Change GKE Container Timezone

By default GKE Cluster with container image is using UTC+0 timezone, to change the timezone we need to use k8tz installed to the cluster. You can check the details of k8tz on their github page here https://github.com/k8tz/k8tz

This example use GKE Private cluster with Access control plane using its external IP address enable.

First open Cloud Shell.

Check cloud shell external IP address using this command

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dig +short myip.opendns.com @resolver1.opendns.com

Add cloud shell external IP to the cluster.

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gcloud container clusters update CLUSTER_NAME \
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    --zone CLUSTER_ZONE_LOCATION \
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    --project PROJECT_ID \
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    --enable-master-authorized-networks \
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    --master-authorized-networks CLOUDSHELL_IP/32,

Connect to the cluster.

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gcloud container clusters get-credentials CLUSTER_NAME \
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    --zone CLUSTER_ZONE_LOCATION \
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    --project PROJECT_ID

Install k8tz to the cluster using helm charts by running the following command:

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helm repo add k8tz https://k8tz.github.io/k8tz/
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helm install k8tz k8tz/k8tz --set timezone=Asia/Jakarta

don’t forget to change the timezone with your timezone.

Inject k8tz to the deployments or statefulsets using the following command:

• For statefulsets

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  kubectl get statefulset -oyaml -n kubemq | \
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      ./k8tz inject -tAsia/Jakarta - | kubectl apply -f -

• For deployments

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  kubectl get deploy -oyaml -n kubemq | \
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      ./k8tz inject -tAsia/Jakarta - | kubectl apply -f -

After that you can verify the timezone by run date command inside the pods using kubectl exec.