How to restart a failed pod in kubernetes deployment

Solution 1:

kubectl delete pod <podname> it will delete this one pod and Deployment/StatefulSet/ReplicaSet/DaemonSet will reschedule a new one in its place

Solution 2:

There are other possibilities to acheive what you want:

• Just use rollout command

  kubectl rollout restart deployment mydeploy

• You can set some environment variable which will force your deployment pods to restart:

  kubectl set env deployment mydeploy DEPLOY_DATE="$(date)"

• You can scale your deployment to zero, and then back to some positive value

    kubectl scale deployment mydeploy --replicas=0
    kubectl scale deployment mydeploy --replicas=1

Solution 3:

Just for others reading this...

A better solution (IMHO) is to implement a liveness prob that will force the pod to restart the container if it fails the probe test.

This is a great feature K8s offers out of the box. This is auto healing.

Also look into the pod lifecycle docs.

Solution 4:

kubectl -n <namespace> delete pods --field-selector=status.phase=Failed

I think the above command is quite useful when you want to restart 1 or more failed pods :D

And we don't need to care about name of the failed pod.