#!/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: cloudformation short_description: Create or delete an 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 disable_rollback: description: - If a stacks fails to form, rollback will remove the stack required: false default: "false" choices: [ "true", "false" ] template_parameters: description: - a list of hashes of all the template variables for the stack required: false default: {} 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 template: description: - The local path of the cloudformation template. This parameter is mutually exclusive with 'template_url'. Either one of them is required if "state" parameter is "present" Must give full path to the file, relative to the working directory. If using roles this may look like "roles/cloudformation/files/cloudformation-example.json" required: false default: null notification_arns: description: - The Simple Notification Service (SNS) topic ARNs to publish stack related events. required: false default: null version_added: "2.0" stack_policy: description: - the path of the cloudformation stack policy required: false default: null version_added: "1.9" tags: description: - Dictionary of tags to associate with stack and it's resources during stack creation. Cannot be updated later. Requires at least Boto version 2.6.0. required: false default: null version_added: "1.4" region: description: - The AWS region to use. If not specified then the value of the AWS_REGION or EC2_REGION environment variable, if any, is used. required: true aliases: ['aws_region', 'ec2_region'] version_added: "1.5" template_url: description: - Location of file containing the template body. The URL must point to a template (max size 307,200 bytes) located in an S3 bucket in the same region as the stack. This parameter is mutually exclusive with 'template'. Either one of them is required if "state" parameter is "present" required: false version_added: "2.0" template_format: description: For local templates, allows specification of json or yaml format default: json choices: [ json, yaml ] required: false version_added: "2.0" author: "James S. Martin (@jsmartin)" extends_documentation_fragment: aws ''' EXAMPLES = ''' # Basic task example - name: launch ansible cloudformation example cloudformation: stack_name: "ansible-cloudformation" state: "present" region: "us-east-1" disable_rollback: true template: "files/cloudformation-example.json" template_parameters: KeyName: "jmartin" DiskType: "ephemeral" InstanceType: "m1.small" ClusterSize: 3 tags: Stack: "ansible-cloudformation" # Basic role example - name: launch ansible cloudformation example cloudformation: stack_name: "ansible-cloudformation" state: "present" region: "us-east-1" disable_rollback: true template: "roles/cloudformation/files/cloudformation-example.json" template_parameters: KeyName: "jmartin" DiskType: "ephemeral" InstanceType: "m1.small" ClusterSize: 3 tags: Stack: "ansible-cloudformation" # Removal example - name: tear down old deployment cloudformation: stack_name: "ansible-cloudformation-old" state: "absent" # Use a template from a URL - name: launch ansible cloudformation example cloudformation: stack_name="ansible-cloudformation" state=present region=us-east-1 disable_rollback=true template_url=https://s3.amazonaws.com/my-bucket/cloudformation.template args: template_parameters: KeyName: jmartin DiskType: ephemeral InstanceType: m1.small ClusterSize: 3 tags: Stack: ansible-cloudformation ''' import json import time import yaml try: import boto import boto.cloudformation.connection HAS_BOTO = True except ImportError: HAS_BOTO = False def boto_exception(err): '''generic error message handler''' if hasattr(err, 'error_message'): error = err.error_message elif hasattr(err, 'message'): error = err.message else: error = '%s: %s' % (Exception, err) return error def boto_version_required(version_tuple): parts = boto.Version.split('.') boto_version = [] try: for part in parts: boto_version.append(int(part)) except: boto_version.append(-1) return tuple(boto_version) >= tuple(version_tuple) def stack_operation(cfn, stack_name, operation): '''gets the status of a stack while it is created/updated/deleted''' existed = [] result = {} operation_complete = False while operation_complete == False: try: stack = invoke_with_throttling_retries(cfn.describe_stacks, stack_name)[0] existed.append('yes') except: if 'yes' in existed: result = dict(changed=True, output='Stack Deleted', events=map(str, list(stack.describe_events()))) else: result = dict(changed= True, output='Stack Not Found') break if '%s_COMPLETE' % operation == stack.stack_status: result = dict(changed=True, events = map(str, list(stack.describe_events())), output = 'Stack %s complete' % operation) break if 'ROLLBACK_COMPLETE' == stack.stack_status or '%s_ROLLBACK_COMPLETE' % operation == stack.stack_status: result = dict(changed=True, failed=True, events = map(str, list(stack.describe_events())), output = 'Problem with %s. Rollback complete' % operation) break elif '%s_FAILED' % operation == stack.stack_status: result = dict(changed=True, failed=True, events = map(str, list(stack.describe_events())), output = 'Stack %s failed' % operation) break elif '%s_ROLLBACK_FAILED' % operation == stack.stack_status: result = dict(changed=True, failed=True, events = map(str, list(stack.describe_events())), output = 'Stack %s rollback failed' % operation) break else: time.sleep(5) return result IGNORE_CODE = 'Throttling' MAX_RETRIES=3 def invoke_with_throttling_retries(function_ref, *argv): retries=0 while True: try: retval=function_ref(*argv) return retval except boto.exception.BotoServerError, e: if e.code != IGNORE_CODE or retries==MAX_RETRIES: raise e time.sleep(5 * (2**retries)) retries += 1 def main(): argument_spec = ec2_argument_spec() argument_spec.update(dict( stack_name=dict(required=True), template_parameters=dict(required=False, type='dict', default={}), state=dict(default='present', choices=['present', 'absent']), template=dict(default=None, required=False), notification_arns=dict(default=None, required=False), stack_policy=dict(default=None, required=False), disable_rollback=dict(default=False, type='bool'), template_url=dict(default=None, required=False), template_format=dict(default='json', choices=['json', 'yaml'], required=False), tags=dict(default=None) ) ) module = AnsibleModule( argument_spec=argument_spec, mutually_exclusive=[['template_url', 'template']], ) if not HAS_BOTO: module.fail_json(msg='boto required for this module') if module.params['template'] is None and module.params['template_url'] is None: module.fail_json(msg='Either template or template_url expected') state = module.params['state'] stack_name = module.params['stack_name'] if module.params['template'] is None and module.params['template_url'] is None: if state == 'present': module.fail_json('Module parameter "template" or "template_url" is required if "state" is "present"') if module.params['template'] is not None: template_body = open(module.params['template'], 'r').read() else: template_body = None if module.params['template_format'] == 'yaml': if template_body is None: module.fail_json(msg='yaml format only supported for local templates') else: template_body = json.dumps(yaml.load(template_body), indent=2) notification_arns = module.params['notification_arns'] if module.params['stack_policy'] is not None: stack_policy_body = open(module.params['stack_policy'], 'r').read() else: stack_policy_body = None disable_rollback = module.params['disable_rollback'] template_parameters = module.params['template_parameters'] tags = module.params['tags'] template_url = module.params['template_url'] region, ec2_url, aws_connect_kwargs = get_aws_connection_info(module) kwargs = dict() if tags is not None: if not boto_version_required((2,6,0)): module.fail_json(msg='Module parameter "tags" requires at least Boto version 2.6.0') kwargs['tags'] = tags # convert the template parameters ansible passes into a tuple for boto template_parameters_tup = [(k, v) for k, v in template_parameters.items()] stack_outputs = {} try: cfn = boto.cloudformation.connect_to_region( region, **aws_connect_kwargs ) except boto.exception.NoAuthHandlerFound, e: module.fail_json(msg=str(e)) update = False result = {} operation = None # if state is present we are going to ensure that the stack is either # created or updated if state == 'present': try: cfn.create_stack(stack_name, parameters=template_parameters_tup, template_body=template_body, notification_arns=notification_arns, stack_policy_body=stack_policy_body, template_url=template_url, disable_rollback=disable_rollback, capabilities=['CAPABILITY_IAM'], **kwargs) operation = 'CREATE' except Exception, err: error_msg = boto_exception(err) if 'AlreadyExistsException' in error_msg or 'already exists' in error_msg: update = True else: module.fail_json(msg=error_msg) if not update: result = stack_operation(cfn, stack_name, operation) # if the state is present and the stack already exists, we try to update it # AWS will tell us if the stack template and parameters are the same and # don't need to be updated. if update: try: cfn.update_stack(stack_name, parameters=template_parameters_tup, template_body=template_body, notification_arns=notification_arns, stack_policy_body=stack_policy_body, disable_rollback=disable_rollback, template_url=template_url, capabilities=['CAPABILITY_IAM']) operation = 'UPDATE' except Exception, err: error_msg = boto_exception(err) if 'No updates are to be performed.' in error_msg: result = dict(changed=False, output='Stack is already up-to-date.') else: module.fail_json(msg=error_msg) if operation == 'UPDATE': result = stack_operation(cfn, stack_name, operation) # check the status of the stack while we are creating/updating it. # and get the outputs of the stack if state == 'present' or update: stack = invoke_with_throttling_retries(cfn.describe_stacks,stack_name)[0] for output in stack.outputs: stack_outputs[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: invoke_with_throttling_retries(cfn.describe_stacks,stack_name) operation = 'DELETE' except Exception, err: error_msg = boto_exception(err) if 'Stack:%s does not exist' % stack_name in error_msg: result = dict(changed=False, output='Stack not found.') else: module.fail_json(msg=error_msg) if operation == 'DELETE': cfn.delete_stack(stack_name) result = stack_operation(cfn, stack_name, operation) module.exit_json(**result) # import module snippets from ansible.module_utils.basic import * from ansible.module_utils.ec2 import * main()