kube-bash-prompt.sh

#!/bin/bash
# configures bash prompt based on current kubernetes cluster context and namespace
# based on https://pracucci.com/display-the-current-kubelet-context-in-the-bash-prompt.html

__kube_ps1()
{
  CONTEXT=$(kubectl config view | grep current-context | awk '{ print $NF }' | awk -F '.' '{ print $1 }')
  NS=$(kubectl config view $(kubectl config current-context) | grep namespace | awk '{ print $2 }')
  if [ -n "$CONTEXT" ]; then
      echo "[${CONTEXT}][${NS}]"
  fi
}

NORMAL="\[\e[00m\]"     # Normal
BLACK="\[\e[0;30m\]"    # Black
RED="\[\e[1;31m\]"      # Red
GREEN="\[\e[0;32m\]"    # Green
YELLOW="\[\e[0;33m\]"   # Yellow
BLUE="\[\e[0;34m\]"     # Blue
PURPLE="\[\e[0;35m\]"   # Purple
CYAN="\[\e[0;36m\]"     # Cyan
WHITE="\[\e[0;37m\]"    # White

export PS1="${BLUE}\h:${PURPLE}\$(__kube_ps1) ${BLUE}\W> ${NORMAL}"

# results:
# Cronos:[dev1][qa1] mydirectory>
#         ||    ||
# Hostname:[cluster][namespace] currentdir>