请求在Terraform中支持GKE集群创建时的release-channel特性

I totally get where you're coming from—using GKE's release channels to automate cluster upgrades is super handy, and it's frustrating when Terraform doesn't support a feature that's already available via the gcloud CLI.

Let's break this down clearly:

• First, the working gcloud command for spinning up a GKE cluster with a release channel (for automatic upgrades) is:

  gcloud alpha container clusters create [CLUSTER-NAME] \
    --zone [ZONE] \
    [ADDITIONAL-FLAGS] \
    --release-channel rapid
  

  This leverages GKE's managed upgrade system, where your cluster will automatically update according to the channel you choose (rapid, regular, or stable).

• Right now, the official Terraform Google provider doesn't include native support for the release_channel parameter in the google_container_cluster resource. That means you can't configure this directly in your Terraform manifests yet.

Workarounds & Next Steps #

If you need this functionality immediately, here are a few practical options:

1. Use a local-exec provisioner: You can invoke the gcloud command directly from Terraform using local-exec to create the cluster. Just be mindful of authentication and state management—this bypasses Terraform's native resource tracking, so you'll need to handle edge cases carefully.
2. Submit a feature request: Head to the Terraform Google provider's GitHub repo and file a feature request for release channel support. Maintainers prioritize features based on community demand, so sharing your specific use case will help move this forward.
3. Check alpha/beta provider versions: Experimental features sometimes land in alpha or beta versions of the provider before full release. It's worth scanning the latest provider documentation to see if this has been added recently.

Once support is implemented, we'd expect to see a configuration block like this in the google_container_cluster resource:

resource "google_container_cluster" "example" {
  name     = "my-cluster"
  location = "us-central1-a"

  release_channel {
    channel = "RAPID" # Valid values: "RAPID", "REGULAR", "STABLE"
  }

  # Additional cluster configuration...
}

内容的提问来源于stack exchange，提问作者Thomas Seehofchen