Graceful System Reboot

Important

This section is relevant only if the cluster and applications are already deployed, and you need to reboot the system or if the system gets rebooted unexpectedly.

Before Rebooting

Scale down the deployments.

Run the following command to scale down the deployments, which ensures that all pods are terminated gracefully before the system reboot:

kubectl scale deployment --all --replicas=0

After Rebooting

Scale up the deployments.

After the system reboots, wait for the cluster to fully initialize. Then, scale up the deployments by running the following command:

kubectl scale deployment --all --replicas=1

This command sets all deployments to one replica.

Recovery Procedure

If the system gets rebooted without following the steps for a graceful reboot, wait for the CNS stack to initialize completely. Then remove all pods that do not have the Running status by using the following command:

kubectl delete pods --field-selector status.phase!=Running