Docker-Based Node Images Stopped Supporting

Containerd(Container-Optimized OS with containerd (cos_containerd)) has been the default runtime for all new GKE nodes since version 1.19 on Linux.

However, GKE Standard clusters also continued to support node images that used Docker as the runtime But the Docker-based node images that won't be supported in GKE version 1.24 and later.

As per the latest template release [templates-v0.9.3](https://github.com/GoogleCloudPlatform/solution-acceleration-toolkit/tree/templates-v0.9.3) look like you have to make change at the [safer-cluster-update-variant](https://github.com/GoogleCloudPlatform/solution-acceleration-toolkit/blob/templates-v0.9.3/templates/tfengine/components/resources/gke_clusters/main.tf) configuration template.

and for the existing cluster we can make the following changes to create the node images with Containerd(**Container-Optimized OS with containerd** (cos_containerd)).

node_pools = [
{
name = "default-node-pool"
image_type = "COS_CONTAINERD"
},