[aws_autoscaling_group] Attaching/Detaching a lot of loadbalancers fails

[hashibot]

This issue was originally opened by @freeman as hashicorp/terraform#8718. It was migrated here as part of the provider split. The original body of the issue is below.

---

Hello,

We heavily use modules in our terraform stacks.
When updating some core modules this resulted in massive updates to the load balancers attached to some of our autoscaling groups and we are getting this error:

* aws_autoscaling_group.web: [WARN] Error updating Load Balancers for AutoScaling Group (DEV-AS-XXX-WEB), error: ValidationError: Trying to update too many Load Balancers/Target Groups at once. The limit is 10
    status code: 400, request id: xxx3fc5c-751b-11e6-8d48-bf41d1251xxx

Terraform Version

Using terraform v0.7.3

Affected Resource(s)

• aws_autoscaling_group

Expected Behavior

The update should have succeded

Actual Behavior

We got the error mentionned earlier

Steps to Reproduce

Please list the steps required to reproduce the issue, for example:

1. Create an infrastructure with more than 10 load balancers attached to an autoscaling group
2. terraform apply
3. You will get the error mentionned

From looking at the source this happens here

According to Auto Scaling Limits this will also be an issue with target groups.

I guess the feature request is for terraform to proceed in batches of 10 modifications at a time.

[cemo]

Is there any workaround for this issue? :)

[kladiv]

+1

[beezly]

This still exists in 2.17.0

[bflad]

Pull request for batching target_group_arns updates (thanks @beezly!): #10435
Pull request for batching load_balancers updates: #10445

[bflad]

The fix to batch large target_group_arns updates has been merged and will release with version 2.32.0 of the Terraform AWS Provider, later today. The fix to batch large load_balancers updates should land shortly, but potentially not in today's release. I'll post an update in this issue once that one is merged as well.

[ghost]

This has been released in version 2.32.0 of the Terraform AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template for triage. Thanks!

[bflad]

Just to followup here, the similar change to load_balancers handling has been merged as well and will release with version 2.35.0 of the Terraform AWS Provider, next Thursday. 👍

[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!