Kubectl Plugins and Krew

Krew helps you discover and install kubectl plugins on your machine.

There are a lot of kubectl plugins you can install and use to enhance your Kubernetes experience.

Prerequisites: A recent copy of the git command (such as available from the IUS repo) must be installed for krew to operate.

Let’s get started:

1. Install and set up Krew on your machine and add krew's bin directory to your path

(
 set -x; cd "$(mktemp -d)" &&
 OS="$(uname | tr '[:upper:]' '[:lower:]')" &&
 ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" &&
 KREW="krew-${OS}_${ARCH}" &&
 curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/${KREW}.tar.gz" &&
 tar zxvf "${KREW}.tar.gz" &&
 ./"${KREW}" install krew
)

export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"

2. Download the plugin list:

kubectl krew update

3. Discover plugins available on Krew:

kubectl krew search
NAME                            DESCRIPTION                                         INSTALLED
access-matrix                   Show an RBAC access matrix for server resources     no
advise-psp                      Suggests PodSecurityPolicies for cluster.           no
auth-proxy                      Authentication proxy to a pod or service            no
[...]

4. Choose a plugin from the list and install it:

kubectl krew install access-matrix

5. Use the installed plugin:

kubectl access-matrix

6. Keep your plugins up-to-date:

kubectl krew upgrade

7. Uninstall a plugin you no longer use:

kubectl krew uninstall access-matrix

This is pretty much all you need to know as a user to use Krew. Interesting plugins already installed and useful include:

Plugin	Description	Documentation/source
ctx	Switch between contexts in your kubeconfig	https://github.com/ahmetb/kubectx
ns	Switch between Kubernetes namespaces	https://github.com/ahmetb/kubectx
get-all	Like `kubectl get all` but _really_ everything	https://github.com/corneliusweig/ketall
tail	Stream logs from multiple pods and containers	https://github.com/boz/kail

(copied from https://krew.sigs.k8s.io/docs/user-guide/quickstart/)