#!/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: "false" choices: [ "true", "false" ] aliases: [] template_parameters: description: - a list of hashes of all the template variables for the stack required: false default: {} aliases: [] region: description: - The AWS region to use. If not specified then the value of the EC2_REGION environment variable, if any, is used. required: true default: null aliases: ['aws_region', 'ec2_region'] 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: [] 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 aliases: [] version_added: "1.4" 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: null aliases: [ 'ec2_secret_key', 'secret_key' ] version_added: "1.5" 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: null aliases: [ 'ec2_access_key', 'access_key' ] version_added: "1.5" region: description: - The AWS region to use. If not specified then the value of the EC2_REGION environment variable, if any, is used. required: false aliases: ['aws_region', 'ec2_region'] version_added: "1.5" requirements: [ "boto" ] author: James S. Martin ''' EXAMPLES = ''' # Basic task example tasks: - name: launch ansible cloudformation example action: cloudformation > stack_name="ansible-cloudformation" state=present region=us-east-1 disable_rollback=true template=files/cloudformation-example.json args: template_parameters: KeyName: jmartin DiskType: ephemeral InstanceType: m1.small ClusterSize: 3 tags: Stack: ansible-cloudformation ''' import json import time try: import boto import boto.cloudformation.connection except ImportError: print "failed=True msg='boto required for this module'" sys.exit(1) class Region: def __init__(self, region): '''connects boto to the region specified in the cloudformation template''' self.name = region self.endpoint = 'cloudformation.%s.amazonaws.com' % region 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 = 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 else: time.sleep(5) return result 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=True), disable_rollback=dict(default=False, type='bool'), tags=dict(default=None) ) ) module = AnsibleModule( argument_spec=argument_spec, ) state = module.params['state'] stack_name = module.params['stack_name'] template_body = open(module.params['template'], 'r').read() disable_rollback = module.params['disable_rollback'] template_parameters = module.params['template_parameters'] tags = module.params['tags'] ec2_url, aws_access_key, aws_secret_key, region = get_ec2_creds(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: cf_region = Region(region) cfn = boto.cloudformation.connection.CloudFormationConnection( aws_access_key_id=aws_access_key, aws_secret_access_key=aws_secret_key, region=cf_region, ) 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, 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, disable_rollback=disable_rollback, 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 = 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: 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()