Add support for cgroupMode option under linux_node_config for GKE nodes

[arpitairan]

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Description

GKE has made the use of cgroup v2 the default since GKE v1.26 and has added the Linux cgroup mode configuration options to allow customers to change from the default CGROUP_MODE_V2 to CGROUP_MODE_V1 to avoid issues like Node memory usage on cgroupv2 reported higher than cgroupv1.

The option to manage the cgroup mode configuration under LinuxNodeConfig seems to be missing from the Terraform Google Provider.

Please add the cgroup_mode option under linux_node_config similar to how Upstream support for Kubelet and Linux Node configurations in GKE was added.

New or Affected Resource(s)

• google_container_cluster
• google_container_node_pool

Potential Terraform Configuration

resource "google_container_cluster" "primary" {
  ...
  node_config {
     ...
    linux_node_config {
      sysctls {
        ...
      }
      cgroup_mode = string
    }
  }
}

References

• Linux cgroup mode configuration options
• LinuxNodeConfig
• Upstream support for Kubelet and Linux Node configurations in GKE

b/299312482

[toVersus]

I submitted the PR to add this feature. See GoogleCloudPlatform/magic-modules#8997.

[github-actions]

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