Introduction to Helm
- 1. Introduction to Helm Pune Kubernetes Meetup #4 22nd April 2017
- 2. About Me
- 3. What is Helm? Helm is a package manager for Kubernetes. It allows easy installation and management of Kubernetes applications.
- 5. Introduction via Loose Equivalences Equivalences drawn here are mainly to help in getting started There are major differences as we dig deeper
- 6. Helm ≈ Docker client ● Runs on client machine ● Talks to Kubernetes cluster configured in ${HOME}/.kube/config ● Single binary download available for Linux and OSX
- 7. Tiller ≈ Docker Daemon ● Server-side component ● Runs as a pod on Kubernetes cluster ● Does the actual work of installing and managing Kubernetes applications as well as maintaining release history
- 8. Charts ≈ Puppet Modules ● Charts are Helm packages stored as text files. A chart contains minimum of 2 things : ○ A Chart.yaml that describes the package ○ One or more template files which define Kubernetes manifests ● Charts can be referred to from URL’s, tgz archives and directories ● Charts and their values can be customized as needed ● Charts can depend on other charts
- 9. Release ≈ Container ● Release is the installed instance of a Chart ● Has unique name in a cluster ● Allows install, upgrade, rollback and delete operations.
- 10. Demo