Kubernetes prompt for zsh

A Kubernetes zsh prompt that displays the current cluster cluster and the namespace.

Inspired by several tools used to simplify usage of kubectl

NOTE: If you are not using zsh, check out kube-ps1 designed for bash as well as zsh.

Requirements

The default prompt assumes you have the kubectl command line utility installed. It can be obtained here:

Install and Set up kubectl

If using this with OpenShift, the oc tool needs installed. It can be obtained from here:

OC Client Tools

Helper utilities

There are several great tools that make using kubectl very enjoyable.

kubectx and kubenx are great for fast switching between clusters and namespaces.

Prompt Structure

The prompt layout is:

(<symbol>|<cluster>:<namespace>)

Enabling

In order to use kube-ps1 with Oh My Zsh, you'll need to enable them in the .zshrc file. You'll find the zshrc file in your $HOME directory. Open it with your favorite text editor and you'll see a spot to list all the plugins you want to load.

vim $HOME/.zshrc

Add kube-ps1 to the list of enabled plugins:

plugins=(
  git
  kube-ps1
)

Colors

Blue was used as the prefix to match the Kubernetes color as closely as possible. Red was chosen as the cluster name to stand out, and cyan for the namespace. These can of course be changed.

Customization

The default settings can be overridden in ~/.zshrc

Variable	Default	Meaning
`KUBE_PS1_BINARY`	`kubectl`	Default Kubernetes binary
`KUBE_PS1_PREFIX`	`(`	Prompt opening character
`KUBE_PS1_SYMBOL_ENABLE`	`true`	Display the prompt Symbol. If set to `false`, this will also disable `KUBE_PS1_SEPARATOR`
`KUBE_PS1_SYMBOL_DEFAULT`	`⎈`	Default prompt symbol. Unicode `\u2388`
`KUBE_PS1_SYMBOL_USE_IMG`	`false`	☸️ , Unicode `\u2638` as the prompt symbol
`KUBE_PS1_NS_ENABLE`	`true`	Display the namespace. If set to `false`, this will also disable `KUBE_PS1_DIVIDER`
`KUBE_PS1_SEPERATOR`	`\|`	Separator between symbol and cluster name
`KUBE_PS1_DIVIDER`	`:`	Separator between cluster and namespace
`KUBE_PS1_SUFFIX`	`)`	Prompt closing character

Contributors

Jared Yanovich

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