Restart container within pod

Question

I have a pod test-1495806908-xn5jn with 2 containers. I'd like to restart one of them called container-test. Is it possible to restart a single container within a pod and how? If not, how do I restart the pod?

The pod was created using a deployment.yaml with:

kubectl create -f deployment.yaml

Answer 1

There was an issue in coredns pod, I deleted such pod by

kubectl delete pod -n=kube-system coredns-fb8b8dccf-8ggcf

Its pod will restart automatically.

Answer 2

Is it possible to restart a single container

Not through kubectl, although depending on the setup of your cluster you can "cheat" and docker kill the-sha-goes-here, which will cause kubelet to restart the "failed" container (assuming, of course, the restart policy for the Pod says that is what it should do)

how do I restart the pod

That depends on how the Pod was created, but based on the Pod name you provided, it appears to be under the oversight of a ReplicaSet, so you can just kubectl delete pod test-1495806908-xn5jn and kubernetes will create a new one in its place (the new Pod will have a different name, so do not expect kubectl get pods to return test-1495806908-xn5jn ever again)

Answer 3

All the above answers have mentioned deleting the pod...but if you have many pods of the same service then it would be tedious to delete each one of them...

Therefore, I propose the following solution, restart:

• 1) Set scale to zero :

   kubectl scale deployment <<name>> --replicas=0 -n service 
  

  The above command will terminate all your pods with the name <<name>>

• 2) To start the pod again, set the replicas to more than 0

  kubectl scale deployment <<name>> --replicas=2 -n service
  

  The above command will start your pods again with 2 replicas.