diff --git a/cloud/amazon/cloudwatchevent_rule.py b/cloud/amazon/cloudwatchevent_rule.py
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+#!/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: cloudwatchevent_rule
+short_description: Manage CloudWatch Event rules and targets
+description:
+ - This module creates and manages CloudWatch event rules and targets.
+version_added: "2.2"
+extends_documentation_fragment:
+ - aws
+author: "Jim Dalton (@jsdalton) "
+requirements:
+ - python >= 2.6
+ - boto3
+notes:
+ - A rule must contain at least an I(event_pattern) or I(schedule_expression). A
+ rule can have both an I(event_pattern) and a I(schedule_expression), in which
+ case the rule will trigger on matching events as well as on a schedule.
+ - When specifying targets, I(input) and I(input_path) are mutually-exclusive
+ and optional parameters.
+options:
+ name:
+ description:
+ - The name of the rule you are creating, updating or deleting. No spaces
+ or special characters allowed (i.e. must match C([\.\-_A-Za-z0-9]+))
+ required: true
+ schedule_expression:
+ description:
+ - A cron or rate expression that defines the schedule the rule will
+ trigger on. For example, C(cron(0 20 * * ? *)), C(rate(5 minutes))
+ required: false
+ event_pattern:
+ description:
+ - A string pattern (in valid JSON format) that is used to match against
+ incoming events to determine if the rule should be triggered
+ required: false
+ state:
+ description:
+ - Whether the rule is present (and enabled), disabled, or absent
+ choices: ["present", "disabled", "absent"]
+ default: present
+ required: false
+ description:
+ description:
+ - A description of the rule
+ required: false
+ role_arn:
+ description:
+ - The Amazon Resource Name (ARN) of the IAM role associated with the rule
+ required: false
+ targets:
+ description:
+ - "A dictionary array of targets to add to or update for the rule, in the
+ form C({ id: [string], arn: [string], input: [valid JSON string], input_path: [valid JSONPath string] }).
+ I(id) [required] is the unique target assignment ID. I(arn) (required)
+ is the Amazon Resource Name associated with the target. I(input)
+ (optional) is a JSON object that will override the event data when
+ passed to the target. I(input_path) (optional) is a JSONPath string
+ (e.g. C($.detail)) that specifies the part of the event data to be
+ passed to the target. If neither I(input) nor I(input_path) is
+ specified, then the entire event is passed to the target in JSON form."
+ required: false
+'''
+
+EXAMPLES = '''
+- cloudwatchevent_rule:
+ name: MyCronTask
+ schedule_expression: "cron(0 20 * * ? *)"
+ description: Run my scheduled task
+ targets:
+ - id: MyTargetId
+ arn: arn:aws:lambda:us-east-1:123456789012:function:MyFunction
+
+- cloudwatchevent_rule:
+ name: MyDisabledCronTask
+ schedule_expression: "cron(5 minutes)"
+ description: Run my disabled scheduled task
+ state: disabled
+ targets:
+ - id: MyOtherTargetId
+ arn: arn:aws:lambda:us-east-1:123456789012:function:MyFunction
+ input: '{"foo": "bar"}'
+
+- cloudwatchevent_rule: name=MyCronTask state=absent
+'''
+
+RETURN = '''
+rule:
+ description: CloudWatch Event rule data
+ returned: success
+ type: dict
+ sample: "{ 'arn': 'arn:aws:events:us-east-1:123456789012:rule/MyCronTask', 'description': 'Run my scheduled task', 'name': 'MyCronTask', 'schedule_expression': 'cron(0 20 * * ? *)', 'state': 'ENABLED' }"
+targets:
+ description: CloudWatch Event target(s) assigned to the rule
+ returned: success
+ type: list
+ sample: "[{ 'arn': 'arn:aws:lambda:us-east-1:123456789012:function:MyFunction', 'id': 'MyTargetId' }]"
+'''
+
+
+class CloudWatchEventRule(object):
+ def __init__(self, module, name, client, schedule_expression=None,
+ event_pattern=None, description=None, role_arn=None):
+ self.name = name
+ self.client = client
+ self.changed = False
+ self.schedule_expression = schedule_expression
+ self.event_pattern = event_pattern
+ self.description = description
+ self.role_arn = role_arn
+
+ def describe(self):
+ """Returns the existing details of the rule in AWS"""
+ try:
+ rule_info = self.client.describe_rule(Name=self.name)
+ except botocore.exceptions.ClientError, e:
+ error_code = e.response.get('Error', {}).get('Code')
+ if error_code == 'ResourceNotFoundException':
+ return {}
+ raise
+ return self._snakify(rule_info)
+
+ def put(self, enabled=True):
+ """Creates or updates the rule in AWS"""
+ request = {
+ 'Name': self.name,
+ 'State': "ENABLED" if enabled else "DISABLED",
+ }
+ if self.schedule_expression:
+ request['ScheduleExpression'] = self.schedule_expression
+ if self.event_pattern:
+ request['EventPattern'] = self.event_pattern
+ if self.description:
+ request['Description'] = self.description
+ if self.role_arn:
+ request['RoleArn'] = self.role_arn
+ response = self.client.put_rule(**request)
+ self.changed = True
+ return response
+
+ def delete(self):
+ """Deletes the rule in AWS"""
+ self.remove_all_targets()
+ response = self.client.delete_rule(Name=self.name)
+ self.changed = True
+ return response
+
+ def enable(self):
+ """Enables the rule in AWS"""
+ response = self.client.enable_rule(Name=self.name)
+ self.changed = True
+ return response
+
+ def disable(self):
+ """Disables the rule in AWS"""
+ response = self.client.disable_rule(Name=self.name)
+ self.changed = True
+ return response
+
+ def list_targets(self):
+ """Lists the existing targets for the rule in AWS"""
+ try:
+ targets = self.client.list_targets_by_rule(Rule=self.name)
+ except botocore.exceptions.ClientError, e:
+ error_code = e.response.get('Error', {}).get('Code')
+ if error_code == 'ResourceNotFoundException':
+ return []
+ raise
+ return self._snakify(targets)['targets']
+
+ def put_targets(self, targets):
+ """Creates or updates the provided targets on the rule in AWS"""
+ if not targets:
+ return
+ request = {
+ 'Rule': self.name,
+ 'Targets': self._targets_request(targets),
+ }
+ response = self.client.put_targets(**request)
+ self.changed = True
+ return response
+
+ def remove_targets(self, target_ids):
+ """Removes the provided targets from the rule in AWS"""
+ if not target_ids:
+ return
+ request = {
+ 'Rule': self.name,
+ 'Ids': target_ids
+ }
+ response = self.client.remove_targets(**request)
+ self.changed = True
+ return response
+
+ def remove_all_targets(self):
+ """Removes all targets on rule"""
+ targets = self.list_targets()
+ return self.remove_targets([t['id'] for t in targets])
+
+ def _targets_request(self, targets):
+ """Formats each target for the request"""
+ targets_request = []
+ for target in targets:
+ target_request = {
+ 'Id': target['id'],
+ 'Arn': target['arn']
+ }
+ if 'input' in target:
+ target_request['Input'] = target['input']
+ if 'input_path' in target:
+ target_request['InputPath'] = target['input_path']
+ targets_request.append(target_request)
+ return targets_request
+
+ def _snakify(self, dict):
+ """Converts cammel case to snake case"""
+ return camel_dict_to_snake_dict(dict)
+
+
+class CloudWatchEventRuleManager(object):
+ RULE_FIELDS = ['name', 'event_pattern', 'schedule_expression', 'description', 'role_arn']
+
+ def __init__(self, rule, targets):
+ self.rule = rule
+ self.targets = targets
+
+ def ensure_present(self, enabled=True):
+ """Ensures the rule and targets are present and synced"""
+ rule_description = self.rule.describe()
+ if rule_description:
+ # Rule exists so update rule, targets and state
+ self._sync_rule(enabled)
+ self._sync_targets()
+ self._sync_state(enabled)
+ else:
+ # Rule does not exist, so create new rule and targets
+ self._create(enabled)
+
+ def ensure_disabled(self):
+ """Ensures the rule and targets are present, but disabled, and synced"""
+ self.ensure_present(enabled=False)
+
+ def ensure_absent(self):
+ """Ensures the rule and targets are absent"""
+ rule_description = self.rule.describe()
+ if not rule_description:
+ # Rule doesn't exist so don't need to delete
+ return
+ self.rule.delete()
+
+ def fetch_aws_state(self):
+ """Retrieves rule and target state from AWS"""
+ aws_state = {
+ 'rule': {},
+ 'targets': [],
+ 'changed': self.rule.changed
+ }
+ rule_description = self.rule.describe()
+ if not rule_description:
+ return aws_state
+
+ # Don't need to include response metadata noise in response
+ del rule_description['response_metadata']
+
+ aws_state['rule'] = rule_description
+ aws_state['targets'].extend(self.rule.list_targets())
+ return aws_state
+
+ def _sync_rule(self, enabled=True):
+ """Syncs local rule state with AWS"""
+ if not self._rule_matches_aws():
+ self.rule.put(enabled)
+
+ def _sync_targets(self):
+ """Syncs local targets with AWS"""
+ # Identify and remove extraneous targets on AWS
+ target_ids_to_remove = self._remote_target_ids_to_remove()
+ if target_ids_to_remove:
+ self.rule.remove_targets(target_ids_to_remove)
+
+ # Identify targets that need to be added or updated on AWS
+ targets_to_put = self._targets_to_put()
+ if targets_to_put:
+ self.rule.put_targets(targets_to_put)
+
+ def _sync_state(self, enabled=True):
+ """Syncs local rule state with AWS"""
+ remote_state = self._remote_state()
+ if enabled and remote_state != 'ENABLED':
+ self.rule.enable()
+ elif not enabled and remote_state != 'DISABLED':
+ self.rule.disable()
+
+ def _create(self, enabled=True):
+ """Creates rule and targets on AWS"""
+ self.rule.put(enabled)
+ self.rule.put_targets(self.targets)
+
+ def _rule_matches_aws(self):
+ """Checks if the local rule data matches AWS"""
+ aws_rule_data = self.rule.describe()
+
+ # The rule matches AWS only if all rule data fields are equal
+ # to their corresponding local value defined in the task
+ return all([
+ getattr(self.rule, field) == aws_rule_data.get(field, None)
+ for field in self.RULE_FIELDS
+ ])
+
+ def _targets_to_put(self):
+ """Returns a list of targets that need to be updated or added remotely"""
+ remote_targets = self.rule.list_targets()
+ return [t for t in self.targets if t not in remote_targets]
+
+ def _remote_target_ids_to_remove(self):
+ """Returns a list of targets that need to be removed remotely"""
+ target_ids = [t['id'] for t in self.targets]
+ remote_targets = self.rule.list_targets()
+ return [
+ rt['id'] for rt in remote_targets if rt['id'] not in target_ids
+ ]
+
+ def _remote_state(self):
+ """Returns the remote state from AWS"""
+ description = self.rule.describe()
+ if not description:
+ return
+ return description['state']
+
+
+def get_cloudwatchevents_client(module):
+ """Returns a boto3 client for accessing CloudWatch Events"""
+ try:
+ region, ec2_url, aws_conn_kwargs = get_aws_connection_info(module,
+ boto3=True)
+ if not region:
+ module.fail_json(msg="Region must be specified as a parameter, in \
+ EC2_REGION or AWS_REGION environment variables \
+ or in boto configuration file")
+ return boto3_conn(module, conn_type='client',
+ resource='events',
+ region=region, endpoint=ec2_url,
+ **aws_conn_kwargs)
+ except boto3.exception.NoAuthHandlerFound, e:
+ module.fail_json(msg=str(e))
+
+
+def main():
+ argument_spec = ec2_argument_spec()
+ argument_spec.update(dict(
+ name = dict(required=True),
+ schedule_expression = dict(),
+ event_pattern = dict(),
+ state = dict(choices=['present', 'disabled', 'absent'],
+ default='present'),
+ description = dict(),
+ role_arn = dict(),
+ targets = dict(type='list', default=[]),
+ ))
+ module = AnsibleModule(argument_spec=argument_spec)
+
+ if not HAS_BOTO3:
+ module.fail_json(msg='boto3 required for this module')
+
+ rule_data = dict(
+ [(rf, module.params.get(rf)) for rf in CloudWatchEventRuleManager.RULE_FIELDS]
+ )
+ targets = module.params.get('targets')
+ state = module.params.get('state')
+
+ cwe_rule = CloudWatchEventRule(module,
+ client=get_cloudwatchevents_client(module),
+ **rule_data)
+ cwe_rule_manager = CloudWatchEventRuleManager(cwe_rule, targets)
+
+ if state == 'present':
+ cwe_rule_manager.ensure_present()
+ elif state == 'disabled':
+ cwe_rule_manager.ensure_disabled()
+ elif state == 'absent':
+ cwe_rule_manager.ensure_absent()
+ else:
+ module.fail_json(msg="Invalid state '{0}' provided".format(state))
+
+ module.exit_json(**cwe_rule_manager.fetch_aws_state())
+
+
+# import module snippets
+from ansible.module_utils.basic import *
+from ansible.module_utils.ec2 import *
+
+
+if __name__ == '__main__':
+ main()