Missed "UpdatePolicy" Attribute in resource "aws_autoscaling_group"

[ozbillwang]

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Description

Missed UpdatePolicy Attribute in resource aws_autoscaling_group

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-updatepolicy.html#cfn-attributes-updatepolicy-replacingupdate

New or Affected Resource(s)

• aws_autoscaling_group

Potential Terraform Configuration

"UpdatePolicy" : {
  "AutoScalingReplacingUpdate" : {
    "WillReplace" : Boolean
  }
}

"UpdatePolicy" : {
  "AutoScalingRollingUpdate" : {
    "MaxBatchSize" : Integer,
    "MinInstancesInService" : Integer,
    "MinSuccessfulInstancesPercent" : Integer
    "PauseTime" : String,
    "SuspendProcesses" : [ List of processes ],
    "WaitOnResourceSignals" : Boolean
  }
}

References

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-updatepolicy.html#cfn-attributes-updatepolicy-replacingupdate

• #0000

[ozbillwang]

I have the feeling, that this issue has been identified before, so someone worked around it with a CFN template.

#4577

#4432

#5273

[bflad]

Hi @ozbillwang 👋 Can you point to the API reference documentation for which
API actions/parameters would handle this? I feel like the last time I looked this up, it seemed like this was something only built into CloudFormation and not part of the API, but maybe I missed it or the situation has changed.

[ozbillwang]

@bflad

Thanks to point this. I have confirmed with AWS via support ticket. This feature is only in Cloudformation, not in API currently, a ticket had been raised to API team to add this feature, but not sure when it can be implemented.

In fact, this UpdatePolicy calls API to adjust desired capacity, so we have to use Cloudformation template with this feature in Terraform currently, otherwise, frequently adjust desired capacity (for example, increase 2, wait, decrease 2, until all instances to be replaced with new setting).

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!