Helm

Helm is a package manager for Kubernetes A helm chart is a peice of software run in a K8s cluter

from https://www.katacoda.com/courses/kubernetes/helm-package-manager

Commands

Install helm curl -LO https://storage.googleapis.com/kubernetes-helm/helm-v2.8.2-linux-amd64.tar.gz tar -xvf helm-v2.8.2-linux-amd64.tar.gz mv linux-amd64/helm /usr/local/bin/

Initialize Helm on the server and client helm init

Update helm charts so that they are up to date helm repo update

Search for available helm charts helm search <name_of_software> example: helm search redis

Inspect a chart helm inspect <name_of_chart_and_release> example: helm inspect stable/redis

Deploy a chart to your cluster helm deploy <name_of_chart_and_release> example: helm deploy stable/redis

Look at what you've deployed with helm helm ls

Trouble Shooting

• There are 2 parts to helm: the client and server. The server is tiller

• If your client and server versions are out of sync, you will get an error when you run helm init

  • The error: when you run a helm command, you will see 'tiller not present in cluster. Have you run helm init?'
  • When you run helm init, you will see: warning: Tiller is already installed in this cluster

• SOLUTION: helm init --upgrade

• A common error: Error: UPGRADE FAILED: "contact-context-develop" has no deployed releases

• It's a bug in helm. The fix: helm delete --purge <releasename>

Use homebrew to switch versions of kubernetes-helm See here: https://github.com/helm/helm/issues/1523#issuecomment-423357734

$ brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/78d64252f30a12b6f4b3ce29686ab5e262eea812/Formula/kubernetes-helm.rb
$ brew switch kubernetes-helm 2.9.1```