kubectl bash completion for alias with options - alias

Question

I have several kubectl aliases configured:
alias k='kubectl'
alias kn='kubectl -n'
alias ks='kubectl -n kube-system'
alias ka='kubectl get --all-namespaces'
Bash completion works fine for kubectl and I got it working for most of the aliases as well by calling
complete -o default -F __start_kubectl $alias
This does however not work for the ka alias - the completion ignores that the get is already part of the alias and completes the command as if it wasn't there.
Is it possible to configure the completion to also work for the ka alias?
OS is a docker container using Ubuntu 16:04 as base image.

Answer 1

When aliasing kubectl use = options
From https://github.com/kubernetes/website/issues/31824#issue-1146171318
Setting flags/options in your alias requires the = format
Hence aliases should be created as follows:
alias k='kubectl'
alias kn='kubectl --namespace='
alias ks='kubectl --namespace=kube-system'
alias ka='kubectl --all-namespaces get'
alias kp="kubectl --kubeconfig=~/.kube/production.kubeconfig --namespace=prod"
$ kubectl version
Client Version: version.Info{Major:"1", Minor:"23",
GitVersion:"v1.23.5",
GitCommit:"c285e781331a3785a7f436042c65c5641ce8a9e9",
GitTreeState:"clean", BuildDate:"2022-03-16T15:58:47Z",
GoVersion:"go1.17.8", Compiler:"gc", Platform:"linux/amd64"}