How do I force delete kubernetes pods?

To clean the pods you need to delete their deployments namespace.

First discover that deployments existed:

$ kubectl get deployments --all-namespaces
NAME                               READY     STATUS        RESTARTS   AGE
chetabahana-web-584b95d576-62ccj   1/1       Running       0          20m
tutorial-web-56fbccc56b-wbwjq      1/1       Running       0          1m

Delete the deployment <NAME>-xxxx like this:

$ kubectl delete deployment <NAME>

For example to delete tutorial-web-56fbccc56b-wbwjq run:

$ kubectl delete deployment tutorial

Then all corresponded pods of tutorial-xxxx will terminate by itself.

NAME                               READY     STATUS        RESTARTS   AGE
chetabahana-web-584b95d576-62ccj   1/1       Running       0          20m
tutorial-web-56fbccc56b-wbwjq      0/1       Terminating   0          1m