Table of Contents

Set Up Alias

To integrate kswitch into your shell and expose relevant environment variables, add this alias to your.bashrc or .zshrc:

alias -- kswitch='source kswitch'

Script functionality

The script below allows you to seamlessly select and switch between Kubernetes configuration files located in your $HOME/.kube/ directory using fzf.

#!/usr/bin/env bash

SEARCH_PATH="$HOME/.kube/"
IGNORE_LIST=()

ignore=()
for i in "${IGNORE_LIST[@]}"; do
    ignore+=("!" "-path" "$i")
done

if [[ $# -eq 1 ]]; then
    selected="$1"
else
    files=$(find "$SEARCH_PATH" -mindepth 1 -maxdepth 1 -name '*config*' -type f "${ignore[@]}" 2>/dev/null)
    selected=$(fzf-tmux -p 85% --reverse --preview 'cat {}' <<<"${files[@]}" | sort -u)
fi

if [[ -z "$selected" ]]; then
    echo "No kubeconfig selected."
    exit 0
fi

export KUBECONFIG="$selected"
export KUBE_CONFIG_PATH="$selected"

selected_name=$(basename "$selected" | tr . _)
echo "Selected kubeconfig: $selected_name"

contexts=$(kubectl config get-contexts --kubeconfig="$selected" -o name)

if [[ -z "$contexts" ]]; then
    echo "No contexts found in $selected!"
    exit 1
fi

context_count=$(echo "$contexts" | wc -l)

if [[ "$context_count" -eq 1 ]]; then
    selected_context="$contexts"
    echo "Automatically selecting the only available context: $selected_context"
else
    selected_context=$(echo "$contexts" | fzf-tmux -p 60% --reverse)
    if [[ -z "$selected_context" ]]; then
        echo "No context selected."
        exit 0
    fi
fi

kubectl config use-context "$selected_context" --kubeconfig="$selected"

By setting up the alias and using this script, you can efficiently toggle between different Kubernetes configurations without having to manually change environment variables every time.