Permadiff on monitoring_config.enable_components due to list ordering

[pfuhrmann]

Description

monitoring_config.enable_components causes a permanent diff on every terraform plan because the GCP API returns the components in a different order than Terraform sends them.

Steps to reproduce

1. Create a GKE cluster with monitoring_enabled_components = ["DEPLOYMENT", "HPA", "POD", "STATEFULSET", "STORAGE", "SYSTEM_COMPONENTS"]
2. Run terraform apply — succeeds
3. Run terraform plan — shows a diff reordering the list

Expected behavior

No diff after a successful apply.

Actual behavior

~ enable_components = [
    - "SYSTEM_COMPONENTS",
    - "STORAGE",
    + "DEPLOYMENT",
      "HPA",
      "POD",
    - "DEPLOYMENT",
      "STATEFULSET",
    + "STORAGE",
    + "SYSTEM_COMPONENTS",
  ]

Suggested fix

Use sort() on enable_components in cluster.tf line 115, or convert to TypeSet in the provider schema.

Versions

• terraform-google-kubernetes-engine v44.0.0
• hashicorp/google ~> 7.0
• Terraform >= 1.5.0