ansible/cloud/amazon/ec2_eni.py
Dennis Conrad 9acc141082 Fix for existing ENIs w/ multiple security groups
Do a sorted comparison of the list of security groups supplied via `module.params.get('security_groups')` and the list of security groups fetched via `get_sec_group_list(eni.groups)`.  This fixes an incorrect "The specified address is already in use" error if the order of security groups in those lists differ.
2016-03-17 17:08:40 +00:00

401 lines
14 KiB
Python

#!/usr/bin/python
#
# This is a 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.
#
# This Ansible library 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 this library. If not, see <http://www.gnu.org/licenses/>.
DOCUMENTATION = '''
---
module: ec2_eni
short_description: Create and optionally attach an Elastic Network Interface (ENI) to an instance
description:
- Create and optionally attach an Elastic Network Interface (ENI) to an instance. If an ENI ID is provided, an attempt is made to update the existing ENI. By passing 'None' as the instance_id, an ENI can be detached from an instance.
version_added: "2.0"
author: Rob White, wimnat [at] gmail.com, @wimnat
options:
eni_id:
description:
- The ID of the ENI
required: false
default: null
instance_id:
description:
- Instance ID that you wish to attach ENI to. To detach an ENI from an instance, use 'None'.
required: false
default: null
private_ip_address:
description:
- Private IP address.
required: false
default: null
subnet_id:
description:
- ID of subnet in which to create the ENI. Only required when state=present.
required: true
description:
description:
- Optional description of the ENI.
required: false
default: null
security_groups:
description:
- List of security groups associated with the interface. Only used when state=present.
required: false
default: null
state:
description:
- Create or delete ENI.
required: false
default: present
choices: [ 'present', 'absent' ]
device_index:
description:
- The index of the device for the network interface attachment on the instance.
required: false
default: 0
force_detach:
description:
- Force detachment of the interface. This applies either when explicitly detaching the interface by setting instance_id to None or when deleting an interface with state=absent.
required: false
default: no
delete_on_termination:
description:
- Delete the interface when the instance it is attached to is terminated. You can only specify this flag when the interface is being modified, not on creation.
required: false
source_dest_check:
description:
- By default, interfaces perform source/destination checks. NAT instances however need this check to be disabled. You can only specify this flag when the interface is being modified, not on creation.
required: false
extends_documentation_fragment:
- aws
- ec2
'''
EXAMPLES = '''
# Note: These examples do not set authentication details, see the AWS Guide for details.
# Create an ENI. As no security group is defined, ENI will be created in default security group
- ec2_eni:
private_ip_address: 172.31.0.20
subnet_id: subnet-xxxxxxxx
state: present
# Create an ENI and attach it to an instance
- ec2_eni:
instance_id: i-xxxxxxx
device_index: 1
private_ip_address: 172.31.0.20
subnet_id: subnet-xxxxxxxx
state: present
# Destroy an ENI, detaching it from any instance if necessary
- ec2_eni:
eni_id: eni-xxxxxxx
force_detach: yes
state: absent
# Update an ENI
- ec2_eni:
eni_id: eni-xxxxxxx
description: "My new description"
state: present
# Detach an ENI from an instance
- ec2_eni:
eni_id: eni-xxxxxxx
instance_id: None
state: present
### Delete an interface on termination
# First create the interface
- ec2_eni:
instance_id: i-xxxxxxx
device_index: 1
private_ip_address: 172.31.0.20
subnet_id: subnet-xxxxxxxx
state: present
register: eni
# Modify the interface to enable the delete_on_terminaton flag
- ec2_eni:
eni_id: {{ "eni.interface.id" }}
delete_on_termination: true
'''
import time
import xml.etree.ElementTree as ET
import re
try:
import boto.ec2
from boto.exception import BotoServerError
HAS_BOTO = True
except ImportError:
HAS_BOTO = False
def get_error_message(xml_string):
root = ET.fromstring(xml_string)
for message in root.findall('.//Message'):
return message.text
def get_eni_info(interface):
interface_info = {'id': interface.id,
'subnet_id': interface.subnet_id,
'vpc_id': interface.vpc_id,
'description': interface.description,
'owner_id': interface.owner_id,
'status': interface.status,
'mac_address': interface.mac_address,
'private_ip_address': interface.private_ip_address,
'source_dest_check': interface.source_dest_check,
'groups': dict((group.id, group.name) for group in interface.groups),
}
if interface.attachment is not None:
interface_info['attachment'] = {'attachment_id': interface.attachment.id,
'instance_id': interface.attachment.instance_id,
'device_index': interface.attachment.device_index,
'status': interface.attachment.status,
'attach_time': interface.attachment.attach_time,
'delete_on_termination': interface.attachment.delete_on_termination,
}
return interface_info
def wait_for_eni(eni, status):
while True:
time.sleep(3)
eni.update()
# If the status is detached we just need attachment to disappear
if eni.attachment is None:
if status == "detached":
break
else:
if status == "attached" and eni.attachment.status == "attached":
break
def create_eni(connection, module):
instance_id = module.params.get("instance_id")
if instance_id == 'None':
instance_id = None
device_index = module.params.get("device_index")
subnet_id = module.params.get('subnet_id')
private_ip_address = module.params.get('private_ip_address')
description = module.params.get('description')
security_groups = module.params.get('security_groups')
changed = False
try:
eni = compare_eni(connection, module)
if eni is None:
eni = connection.create_network_interface(subnet_id, private_ip_address, description, security_groups)
if instance_id is not None:
try:
eni.attach(instance_id, device_index)
except BotoServerError:
eni.delete()
raise
# Wait to allow creation / attachment to finish
wait_for_eni(eni, "attached")
eni.update()
changed = True
except BotoServerError as e:
module.fail_json(msg=get_error_message(e.args[2]))
module.exit_json(changed=changed, interface=get_eni_info(eni))
def modify_eni(connection, module):
eni_id = module.params.get("eni_id")
instance_id = module.params.get("instance_id")
if instance_id == 'None':
instance_id = None
do_detach = True
else:
do_detach = False
device_index = module.params.get("device_index")
description = module.params.get('description')
security_groups = module.params.get('security_groups')
force_detach = module.params.get("force_detach")
source_dest_check = module.params.get("source_dest_check")
delete_on_termination = module.params.get("delete_on_termination")
changed = False
try:
# Get the eni with the eni_id specified
eni_result_set = connection.get_all_network_interfaces(eni_id)
eni = eni_result_set[0]
if description is not None:
if eni.description != description:
connection.modify_network_interface_attribute(eni.id, "description", description)
changed = True
if security_groups is not None:
if sorted(get_sec_group_list(eni.groups)) != sorted(security_groups):
connection.modify_network_interface_attribute(eni.id, "groupSet", security_groups)
changed = True
if source_dest_check is not None:
if eni.source_dest_check != source_dest_check:
connection.modify_network_interface_attribute(eni.id, "sourceDestCheck", source_dest_check)
changed = True
if delete_on_termination is not None:
if eni.attachment is not None:
if eni.attachment.delete_on_termination is not delete_on_termination:
connection.modify_network_interface_attribute(eni.id, "deleteOnTermination", delete_on_termination, eni.attachment.id)
changed = True
else:
module.fail_json(msg="Can not modify delete_on_termination as the interface is not attached")
if eni.attachment is not None and instance_id is None and do_detach is True:
eni.detach(force_detach)
wait_for_eni(eni, "detached")
changed = True
else:
if instance_id is not None:
eni.attach(instance_id, device_index)
wait_for_eni(eni, "attached")
changed = True
except BotoServerError as e:
print e
module.fail_json(msg=get_error_message(e.args[2]))
eni.update()
module.exit_json(changed=changed, interface=get_eni_info(eni))
def delete_eni(connection, module):
eni_id = module.params.get("eni_id")
force_detach = module.params.get("force_detach")
try:
eni_result_set = connection.get_all_network_interfaces(eni_id)
eni = eni_result_set[0]
if force_detach is True:
if eni.attachment is not None:
eni.detach(force_detach)
# Wait to allow detachment to finish
wait_for_eni(eni, "detached")
eni.update()
eni.delete()
changed = True
else:
eni.delete()
changed = True
module.exit_json(changed=changed)
except BotoServerError as e:
msg = get_error_message(e.args[2])
regex = re.compile('The networkInterface ID \'.*\' does not exist')
if regex.search(msg) is not None:
module.exit_json(changed=False)
else:
module.fail_json(msg=get_error_message(e.args[2]))
def compare_eni(connection, module):
eni_id = module.params.get("eni_id")
subnet_id = module.params.get('subnet_id')
private_ip_address = module.params.get('private_ip_address')
description = module.params.get('description')
security_groups = module.params.get('security_groups')
try:
all_eni = connection.get_all_network_interfaces(eni_id)
for eni in all_eni:
remote_security_groups = get_sec_group_list(eni.groups)
if (eni.subnet_id == subnet_id) and (eni.private_ip_address == private_ip_address) and (eni.description == description) and (sorted(remote_security_groups) == sorted(security_groups)):
return eni
except BotoServerError as e:
module.fail_json(msg=get_error_message(e.args[2]))
return None
def get_sec_group_list(groups):
# Build list of remote security groups
remote_security_groups = []
for group in groups:
remote_security_groups.append(group.id.encode())
return remote_security_groups
def main():
argument_spec = ec2_argument_spec()
argument_spec.update(
dict(
eni_id = dict(default=None),
instance_id = dict(default=None),
private_ip_address = dict(),
subnet_id = dict(),
description = dict(),
security_groups = dict(type='list'),
device_index = dict(default=0, type='int'),
state = dict(default='present', choices=['present', 'absent']),
force_detach = dict(default='no', type='bool'),
source_dest_check = dict(default=None, type='bool'),
delete_on_termination = dict(default=None, type='bool')
)
)
module = AnsibleModule(argument_spec=argument_spec)
if not HAS_BOTO:
module.fail_json(msg='boto required for this module')
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
if region:
try:
connection = connect_to_aws(boto.ec2, region, **aws_connect_params)
except (boto.exception.NoAuthHandlerFound, AnsibleAWSError), e:
module.fail_json(msg=str(e))
else:
module.fail_json(msg="region must be specified")
state = module.params.get("state")
eni_id = module.params.get("eni_id")
if state == 'present':
if eni_id is None:
if module.params.get("subnet_id") is None:
module.fail_json(msg="subnet_id must be specified when state=present")
create_eni(connection, module)
else:
modify_eni(connection, module)
elif state == 'absent':
if eni_id is None:
module.fail_json(msg="eni_id must be specified")
else:
delete_eni(connection, module)
from ansible.module_utils.basic import *
from ansible.module_utils.ec2 import *
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
if __name__ == '__main__':
main()