kubectl exec [POD] [COMMAND] is DEPRECATED

[achton]

When running a command like kexn test varnish-529679cb57-mjn62 bash it translates to kubectl exec -i -t --namespace test varnish-529679cb57-mjn62 bash and kubectl returns a deprecation warning:

kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl kubectl exec [POD] -- [COMMAND] instead.

The problem is that --namespace is a positional argument, but to fix this issue it will need to not be last, but come before the --. See https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#exec

[ahmetb]

I believe this is something we cannot fix. Take this for example:

alias kex='kubectl exec -i -t'

Because you need to provide POD before --, alias cannot add that -- for you. We need a bash function for that.

Though, I'm not planning to add bash functions, and I might actually remove exec functionality from this since there are only 2 aliases about this kex and kexn. Thoughts?

[francilioaraujo]

@ahmetb , I think kex and kexn are great aliases. If the user adds the -- between pod's name and the command, then the deprecation warning is not shown. Maybe you could just add a note in README.md about this issue

[wanddynosios]

The old syntax has been removed with v1.31.0. I fixed it for zsh like this:

alias kex='f() { kubectl exec $1 -i -t -- "${@:2}"};f' #manual edit

[howardjohn]

The old syntax has been removed with v1.31.0. I fixed it for zsh like this:

alias kex='f() { kubectl exec $1 -i -t -- "${@:2}"};f' #manual edit

The nice part about the old usage is you can do kex -some-flag ls, kex -some-flag -- ls, kex -- ls, kex ls -- all options availble.

Now this is impossible. I opened an upstream issue to revert it, though I wouldn't expect much. kubernetes/kubectl#1687.