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upgrading_to_v9.0.md

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Upgrading to v9.0

The v9.0 release of kubernetes-engine is a backwards incompatible release.

Provider Version

  • Support for Google provider versions older than v3.19 has been removed due to the introduction of GKE metering block support and CE PD CSI Driver features.

Beta Clusters

Beta clusters now defaults node_metadata to GKE_METADATA_SERVER for enabling Workload Identity by default.

If you would like to continue using SECURE you can override the default value.

module "gke" {
    source        = "terraform-google-modules/kubernetes-engine/google//modules/beta-public-cluster"
-   version       = "~> 8.0"
+   version       = "~> 9.0"
...
+   node_metadata = "SECURE"
}

ACM Module

The ACM module has been refactored and resources will be recreated; particularly note the recreation of tls_private_key if create_ssh_key is enabled.

- module.acm.tls_private_key.git_creds[0]
+ module.acm.module.acm_operator.tls_private_key.k8sop_creds[0]

Safer Cluster Module

For the Safer Cluster module, you must now specify release_channel instead of kubernetes_version. The release_channel can be chosen based on type of workload. For production workloads REGULAR is recommended or STABLE if stability is paramount.

More information about release channels can be found here.

Release notes for each release channel can be found here.