Can we run an executable jar file inside an already running Kubernetes pod?

java kubernetes jar executable-jar kubernetes-pod

You can try the kubectl cp command:

From the docs:

Copy /tmp/foo_dir local directory to /tmp/bar_dir in a remote pod inthe default namespace

kubectl cp /tmp/foo_dir <some-pod>:/tmp/bar_dir

Copy /tmp/foo local file to /tmp/bar in a remote pod in a specificcontainer

kubectl cp /tmp/foo <some-pod>:/tmp/bar -c <specific-container>

Copy /tmp/foo local file to /tmp/bar in a remote pod in namespace

kubectl cp /tmp/foo <some-namespace>/<some-pod>:/tmp/bar

Copy /tmp/foo from a remote pod to /tmp/bar locally

kubectl cp <some-namespace>/<some-pod>:/tmp/foo /tmp/bar

Once the executable is added inside the container, you can exec into the pod and execute the file manually.

java kubernetes jar executable-jar kubernetes-pod

To open up interactive bash terminal

kubectl exec <pod name> -n <namespace> -c <container name> -it bash

After this, find your executable jar and run it. once completed, exit the terminal.

You can run it directly.

kubectl exec <podname> -n <namespace> -c <container name> -- < command to run your jar >

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