Import Lambda alias module from https://github.com/pjodouin/ansible-lambda (#2829)
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Ryan Brown
Matt Clay
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1 changed files with 384 additions and 0 deletions
384
lib/ansible/modules/extras/cloud/amazon/lambda_alias.py
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384
lib/ansible/modules/extras/cloud/amazon/lambda_alias.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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try:
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import boto3
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from botocore.exceptions import ClientError, ParamValidationError, MissingParametersError
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HAS_BOTO3 = True
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except ImportError:
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HAS_BOTO3 = False
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DOCUMENTATION = '''
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---
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module: lambda_alias
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short_description: Creates, updates or deletes AWS Lambda function aliases.
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description:
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- This module allows the management of AWS Lambda functions aliases via the Ansible
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framework. It is idempotent and supports "Check" mode. Use module M(lambda) to manage the lambda function
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itself and M(lambda_event) to manage event source mappings.
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version_added: "2.2"
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author: Pierre Jodouin (@pjodouin), Ryan Scott Brown (@ryansb)
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options:
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function_name:
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description:
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- The name of the function alias.
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required: true
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state:
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description:
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- Describes the desired state.
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required: true
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default: "present"
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choices: ["present", "absent"]
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name:
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description:
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- Name of the function alias.
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required: true
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aliases: ['alias_name']
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description:
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description:
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- A short, user-defined function alias description.
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required: false
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version:
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description:
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- Version associated with the Lambda function alias.
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A value of 0 (or omitted parameter) sets the alias to the $LATEST version.
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required: false
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aliases: ['function_version']
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requirements:
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- boto3
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extends_documentation_fragment:
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- aws
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'''
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EXAMPLES = '''
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---
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# Simple example to create a lambda function and publish a version
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- hosts: localhost
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gather_facts: no
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vars:
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state: present
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project_folder: /path/to/deployment/package
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deployment_package: lambda.zip
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account: 123456789012
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production_version: 5
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tasks:
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- name: AWS Lambda Function
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lambda:
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state: "{{ state | default('present') }}"
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name: myLambdaFunction
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publish: True
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description: lambda function description
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code_s3_bucket: package-bucket
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code_s3_key: "lambda/{{ deployment_package }}"
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local_path: "{{ project_folder }}/{{ deployment_package }}"
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runtime: python2.7
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timeout: 5
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handler: lambda.handler
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memory_size: 128
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role: "arn:aws:iam::{{ account }}:role/API2LambdaExecRole"
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- name: show results
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debug: var=lambda_facts
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# The following will set the Dev alias to the latest version ($LATEST) since version is omitted (or = 0)
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- name: "alias 'Dev' for function {{ lambda_facts.FunctionName }} "
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lambda_alias:
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state: "{{ state | default('present') }}"
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function_name: "{{ lambda_facts.FunctionName }}"
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name: Dev
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description: Development is $LATEST version
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# The QA alias will only be created when a new version is published (i.e. not = '$LATEST')
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- name: "alias 'QA' for function {{ lambda_facts.FunctionName }} "
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lambda_alias:
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state: "{{ state | default('present') }}"
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function_name: "{{ lambda_facts.FunctionName }}"
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name: QA
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version: "{{ lambda_facts.Version }}"
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description: "QA is version {{ lambda_facts.Version }}"
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when: lambda_facts.Version != "$LATEST"
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# The Prod alias will have a fixed version based on a variable
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- name: "alias 'Prod' for function {{ lambda_facts.FunctionName }} "
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lambda_alias:
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state: "{{ state | default('present') }}"
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function_name: "{{ lambda_facts.FunctionName }}"
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name: Prod
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version: "{{ production_version }}"
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description: "Production is version {{ production_version }}"
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'''
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RETURN = '''
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---
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alias_arn:
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description: Full ARN of the function, including the alias
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returned: success
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type: string
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sample: arn:aws:lambda:us-west-2:123456789012:function:myFunction:dev
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description:
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description: A short description of the alias
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returned: success
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type: string
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sample: The development stage for my hot new app
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function_version:
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description: The qualifier that the alias refers to
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returned: success
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type: string
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sample: $LATEST
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name:
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description: The name of the alias assigned
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returned: success
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type: string
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sample: dev
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'''
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class AWSConnection:
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"""
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Create the connection object and client objects as required.
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"""
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def __init__(self, ansible_obj, resources, boto3=True):
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try:
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self.region, self.endpoint, aws_connect_kwargs = get_aws_connection_info(ansible_obj, boto3=boto3)
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self.resource_client = dict()
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if not resources:
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resources = ['lambda']
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resources.append('iam')
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for resource in resources:
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aws_connect_kwargs.update(dict(region=self.region,
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endpoint=self.endpoint,
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conn_type='client',
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resource=resource
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))
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self.resource_client[resource] = boto3_conn(ansible_obj, **aws_connect_kwargs)
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# if region is not provided, then get default profile/session region
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if not self.region:
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self.region = self.resource_client['lambda'].meta.region_name
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except (ClientError, ParamValidationError, MissingParametersError) as e:
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ansible_obj.fail_json(msg="Unable to connect, authorize or access resource: {0}".format(e))
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try:
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self.account_id = self.resource_client['iam'].get_user()['User']['Arn'].split(':')[4]
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except (ClientError, ValueError, KeyError, IndexError):
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self.account_id = ''
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def client(self, resource='lambda'):
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return self.resource_client[resource]
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def pc(key):
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"""
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Changes python key into Pascale case equivalent. For example, 'this_function_name' becomes 'ThisFunctionName'.
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:param key:
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:return:
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"""
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return "".join([token.capitalize() for token in key.split('_')])
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def set_api_params(module, module_params):
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"""
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Sets module parameters to those expected by the boto3 API.
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:param module:
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:param module_params:
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:return:
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"""
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api_params = dict()
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for param in module_params:
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module_param = module.params.get(param, None)
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if module_param:
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api_params[pc(param)] = module_param
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return api_params
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def validate_params(module, aws):
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"""
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Performs basic parameter validation.
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:param module: Ansible module reference
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:param aws: AWS client connection
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:return:
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"""
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function_name = module.params['function_name']
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# validate function name
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if not re.search('^[\w\-:]+$', function_name):
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module.fail_json(
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msg='Function name {0} is invalid. Names must contain only alphanumeric characters and hyphens.'.format(function_name)
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)
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if len(function_name) > 64:
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module.fail_json(msg='Function name "{0}" exceeds 64 character limit'.format(function_name))
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# if parameter 'function_version' is zero, set it to $LATEST, else convert it to a string
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if module.params['function_version'] == 0:
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module.params['function_version'] = '$LATEST'
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else:
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module.params['function_version'] = str(module.params['function_version'])
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return
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def get_lambda_alias(module, aws):
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"""
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Returns the lambda function alias if it exists.
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:param module: Ansible module reference
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:param aws: AWS client connection
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:return:
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"""
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client = aws.client('lambda')
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# set API parameters
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api_params = set_api_params(module, ('function_name', 'name'))
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# check if alias exists and get facts
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try:
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results = client.get_alias(**api_params)
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except (ClientError, ParamValidationError, MissingParametersError) as e:
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if e.response['Error']['Code'] == 'ResourceNotFoundException':
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results = None
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else:
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module.fail_json(msg='Error retrieving function alias: {0}'.format(e))
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return results
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def lambda_alias(module, aws):
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"""
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Adds, updates or deletes lambda function aliases.
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:param module: Ansible module reference
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:param aws: AWS client connection
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:return dict:
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"""
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client = aws.client('lambda')
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results = dict()
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changed = False
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current_state = 'absent'
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state = module.params['state']
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facts = get_lambda_alias(module, aws)
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if facts:
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current_state = 'present'
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if state == 'present':
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if current_state == 'present':
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# check if alias has changed -- only version and description can change
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alias_params = ('function_version', 'description')
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for param in alias_params:
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if module.params.get(param) != facts.get(pc(param)):
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changed = True
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break
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if changed:
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api_params = set_api_params(module, ('function_name', 'name'))
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api_params.update(set_api_params(module, alias_params))
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if not module.check_mode:
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try:
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results = client.update_alias(**api_params)
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except (ClientError, ParamValidationError, MissingParametersError) as e:
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module.fail_json(msg='Error updating function alias: {0}'.format(e))
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else:
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# create new function alias
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api_params = set_api_params(module, ('function_name', 'name', 'function_version', 'description'))
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try:
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if not module.check_mode:
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results = client.create_alias(**api_params)
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changed = True
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except (ClientError, ParamValidationError, MissingParametersError) as e:
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module.fail_json(msg='Error creating function alias: {0}'.format(e))
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else: # state = 'absent'
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if current_state == 'present':
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# delete the function
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api_params = set_api_params(module, ('function_name', 'name'))
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try:
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if not module.check_mode:
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results = client.delete_alias(**api_params)
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changed = True
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except (ClientError, ParamValidationError, MissingParametersError) as e:
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module.fail_json(msg='Error deleting function alias: {0}'.format(e))
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return dict(changed=changed, **dict(results or facts))
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def main():
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"""
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Main entry point.
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:return dict: ansible facts
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"""
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argument_spec = ec2_argument_spec()
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argument_spec.update(
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dict(
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state=dict(required=False, default='present', choices=['present', 'absent']),
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function_name=dict(required=True, default=None),
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name=dict(required=True, default=None, aliases=['alias_name']),
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function_version=dict(type='int', required=False, default=0, aliases=['version']),
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description=dict(required=False, default=None),
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)
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)
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module = AnsibleModule(
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argument_spec=argument_spec,
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supports_check_mode=True,
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mutually_exclusive=[],
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required_together=[]
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)
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# validate dependencies
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if not HAS_BOTO3:
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module.fail_json(msg='boto3 is required for this module.')
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aws = AWSConnection(module, ['lambda'])
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validate_params(module, aws)
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results = lambda_alias(module, aws)
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module.exit_json(**camel_dict_to_snake_dict(results))
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# ansible import module(s) kept at ~eof as recommended
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from ansible.module_utils.basic import *
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from ansible.module_utils.ec2 import *
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if __name__ == '__main__':
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main()
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