chkube is a bash function that manages multiple kubectl configs using symlinks

README.md

chkube bash function

chkube is a bash function that manages multiple kubectl configs using symlinks

Setup

• copy this function to your bashrc aliases or functions file
• put all configs in ~/.kube/ with names like my-config.yaml (they must end in .yaml)
• symlink one of them to ~/.kube/config
• use chkube to manage them after that

Notes

If you don't want to use as a function and would prefer a script, change all the return statements to exit and copy the code inside the function into a file with a shebang

If you don't want to include the helper functions, you can replace all occurances of ohai, bullet, and error with echo and exclude them.

Example

chkube-function.sh

# chkube manages kubectl configs using symlinks
# To setup:
# - put all configs in ~/.kube/ with names like my-config.yaml
# - symlink one of them to ~/.kube/config
# - use chkube to manage them after that
chkube() {
  local conf="$HOME/.kube"

  if [[ ! -L "${conf}/config" ]]; then
    error "${conf}/config is not a symbolic link"
    echo
    ohai "To setup:"
    bullet "put all configs in ~/.kube/ with names like my-config.yaml"
    bullet "symlink one of them to ~/.kube/config"
    bullet "use chkube to manage them after that"
    return 1
  fi

  local current=$(basename $(readlink "${conf}/config") | cut -d . -f 1)
  local available=$(\ls "${conf}/" | grep yaml | cut -d . -f 1)

  if [[ "$1" == "" ]]; then
    ohai "Usage: chkube some-config"
    echo
    ohai "Available configs are"
    IFS=$'\n'
    for item in $available; do
      bullet "$item"
    done
    echo "Currently selected is $current"
    return 0
  else
    if [[ -f "${conf}/${1}.yaml" ]]; then
      rm "${conf}/config"
      ln -s "${conf}/${1}.yaml" ${conf}/config
      ohai "Set default config to $1"
    else
      error "$1 is not an available config"
      chkube
      return 1
    fi
  fi
}

helpers.sh

# Helper functions and string formatters

# string formatters
if [[ -t 1 ]]; then
  tty_escape() { printf "\033[%sm" "$1"; }
else
  tty_escape() { :; }
fi
tty_mkbold() { tty_escape "1;$1"; }
tty_underline="$(tty_escape "4;39")"
tty_blue="$(tty_mkbold 34)"
tty_yellow="$(tty_mkbold 33)"
tty_green="$(tty_mkbold 32)"
tty_red="$(tty_mkbold 31)"
tty_bold="$(tty_mkbold 39)"
tty_reset="$(tty_escape 0)"

shell_join() {
  local arg
  printf "%s" "$1"
  shift
  for arg in "$@"; do
    printf " "
    printf "%s" "${arg// /\ }"
  done
}

ohai() {
  printf "${tty_blue}==>${tty_bold} %s${tty_reset}\n" "$(shell_join "$@")"
}

bullet() {
  printf "${tty_yellow} ● ${tty_bold} %s${tty_reset}\n" "$(shell_join "$@")"
}

error() {
  printf "${tty_red}ERROR:${tty_bold} %s${tty_reset}\n" "$(shell_join "$@")"
}