Feature: Kubernetes context/namespace switching

[roele]

I'm working on a custom function which lets you easily switch between contexts and namespaces in Kubernetes. It's still a work in progress as kubectl has some weird behaviours and error handling is a bit cumbersome. Nevertheless i want to share a first version here.

#
# fzf k8s function
# __________________________
#

function _fzf_k8s_ctx_ns

  if not type -q kubectl
    set_color red
    echo "_fzf_k8s_ctx_ns: kubectl not found." >&2
    set_color normal
    return 1
  end

  set ctx (
    kubectl config get-contexts --no-headers=true | 
      awk '{print $2}' | 
      _fzf_wrapper --query=(commandline --current-token) $fzf_shell_vars_opts
  )

  command kubectl cluster-info 1> /dev/null
  if test $status -ne 0
    return $status
  end

  if test $status -eq 0
    command kubectl config use-context $ctx 1> /dev/null
  end

  set ns (
    kubectl get namespaces --no-headers=true | 
      awk '{print $1}' | 
      _fzf_wrapper --query=(commandline --current-token) $fzf_shell_vars_opts
  )

  if test $status -eq 0
    command kubectl config set-context --current --namespace $ns 1> /dev/null
  end

  commandline --function repaint

end

Once defined you can bind the function to keys of your preference.

function fish_user_key_bindings
  bind \ck _fzf_k8s_ctx_ns           # Ctrl-k
end

Known issues:

• If connection error occurs after kubectl cluster-info an additional ENTER is required to exit.