ansible/library/cloudformation
2013-04-01 15:15:40 -04:00

245 lines
8 KiB
Python

#!/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: cloudformation
short_description: create a AWS CloudFormation stack
description:
- Launches an AWS CloudFormation stack and waits for it complete.
version_added: "1.1"
options:
stack_name:
description:
- name of the cloudformation stack
required: true
default: null
aliases: []
disable_rollback:
description:
- If a stacks fails to form, rollback will remove the stack
required: false
default: "no"
choices: [ "yes", "no" ]
aliases: []
template_parameters:
description:
- a list of hashes of all the template variables for the stack
required: true
default: null
aliases: []
region:
description:
- The AWS region the stack will be launched in
required: true
default: null
aliases: []
state:
description:
- If state is "present", stack will be created. If state is "present" and if stack exists and template has changed, it will be updated.
If state is absent, stack will be removed.
required: true
default: null
aliases: []
template:
description:
- the path of the cloudformation template
required: true
default: null
aliases: []
wait_for:
description:
- Wait while the stack is being created/updated/deleted.
required: false
default: "yes"
choices: [ "yes", "no" ]
aliases: []
examples:
tasks:
- name: launch ansible cloudformation example
cloudformation: >
stack_name="ansible-cloudformation" state=present
region=us-east-1 disable_rollback=yes
template=files/cloudformation-example.json
args:
template_parameters:
KeyName: jmartin
DiskType: ephemeral
InstanceType: m1.small
ClusterSize: 3
requirements: [ "boto" ]
author: James S. Martin
'''
import boto.cloudformation.connection
import json
class Region:
def __init__(self, region):
self.name = region
self.endpoint = 'cloudformation.%s.amazonaws.com' % region
def boto_exception(err):
if hasattr(err, 'error_message'):
error = err.error_message
elif hasattr(err, 'message'):
error = err.message
else:
error = '%s: %s' % (Exception, err)
try:
error_msg = json.loads(error)
except:
error_msg = {'Error': error}
return error_msg
def stack_operation(cfn, stack_name, operation):
existed = []
result = {}
operation_complete = False
while operation_complete == False:
try:
stack = cfn.describe_stacks(stack_name)[0]
existed.append('yes')
except:
if 'yes' in existed:
result = {'changed': True, 'output': 'Stack Deleted'}
result['events'] = map(str, list(stack.describe_events()))
else:
result = {'changed': True, 'output': 'Stack Not Found'}
break
if '%s_COMPLETE' % operation == stack.stack_status:
result['changed'] = True
result['events'] = map(str, list(stack.describe_events()))
result['output'] = 'Stack %s complete' % operation
break
elif '%s_FAILED' % operation == stack.stack_status:
result['changed'] = False
result['events'] = map(str, list(stack.describe_events()))
result['output'] = 'Stack %s failed' % operation
break
else:
time.sleep(5)
return result
def main():
module = AnsibleModule(
argument_spec=dict(
stack_name=dict(required=True),
template_parameters=dict(required=False),
region=dict(required=True,
choices=['ap-northeast-1', 'ap-southeast-1',
'ap-southeast-2', 'eu-west-1',
'sa-east-1', 'us-east-1', 'us-west-1',
'us-west-2']),
state=dict(default='present', choices=['present', 'absent']),
template=dict(default=None, required=True),
disable_rollback=dict(default=False),
wait_for=dict(default=True)
)
)
wait_for = module.params['wait_for']
state = module.params['state']
stack_name = module.params['stack_name']
region = Region(module.params['region'])
template_body = open(module.params['template'], 'r').read()
disable_rollback = module.params['disable_rollback']
template_parameters = module.params['template_parameters']
template_parameters_tup = [(k, v) for k, v in template_parameters.items()]
stack_outputs = {}
stack_outputs[module.params['region']] = {}
stack_outputs[module.params['region']][stack_name] = {}
try:
cfn = boto.cloudformation.connection.CloudFormationConnection(
region=region)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg=str(e))
update = False
stack_events = []
result = {}
operation = None
output = ''
if state == 'present':
try:
cfn.create_stack(stack_name, parameters=template_parameters_tup,
template_body=template_body,
disable_rollback=disable_rollback,
capabilities=['CAPABILITY_IAM'])
operation = 'CREATE'
except Exception, err:
error_msg = boto_exception(err)
if error_msg['Error']['Code'] == 'AlreadyExistsException':
update = True
else:
result = {'changed': False, 'output': error_msg}
module.fail_json(**result)
if not update:
result = stack_operation(cfn, stack_name, operation)
if update:
try:
cfn.update_stack(stack_name, parameters=template_parameters_tup,
template_body=template_body,
disable_rollback=disable_rollback,
capabilities=['CAPABILITY_IAM'])
operation = 'UPDATE'
except Exception, err:
error_msg = boto_exception(err)
if error_msg['Error']['Message'] == 'No updates are to be performed.':
output = error_msg['Error']['Message']
result = {'changed': False, 'output': output}
if operation == 'UPDATE':
result = stack_operation(cfn, stack_name, operation)
if state == 'present' or update:
stack = cfn.describe_stacks(stack_name)[0]
for output in stack.outputs:
stack_outputs[module.params['region']][stack_name][
output.key] = output.value
result['stack_outputs'] = stack_outputs
# absent state is different because of the way delete_stack works.
# problem is it it doesn't give an error if stack isn't found
# so must describe the stack first
if state == 'absent':
try:
cfn.describe_stacks(stack_name)
operation = 'DELETE'
except Exception, err:
error_msg = boto_exception(err)
result = {'changed': False, 'output': error_msg}
module.fail_json(result)
if operation == 'DELETE':
cfn.delete_stack(stack_name)
result = stack_operation(cfn, stack_name, operation)
module.exit_json(**result)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()