New module cloudformation_facts (#2329)
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jmenga
Ryan Brown
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1474bde864
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1f79c357da
1 changed files with 274 additions and 0 deletions
274
cloud/amazon/cloudformation_facts.py
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274
cloud/amazon/cloudformation_facts.py
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#!/usr/bin/python
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: cloudformation_facts
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short_description: Obtain facts about an AWS CloudFormation stack
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description:
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- Gets information about an AWS CloudFormation stack
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requirements:
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- boto3 >= 1.0.0
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- python >= 2.6
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version_added: "2.2"
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author: Justin Menga (@jmenga)
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options:
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stack_name:
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description:
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- The name or id of the CloudFormation stack
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required: true
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all_facts:
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description:
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- Get all stack information for the stack
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required: false
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default: false
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stack_events:
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description:
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- Get stack events for the stack
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required: false
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default: false
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stack_template:
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description:
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- Get stack template body for the stack
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required: false
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default: false
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stack_resources:
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description:
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- Get stack resources for the stack
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required: false
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default: false
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stack_policy:
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description:
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- Get stack policy for the stack
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required: false
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default: false
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extends_documentation_fragment:
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- aws
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- ec2
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'''
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EXAMPLES = '''
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# Note: These examples do not set authentication details, see the AWS Guide for details.
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# Get summary information about a stack
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- cloudformation_facts:
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stack_name: my-cloudformation-stack
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# Facts are published in ansible_facts['cloudformation'][<stack_name>]
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- debug: msg={{ ansible_facts['cloudformation']['my-cloudformation-stack'] }}
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# Get all stack information about a stack
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- cloudformation_facts:
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stack_name: my-cloudformation-stack
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all_facts: true
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# Get stack resource and stack policy information about a stack
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- cloudformation_facts:
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stack_name: my-cloudformation-stack
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stack_resources: true
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stack_policy: true
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# Example dictionary outputs for stack_outputs, stack_parameters and stack_resources:
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"stack_outputs": {
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"ApplicationDatabaseName": "dazvlpr01xj55a.ap-southeast-2.rds.amazonaws.com",
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...
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},
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"stack_parameters": {
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"DatabaseEngine": "mysql",
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"DatabasePassword": "****",
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...
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},
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"stack_resources": {
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"AutoscalingGroup": "dev-someapp-AutoscalingGroup-1SKEXXBCAN0S7",
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"AutoscalingSecurityGroup": "sg-abcd1234",
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"ApplicationDatabase": "dazvlpr01xj55a",
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"EcsTaskDefinition": "arn:aws:ecs:ap-southeast-2:123456789:task-definition/dev-someapp-EcsTaskDefinition-1F2VM9QB0I7K9:1"
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...
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}
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'''
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RETURN = '''
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stack_description:
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description: Summary facts about the stack
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returned: always
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type: dict
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stack_outputs:
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description: Dictionary of stack outputs keyed by the value of each output 'OutputKey' parameter and corresponding value of each output 'OutputValue' parameter
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returned: always
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type: dict
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stack_parameters:
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description: Dictionary of stack parameters keyed by the value of each parameter 'ParameterKey' parameter and corresponding value of each parameter 'ParameterValue' parameter
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returned: always
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type: dict
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stack_events:
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description: All stack events for the stack
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returned: only if all_facts or stack_events is true
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type: list of events
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stack_policy:
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description: Describes the stack policy for the stack
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returned: only if all_facts or stack_policy is true
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type: dict
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stack_template:
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description: Describes the stack template for the stack
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returned: only if all_facts or stack_template is true
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type: dict
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stack_resource_list:
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description: Describes stack resources for the stack
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returned: only if all_facts or stack_resourses is true
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type: list of resources
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stack_resources:
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description: Dictionary of stack resources keyed by the value of each resource 'LogicalResourceId' parameter and corresponding value of each resource 'PhysicalResourceId' parameter
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returned: only if all_facts or stack_resourses is true
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type: dict
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'''
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try:
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import boto3
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import botocore
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HAS_BOTO3 = True
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except ImportError:
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HAS_BOTO3 = False
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from ansible.module_utils.ec2 import get_aws_connection_info, ec2_argument_spec
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from ansible.module_utils.basic import AnsibleModule
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from functools import partial
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import json
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import traceback
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class CloudFormationServiceManager:
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"""Handles CloudFormation Services"""
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def __init__(self, module):
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self.module = module
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try:
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region, ec2_url, aws_connect_kwargs = get_aws_connection_info(module, boto3=True)
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self.client = boto3.client('cloudformation', region_name=region, **aws_connect_kwargs)
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except botocore.exceptions.NoRegionError:
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self.module.fail_json(msg="Region must be specified as a parameter, in AWS_DEFAULT_REGION environment variable or in boto configuration file")
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except Exception as e:
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self.module.fail_json(msg="Can't establish connection - " + str(e), exception=traceback.format_exc(e))
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def describe_stack(self, stack_name):
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try:
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func = partial(self.client.describe_stacks,StackName=stack_name)
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response = self.paginated_response(func, 'Stacks')
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if response:
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return response[0]
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self.module.fail_json(msg="Error describing stack - an empty response was returned")
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except Exception as e:
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self.module.fail_json(msg="Error describing stack - " + str(e), exception=traceback.format_exc(e))
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def list_stack_resources(self, stack_name):
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try:
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func = partial(self.client.list_stack_resources,StackName=stack_name)
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return self.paginated_response(func, 'StackResourceSummaries')
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except Exception as e:
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self.module.fail_json(msg="Error listing stack resources - " + str(e), exception=traceback.format_exc(e))
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def describe_stack_events(self, stack_name):
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try:
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func = partial(self.client.describe_stack_events,StackName=stack_name)
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return self.paginated_response(func, 'StackEvents')
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except Exception as e:
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self.module.fail_json(msg="Error describing stack events - " + str(e), exception=traceback.format_exc(e))
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def get_stack_policy(self, stack_name):
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try:
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response = self.client.get_stack_policy(StackName=stack_name)
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stack_policy = response.get('StackPolicyBody')
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if stack_policy:
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return json.loads(stack_policy)
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return dict()
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except Exception as e:
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self.module.fail_json(msg="Error getting stack policy - " + str(e), exception=traceback.format_exc(e))
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def get_template(self, stack_name):
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try:
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response = self.client.get_template(StackName=stack_name)
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return response.get('TemplateBody')
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except Exception as e:
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self.module.fail_json(msg="Error getting stack template - " + str(e), exception=traceback.format_exc(e))
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def paginated_response(self, func, result_key, next_token=None):
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'''
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Returns expanded response for paginated operations.
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The 'result_key' is used to define the concatenated results that are combined from each paginated response.
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'''
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args=dict()
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if next_token:
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args['NextToken'] = next_token
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response = func(**args)
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result = response.get(result_key)
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next_token = response.get('NextToken')
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if not next_token:
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return result
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return result + self.paginated_response(func, result_key, next_token)
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def to_dict(items, key, value):
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''' Transforms a list of items to a Key/Value dictionary '''
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if items:
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return dict(zip([i[key] for i in items], [i[value] for i in items]))
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else:
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return dict()
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def main():
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argument_spec = ec2_argument_spec()
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argument_spec.update(dict(
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stack_name=dict(required=True, type='str' ),
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all_facts=dict(required=False, default=False, type='bool'),
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stack_policy=dict(required=False, default=False, type='bool'),
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stack_events=dict(required=False, default=False, type='bool'),
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stack_resources=dict(required=False, default=False, type='bool'),
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stack_template=dict(required=False, default=False, type='bool'),
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))
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module = AnsibleModule(argument_spec=argument_spec, supports_check_mode=False)
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if not HAS_BOTO3:
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module.fail_json(msg='boto3 is required.')
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# Describe the stack
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service_mgr = CloudFormationServiceManager(module)
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stack_name = module.params.get('stack_name')
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result = {
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'ansible_facts': { 'cloudformation': { stack_name:{} } }
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}
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facts = result['ansible_facts']['cloudformation'][stack_name]
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facts['stack_description'] = service_mgr.describe_stack(stack_name)
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# Create stack output and stack parameter dictionaries
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if facts['stack_description']:
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facts['stack_outputs'] = to_dict(facts['stack_description'].get('Outputs'), 'OutputKey', 'OutputValue')
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facts['stack_parameters'] = to_dict(facts['stack_description'].get('Parameters'), 'ParameterKey', 'ParameterValue')
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# Create optional stack outputs
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all_facts = module.params.get('all_facts')
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if all_facts or module.params.get('stack_resources'):
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facts['stack_resource_list'] = service_mgr.list_stack_resources(stack_name)
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facts['stack_resources'] = to_dict(facts.get('stack_resource_list'), 'LogicalResourceId', 'PhysicalResourceId')
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if all_facts or module.params.get('stack_template'):
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facts['stack_template'] = service_mgr.get_template(stack_name)
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if all_facts or module.params.get('stack_policy'):
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facts['stack_policy'] = service_mgr.get_stack_policy(stack_name)
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if all_facts or module.params.get('stack_events'):
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facts['stack_events'] = service_mgr.describe_stack_events(stack_name)
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result['changed'] = False
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module.exit_json(ansible_facts=result)
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if __name__ == '__main__':
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main()
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