Kubernetes & OpenShift on Power

 View Only

Kubernetes Krew Plugin Support for Power

By PAUL BASTIDE posted Wed July 19, 2023 01:51 PM


Hey everyone,

Krew, the kubectl plugin package manager, is now available on Power. The release v0.4.4 has a ppc64le download. You can download and start taking advantage of the krew plugin list. ppc64le download. It also works with the OpenShift CLI.

The Krew website has a list of plugins - https://krew.sigs.k8s.io/plugins/. Not all of the plugins support ppc64le, however may are cross-arch scripts and are cross compiled such as view-utilization.

To take advantage of Krew with OpenShift, here are a few steps

  1. Download the krew-linux plugin

# curl -L -O https://github.com/kubernetes-sigs/krew/releases/download/v0.4.4/krew-linux_ppc64le.tar.gz % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0 100 3977k 100 3977k 0 0 6333k 0 --:--:-- --:--:-- --:--:-- 30.5M
  1. Extract the krew plugin

tar xvf krew-linux_ppc64le.tar.gz ./LICENSE ./krew-linux_ppc64le
  1. Move to the /usr/bin so it's picked up by oc.

mv krew-linux_ppc64le /usr/bin/kubectl-krew
  1. Update the krew plugin

# kubectl krew update WARNING: To be able to run kubectl plugins, you need to add the following to your ~/.bash_profile or ~/.bashrc: export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH" and restart your shell. Adding "default" plugin index from https://github.com/kubernetes-sigs/krew-index.git. Updated the local copy of plugin index.
  1. Update your shell:

# echo 'export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"' >> ~/.bashrc
  1. Restart your session (exit and come back to the shell so the variables are loaded)

  2. Try oc krew list

# oc krew list PLUGIN VERSION
  1. List all the plugins that support ppc64le.

# oc krew search | grep -v 'unavailable on linux/ppc64le' NAME DESCRIPTION INSTALLED allctx Run commands on contexts in your kubeconfig no assert Assert Kubernetes resources no bulk-action Do bulk actions on Kubernetes resources. no ... tmux-exec An exec multiplexer using Tmux no view-utilization Shows cluster cpu and memory utilization no
  1. Install a plugin

# oc krew install view-utilization Updated the local copy of plugin index. Installing plugin: view-utilization Installed plugin: view-utilization \ | Use this plugin: | kubectl view-utilization | Documentation: | https://github.com/etopeter/kubectl-view-utilization | Caveats: | \ | | This plugin needs the following programs: | | * bash | | * awk (gawk,mawk,awk) | / / WARNING: You installed plugin "view-utilization" from the krew-index plugin repository. These plugins are not audited for security by the Krew maintainers. Run them at your own risk.
  1. Use the plugin.

# oc view-utilization Resource Requests %Requests Limits %Limits Allocatable Schedulable Free CPU 7521 16 2400 5 45000 37479 37479 Memory 33477885952 36 3774873600 4 92931489792 59453603840 59453603840

Tip: There are many more plugins with ppc64le support and do not have the krew manifest updated.

Thanks to PR 755 we have support for ppc64le.