GKE Autopilot updates in place on every apply with no config changes

[TomTeece]

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Terraform Version

Terraform v1.1.6
on darwin_amd64

• provider registry.terraform.io/hashicorp/google v4.11.0
• provider registry.terraform.io/hashicorp/null v3.1.0
• provider registry.terraform.io/hashicorp/random v3.1.0

Affected Resource(s)

google_container_cluster

Terraform Configuration Files

resource "google_container_cluster" "autopilot-cluster" {
  name               = "autopilot-cluster"
  location           = "europe-west2"
  enable_autopilot   = true
  project            = google_project.project.project_id
  initial_node_count = 1
  network            = resource.google_compute_network.default.id
  private_cluster_config {
    enable_private_nodes    = "true"
    enable_private_endpoint = "true"
    master_ipv4_cidr_block  = "<cidr>"
  }
  master_authorized_networks_config {
    cidr_blocks {
      cidr_block   = "<cidr>"
      display_name = "default europe-west2"
    }
  }
}

Debug Output

Panic Output

Expected Behavior

On terraform apply after nothing has changed to terraform config there should be no update to google_container_cluster.autopilot-cluster

Actual Behavior

On every terraform apply the cluster is updated in place . The vertical_pod_autoscaling.enabled = true is set to null on every apply. See the output below.

This does not effect the vertical_pod_autoscaling of the cluster but is not correct. In autopilot Vertical Pod autoscaling is enabled by default so it should be enabled by default when enable_autopilot = true - https://cloud.google.com/kubernetes-engine/docs/how-to/vertical-pod-autoscaling

  # google_container_cluster.autopilot-cluster will be updated in-place
  ~ resource "google_container_cluster" "autopilot-cluster" {
        id                          = "projects/<project-id>/locations/europe-west2/clusters/autopilot-cluster"
        name                        = "autopilot-cluster"
        # (25 unchanged attributes hidden)

      - vertical_pod_autoscaling {
          - enabled = true -> null
        }

        # (17 unchanged blocks hidden)
    }

Steps to Reproduce

1. terraform apply

Important Factoids

References

[github-actions]

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