Ensure GCP Kubernetes cluster node auto-repair configuration is enabled

Error: GCP Kubernetes cluster node auto-repair configuration is disabled

Bridgecrew Policy ID: BC_GCP_KUBERNETES_4
Checkov Check ID: CKV_GCP_9
Severity: LOW

GCP Kubernetes cluster node auto-repair configuration is disabled

Description

Auto-repairing mode in GKE is an automated service that identifies and repairs a failing node to maintain a healthy running state. GKE makes periodic checks on the health state of each node in the cluster. If a node fails consecutive health checks over an extended time period, GKE initiates a repair process for that node.

We recommend automatic node repair is enabled on kubernetes clusters to provide continued operation of mission critical nodes and ensuring applications are operating based on their pre-defined specs, minimized downstream failures and redundant alerting and triage.

Fix - Runtime

Gcloud CLI

Use the following command line to enable the node-pool automatic repair feature:

gcloud container node-pools update pool-name 
--cluster cluster-name \
--zone compute-zone \
--enable-autorepair

More information here: https://cloud.google.com/kubernetes-engine/docs/how-to/node-auto-repai

Fix - Buildtime

Terraform

Add the following code bloc into your google_container_node_pool resource:

  management {
    auto_repair  = true
  }

If you don't have a separated node-pool resource on your terraform codebase, you can refer to the Gcloud CLI part. You will first need to recover the name of the node pool through the console or the CLI. Please be reminded that it is best practice to delete the default node-pool from the cluster and to create a specific one using the google_container_node_pool resource.

More information here: https://cloud.google.com/kubernetes-engine/docs/how-to/node-auto-repair


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