Terraform tries to update google_compute_instance_template instead of recreating

[danpospisil]

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request.
• Please do not leave +1 or me too comments, they generate extra noise for issue followers and do not help prioritize the request.
• If you are interested in working on this issue or have submitted a pull request, please leave a comment.
• If an issue is assigned to the modular-magician user, it is either in the process of being autogenerated, or is planned to be autogenerated soon. If an issue is assigned to a user, that user is claiming responsibility for the issue. If an issue is assigned to hashibot, a community member has claimed the issue already.

When trying to update network_interface - access_config - network_tier option, terraform tries to update the resource instead of destroying and recreating the resource

Terraform Version

Terraform v0.12.24

• provider.google v3.20.0

Affected Resource(s)

• google_compute_instance_template

Terraform Configuration Files

Original:

resource "google_compute_instance_template" "instance_template" {
  machine_type = "e2-micro"
  disk {
    source_image = "debian-cloud/debian-9"
  }
  network_interface {
    network = "default"
    access_config {
        network_tier = "STANDARD"
    }
  }
  lifecycle {
    create_before_destroy = true
  }
}

Update after original was applied:

resource "google_compute_instance_template" "instance_template" {
  machine_type = "e2-micro"
  disk {
    source_image = "debian-cloud/debian-9"
  }
  network_interface {
    network = "default"
    access_config {
        network_tier = "PREMIUM"
    }
  }
  lifecycle {
    create_before_destroy = true
  }
}

Expected Behavior

Instance template should be recreated - not updated

Actual Behavior

Terraform tries to update the resource:

google_compute_instance_template.instance_template: Modifying... [id=projects/terraform-test-274919/global/instanceTemplates/terraform-20200507210144048800000001]

Error: doesn't support update

  on main.tf line 14, in resource "google_compute_instance_template" "instance_template":
  14: resource "google_compute_instance_template" "instance_template" {

Steps to Reproduce

Create google_compute_instance_template with network_tier set to STANDARD
run apply
change the network_tier option to PREMIUM
apply will fail

Important Factoids

This was supposed to fixed in PR#11548 but it doesnt seem to work

References

hashicorp/terraform#11548

[edwardmedia]

@ndmckinley I can repro above issue with Error: doesn't support update
Additional Info:

1. if I change other attributes (like adding metadata) along with the upgrade on network_tier, the apply succeeds. PREMIUM is showing up on network_tier
2. changes on create_before_destroy appear not working.

[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. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 [email protected]. Thanks!