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Tips and Tricks

Kubernetes Context & Namespace Picker with FZF​

A fast and interactive way to switch Kubernetes contexts and namespaces directly from your terminal, with Starship prompt support.

Prerequisites​

Function to Switch Contexts​

Add this to your ~/.bashrc or ~/.zshrc:

Function details
kc() {
  local ctx
  if [ "$#" -eq 0 ]; then
    ctx=$(kubectl config get-contexts -o=name | fzf)
  else
    ctx=$(kubectl config get-contexts -o=name | fzf -e -1 -q "$1")
  fi

  if [ -n "$ctx" ]; then
    kubectl config use-context "$ctx"
  fi
}

Usage:

kc          # interactive selection
kc prod     # pre-filled filter "prod"

Function to Switch Namespaces​

Add this to your ~/.bashrc or ~/.zshrc:

Function details
kn() {
  local ns
  if [ "$#" -eq 0 ]; then
    ns=$(kubectl get ns -o jsonpath='{.items[*].metadata.name}' | tr ' ' '\n' | fzf)
  else
    ns=$(kubectl get ns -o jsonpath='{.items[*].metadata.name}' | tr ' ' '\n' | fzf -q "$1" -e -1)
  fi

  if [ -n "$ns" ]; then
    kubectl config set-context --current --namespace="$ns"
  fi
}

Usage:

kn              # interactive namespace selection
kn monitoring   # switch to "monitoring" namespace

Starship Prompt Configuration​

Add to ~/.config/starship.toml:

[kubernetes]
format = '[$symbol$context(::$namespace)]($style) '
symbol = "☸ "
disabled = false

Result in the prompt:

☸ k3s-rpi::monitoring
  • Namespace is only shown if it is not default
  • You can customize symbol and format as desired