Duplicate an Existing K8s Pod-CodePudding

In a namespace foo there is an existing pod running

$ kubectl get pods -n foo

NAME                      READY     STATUS    RESTARTS   AGE
hello-1816639685-xejyk    1/1       Running   0          6d3h

How can we duplicate the hello pod so that we can try out things in this duplicated pod without affecting the original pod?

CodePudding user response：

You can get the pod manifest using YAML output from kubectl and create a new pod based on that specification.

For example

kubectl get pod hello-1816639685-xejyk -n foo -o yaml

You need to use a different name or namespace, since the name must be unique.

CodePudding user response：

Based on the naming convention, that pod looks like it's a deployment, so you should be able to scale up an additional replica (or replicas) using

kubectl scale deployment/hello-1816639685 --replicas=2

However, this is assuming you haven't added something like a persistent disk to the deployment (which then won't work with the additional replica)