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ec2_asg_instance_refresh and ec2_asg_instance_refresh_info modules (#973
) ec2_asg_instance_refresh and ec2_asg_instance_refresh_info modules SUMMARY Reviving original PR that adds Autoscaling instance refresh API support as the author has yet not updated PR based on review feedback. Issue: #135 PR being revived: #795 Fixes #135 ISSUE TYPE New Module Pull Request COMPONENT NAME ec2_asg_instance_refresh ec2_asg_instance_refreshes_info ADDITIONAL INFORMATION More about the feature: https://aws.amazon.com/blogs/compute/introducing-instance-refresh-for-ec2-auto-scaling/ Boto3 documentation: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/autoscaling.html#AutoScaling.Client.start_instance_refresh Reviewed-by: Alina Buzachis <None> Reviewed-by: Mandar Kulkarni <[email protected]> Reviewed-by: Mark Woolley <[email protected]> Reviewed-by: Jill R <None> Reviewed-by: Joseph Torcasso <None>
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| #!/usr/bin/python | ||
| # Copyright: Ansible Project | ||
| # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) | ||
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| from __future__ import absolute_import, division, print_function | ||
| __metaclass__ = type | ||
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| DOCUMENTATION = ''' | ||
| --- | ||
| module: ec2_asg_instance_refresh | ||
| version_added: 3.2.0 | ||
| short_description: Start or cancel an EC2 Auto Scaling Group (ASG) instance refresh in AWS | ||
| description: | ||
| - Start or cancel an EC2 Auto Scaling Group instance refresh in AWS. | ||
| - Can be used with M(community.aws.ec2_asg_instance_refresh_info) to track the subsequent progress. | ||
| author: "Dan Khersonsky (@danquixote)" | ||
| options: | ||
| state: | ||
| description: | ||
| - Desired state of the ASG. | ||
| type: str | ||
| required: true | ||
| choices: [ 'started', 'cancelled' ] | ||
| name: | ||
| description: | ||
| - The name of the auto scaling group you are searching for. | ||
| type: str | ||
| required: true | ||
| strategy: | ||
| description: | ||
| - The strategy to use for the instance refresh. The only valid value is C(Rolling). | ||
| - A rolling update is an update that is applied to all instances in an Auto Scaling group until all instances have been updated. | ||
| - A rolling update can fail due to failed health checks or if instances are on standby or are protected from scale in. | ||
| - If the rolling update process fails, any instances that were already replaced are not rolled back to their previous configuration. | ||
| type: str | ||
| default: 'Rolling' | ||
| preferences: | ||
| description: | ||
| - Set of preferences associated with the instance refresh request. | ||
| - If not provided, the default values are used. | ||
| - For I(min_healthy_percentage), the default value is C(90). | ||
| - For I(instance_warmup), the default is to use the value specified for the health check grace period for the Auto Scaling group. | ||
| - Can not be specified when I(state) is set to 'cancelled'. | ||
| required: false | ||
| suboptions: | ||
| min_healthy_percentage: | ||
| description: | ||
| - Total percent of capacity in ASG that must remain healthy during instance refresh to allow operation to continue. | ||
| - It is rounded up to the nearest integer. | ||
| type: int | ||
| default: 90 | ||
| instance_warmup: | ||
| description: | ||
| - The number of seconds until a newly launched instance is configured and ready to use. | ||
| - During this time, Amazon EC2 Auto Scaling does not immediately move on to the next replacement. | ||
| - The default is to use the value for the health check grace period defined for the group. | ||
| type: int | ||
| type: dict | ||
| extends_documentation_fragment: | ||
| - amazon.aws.aws | ||
| - amazon.aws.ec2 | ||
| ''' | ||
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| EXAMPLES = ''' | ||
| # Note: These examples do not set authentication details, see the AWS Guide for details. | ||
| - name: Start a refresh | ||
| community.aws.ec2_asg_instance_refresh: | ||
| name: some-asg | ||
| state: started | ||
| - name: Cancel a refresh | ||
| community.aws.ec2_asg_instance_refresh: | ||
| name: some-asg | ||
| state: cancelled | ||
| - name: Start a refresh and pass preferences | ||
| community.aws.ec2_asg_instance_refresh: | ||
| name: some-asg | ||
| state: started | ||
| preferences: | ||
| min_healthy_percentage: 91 | ||
| instance_warmup: 60 | ||
| ''' | ||
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| RETURN = ''' | ||
| --- | ||
| instance_refresh_id: | ||
| description: instance refresh id | ||
| returned: success | ||
| type: str | ||
| sample: "08b91cf7-8fa6-48af-b6a6-d227f40f1b9b" | ||
| auto_scaling_group_name: | ||
| description: Name of autoscaling group | ||
| returned: success | ||
| type: str | ||
| sample: "public-webapp-production-1" | ||
| status: | ||
| description: | ||
| - The current state of the group when DeleteAutoScalingGroup is in progress. | ||
| - The following are the possible statuses | ||
| - Pending -- The request was created, but the operation has not started. | ||
| - InProgress -- The operation is in progress. | ||
| - Successful -- The operation completed successfully. | ||
| - Failed -- The operation failed to complete. You can troubleshoot using the status reason and the scaling activities. | ||
| - Cancelling -- | ||
| - An ongoing operation is being cancelled. | ||
| - Cancellation does not roll back any replacements that have already been completed, | ||
| - but it prevents new replacements from being started. | ||
| - Cancelled -- The operation is cancelled. | ||
| returned: success | ||
| type: str | ||
| sample: "Pending" | ||
| start_time: | ||
| description: The date and time this ASG was created, in ISO 8601 format. | ||
| returned: success | ||
| type: str | ||
| sample: "2015-11-25T00:05:36.309Z" | ||
| end_time: | ||
| description: The date and time this ASG was created, in ISO 8601 format. | ||
| returned: success | ||
| type: str | ||
| sample: "2015-11-25T00:05:36.309Z" | ||
| percentage_complete: | ||
| description: the % of completeness | ||
| returned: success | ||
| type: int | ||
| sample: 100 | ||
| instances_to_update: | ||
| description: num. of instance to update | ||
| returned: success | ||
| type: int | ||
| sample: 5 | ||
| ''' | ||
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| try: | ||
| from botocore.exceptions import BotoCoreError, ClientError | ||
| except ImportError: | ||
| pass # caught by AnsibleAWSModule | ||
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| from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule | ||
| from ansible_collections.amazon.aws.plugins.module_utils.ec2 import AWSRetry | ||
| from ansible_collections.amazon.aws.plugins.module_utils.ec2 import camel_dict_to_snake_dict | ||
| from ansible_collections.amazon.aws.plugins.module_utils.core import scrub_none_parameters | ||
| from ansible.module_utils.common.dict_transformations import snake_dict_to_camel_dict | ||
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| def start_or_cancel_instance_refresh(conn, module): | ||
| """ | ||
| Args: | ||
| conn (boto3.AutoScaling.Client): Valid Boto3 ASG client. | ||
| module: AnsibleAWSModule object | ||
| Returns: | ||
| { | ||
| "instance_refreshes": [ | ||
| { | ||
| 'auto_scaling_group_name': 'ansible-test-hermes-63642726-asg', | ||
| 'instance_refresh_id': '6507a3e5-4950-4503-8978-e9f2636efc09', | ||
| 'instances_to_update': 1, | ||
| 'percentage_complete': 0, | ||
| "preferences": { | ||
| "instance_warmup": 60, | ||
| "min_healthy_percentage": 90, | ||
| "skip_matching": false | ||
| }, | ||
| 'start_time': '2021-02-04T03:39:40+00:00', | ||
| 'status': 'Cancelling', | ||
| 'status_reason': 'Replacing instances before cancelling.', | ||
| } | ||
| ] | ||
| } | ||
| """ | ||
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| asg_state = module.params.get('state') | ||
| asg_name = module.params.get('name') | ||
| preferences = module.params.get('preferences') | ||
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| args = {} | ||
| args['AutoScalingGroupName'] = asg_name | ||
| if asg_state == 'started': | ||
| args['Strategy'] = module.params.get('strategy') | ||
| if preferences: | ||
| if asg_state == 'cancelled': | ||
| module.fail_json(msg='can not pass preferences dict when canceling a refresh') | ||
| _prefs = scrub_none_parameters(preferences) | ||
| args['Preferences'] = snake_dict_to_camel_dict(_prefs, capitalize_first=True) | ||
| cmd_invocations = { | ||
| 'cancelled': conn.cancel_instance_refresh, | ||
| 'started': conn.start_instance_refresh, | ||
| } | ||
| try: | ||
| if module.check_mode: | ||
| if asg_state == 'started': | ||
| ongoing_refresh = conn.describe_instance_refreshes(AutoScalingGroupName=asg_name).get('InstanceRefreshes', '[]') | ||
| if ongoing_refresh: | ||
| module.exit_json(changed=False, msg='In check_mode - Instance Refresh is already in progress, can not start new instance refresh.') | ||
| else: | ||
| module.exit_json(changed=True, msg='Would have started instance refresh if not in check mode.') | ||
| elif asg_state == 'cancelled': | ||
| ongoing_refresh = conn.describe_instance_refreshes(AutoScalingGroupName=asg_name).get('InstanceRefreshes', '[]')[0] | ||
| if ongoing_refresh.get('Status', '') in ['Cancelling', 'Cancelled']: | ||
| module.exit_json(changed=False, msg='In check_mode - Instance Refresh already cancelled or is pending cancellation.') | ||
| elif not ongoing_refresh: | ||
| module.exit_json(chaned=False, msg='In check_mode - No active referesh found, nothing to cancel.') | ||
| else: | ||
| module.exit_json(changed=True, msg='Would have cancelled instance refresh if not in check mode.') | ||
| result = cmd_invocations[asg_state](aws_retry=True, **args) | ||
| instance_refreshes = conn.describe_instance_refreshes(AutoScalingGroupName=asg_name, InstanceRefreshIds=[result['InstanceRefreshId']]) | ||
| result = dict( | ||
| instance_refreshes=camel_dict_to_snake_dict(instance_refreshes['InstanceRefreshes'][0]) | ||
| ) | ||
| return module.exit_json(**result) | ||
| except (BotoCoreError, ClientError) as e: | ||
| module.fail_json_aws( | ||
| e, | ||
| msg='Failed to {0} InstanceRefresh'.format( | ||
| asg_state.replace('ed', '') | ||
| ) | ||
| ) | ||
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| def main(): | ||
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| argument_spec = dict( | ||
| state=dict( | ||
| type='str', | ||
| required=True, | ||
| choices=['started', 'cancelled'], | ||
| ), | ||
| name=dict(required=True), | ||
| strategy=dict( | ||
| type='str', | ||
| default='Rolling', | ||
| required=False | ||
| ), | ||
| preferences=dict( | ||
| type='dict', | ||
| required=False, | ||
| options=dict( | ||
| min_healthy_percentage=dict(type='int', default=90), | ||
| instance_warmup=dict(type='int'), | ||
| ) | ||
| ), | ||
| ) | ||
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| module = AnsibleAWSModule( | ||
| argument_spec=argument_spec, | ||
| supports_check_mode=True, | ||
| ) | ||
| autoscaling = module.client( | ||
| 'autoscaling', | ||
| retry_decorator=AWSRetry.jittered_backoff( | ||
| retries=10, | ||
| catch_extra_error_codes=['InstanceRefreshInProgress'] | ||
| ) | ||
| ) | ||
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| start_or_cancel_instance_refresh(autoscaling, module) | ||
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| if __name__ == '__main__': | ||
| main() |
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