESS_KEY ]
ec2_secret_key:
description:
- EC2 secret key. If not specified then the EC2_SECRET_KEY environment variable is used.
required: false
default: null
aliases: [ EC2_SECRET_KEY ]
region:
description:
- the EC2 region to use
required: false
default: null
aliases: [ ec2_region ]
in_vpc:
description:
- allocate an EIP inside a VPC or not
required: false
default: false
version_added: "1.4"
requirements: [ "boto" ]
author: Lorin Hochstein <lorin@nimbisservices.com>
notes:
- This module will return C(public_ip) on success, which will contain the
public IP address associated with the instance.
- There may be a delay between the time the Elastic IP is assigned and when
the cloud instance is reachable via the new address. Use wait_for and pause
to delay further playbook execution until the instance is reachable, if
necessary.
'''
EXAMPLES = '''
- name: associate an elastic IP with an instance
ec2_eip: instance_id=i-1212f003 ip=93.184.216.119
- name: disassociate an elastic IP from an instance
ec2_eip: instance_id=i-1212f003 ip=93.184.216.119 state=absent
- name: allocate a new elastic IP and associate it with an instance
ec2_eip: instance_id=i-1212f003
- name: allocate a new elastic IP without associating it to anything
ec2_eip:
register: eip
- name: output the IP
debug: msg="Allocated IP is {{ eip.public_ip }}"
- name: provision new instances with ec2
ec2: keypair=mykey instance_type=c1.medium image=emi-40603AD1 wait=yes group=webserver count=3
register: ec2
- name: associate new elastic IPs with each of the instances
ec2_eip: "instance_id={{ item }}"
with_items: ec2.instance_ids
- name: allocate a new elastic IP inside a VPC in us-west-2
ec2_eip: region=us-west-2 in_vpc=yes
register: eip
- name: output the IP
debug: msg="Allocated IP inside a VPC is {{ eip.public_ip }}"
'''
try:
import boto.ec2
except ImportError:
boto_found = False
else:
boto_found = True
def connect(ec2_url, ec2_secret_key, ec2_access_key, region):
""" Return an ec2 connection"""
# allow environment variables to be used if ansible vars aren't set
if not ec2_url and 'EC2_URL' in os.environ:
ec2_url = os.environ['EC2_URL']
if not ec2_secret_key and 'EC2_SECRET_KEY' in os.environ:
ec2_secret_key = os.environ['EC2_SECRET_KEY']
if not ec2_access_key and 'EC2_ACCESS_KEY' in os.environ:
ec2_access_key = os.environ['EC2_ACCESS_KEY']
# If we have a region specified, connect to its endpoint.
if region:
try:
ec2 = boto.ec2.connect_to_region(region,
aws_access_key_id=ec2_access_key,
aws_secret_access_key=ec2_secret_key)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg = str(" %s %s %s " % (region, ec2_access_key,
ec2_secret_key)))
# Otherwise, no region so we fallback to the old connection method
else:
try:
if ec2_url: # if we have an URL set, connect to the specified endpoint
ec2 = boto.connect_ec2_endpoint(ec2_url, ec2_access_key, ec2_secret_key)
else: # otherwise it's Amazon.
ec2 = boto.connect_ec2(ec2_access_key, ec2_secret_key)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg = str(e))
return ec2
def associate_ip_and_instance(ec2, address, instance_id, module):
if ip_is_associated_with_instance(ec2, address.public_ip, instance_id, module):
module.exit_json(changed=False, public_ip=address.public_ip)
# If we're in check mode, nothing else to do
if module.check_mode:
module.exit_json(changed=True)
try:
if address.domain == "vpc":
res = ec2.associate_address(instance_id, allocation_id=address.allocation_id)
else:
res = ec2.associate_address(instance_id, public_ip=address.public_ip)
except boto.exception.EC2ResponseError, e:
module.fail_json(msg=str(e))
if res:
module.exit_json(changed=True, public_ip=address.public_ip)
else:
module.fail_json(msg="association failed")
def disassociate_ip_and_instance(ec2, address, instance_id, module):
if not ip_is_associated_with_instance(ec2, address.public_ip, instance_id, module):
module.exit_json(changed=False, public_ip=address.public_ip)
# If we're in check mode, nothing else to do
if module.check_mode:
module.exit_json(changed=True)
try:
if address.domain == "vpc":
res = ec2.disassociate_address(association_id=address.association_id)
else:
res = ec2.disassociate_address(public_ip=address.public_ip)
except boto.exception.EC2ResponseError, e:
module.fail_json(msg=str(e))
if res:
module.exit_json(changed=True)
else:
module.fail_json(msg="disassociation failed")
def find_address(ec2, public_ip, module):
""" Find an existing Elastic IP address """
try:
addresses = ec2.get_all_addresses([public_ip])
except boto.exception.EC2ResponseError, e:
module.fail_json(msg=str(e.message))
return addresses[0]
def ip_is_associated_with_instance(ec2, public_ip, instance_id, module):
""" Check if the elastic IP is currently associated with the instance """
address = find_address(ec2, public_ip, module)
if address:
return address.instance_id == instance_id
else:
return False
def allocate_address(ec2, domain, module):
""" Allocate a new elastic IP address and return it """
# If we're in check mode, nothing else to do
if module.check_mode:
module.exit_json(change=True)
address = ec2.allocate_address(domain=domain)
return address
def release_address(ec2, public_ip, module):
""" Release a previously allocated elastic IP address """
address = find_address(ec2, public_ip, module)
# If we're in check mode, nothing else to do
if module.check_mode:
module.exit_json(change=True)
res = address.release()
if res:
module.exit_json(changed=True)
else:
module.fail_json(msg="release failed")
def find_instance(ec2, instance_id, module):
""" Attempt to find the EC2 instance and return it """
try:
reservations = ec2.get_all_reservations(instance_ids=[instance_id])
except boto.exception.EC2ResponseError, e:
module.fail_json(msg=str(e))
if len(reservations) == 1:
instances = reservations[0].instances
if len(instances) == 1:
return instances[0]
module.fail_json(msg="could not find instance" + instance_id)
def main():
module = AnsibleModule(
argument_spec = dict(
instance_id = dict(required=False),
public_ip = dict(required=False, aliases= ['ip']),
state = dict(required=False, default='present',
choices=['present', 'absent']),
ec2_url = dict(required=False, aliases=['EC2_URL']),
ec2_secret_key = dict(required=False, aliases=['EC2_SECRET_KEY'], no_log=True),
ec2_access_key = dict(required=False, aliases=['EC2_ACCESS_KEY']),
region = dict(required=False, aliases=['ec2_region']),
in_vpc = dict(required=False, choices=BOOLEANS, default=False),
),
supports_check_mode=True
)
if not boto_found:
module.fail_json(msg="boto is required")
ec2 = connect(ec2_url=module.params.get('ec2_url'),
ec2_secret_key=module.params.get('ec2_secret_key'),
ec2_access_key=module.params.get('ec2_access_key'),
region=module.params.get('region'))
instance_id = module.params.get('instance_id')
public_ip = module.params.get('public_ip')
state = module.params.get('state')
in_vpc = module.params.get('in_vpc')
domain = "vpc" if in_vpc else None
if state == 'present':
if public_ip is None:
if instance_id is None:
address = allocate_address(ec2, domain, module)
module.exit_json(changed=True, public_ip=address.public_ip)
else:
# Determine if the instance is inside a VPC or not
instance = find_instance(ec2, instance_id, module)
if instance.vpc_id != None:
domain = "vpc"
address = allocate_address(ec2, domain, module)
else:
address = find_address(ec2, public_ip, module)
associate_ip_and_instance(ec2, address, instance_id, module)
else:
if instance_id is None:
release_address(ec2, public_ip, module)
else:
address = find_address(ec2, public_ip, module)
disassociate_ip_and_instance(ec2, address, instance_id, module)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
if __name__ == '__main__':
main()