Helm is an open source project that enables developers to create packages of containerized apps to make installation much simpler. Up until now, it was a sub-project of Kubernetes, the popular container orchestration tool, but as of today it is a stand-alone project.
Both Kubernetes and Helm are projects managed by the Cloud Native Computing Foundation (CNCF). The CNCF’s Technical Oversight Committee approved the project earlier this week. Dan Kohn, executive director at the CNCF says the two projects are closely aligned so it made sense for Helm to be a sub-project up until now.
“What’s nice about Helm is that it’s just an application on top of Kubernetes. Kubernetes is an API and Helm accesses that API. If you want you to install this [package], you access the Kubernetes API, and it pulls this many containers and pods and [it handles] all of the steps involved to do that,” Kohn explained.
This ability to package up a set of requirements allows you to repeat the installation process in a consistent way. “Helm addresses a common user need of deploying applications to Kubernetes by making their configurations reusable,” Brian Grant, principal engineer at Google and Kubernetes (and a member of the TOC) explained in a statement.
Packages are known as “charts,” which consist one or more containers. Kohn says for example, you might want to deploy a chart that includes WordPress and MariaDB in a single container. By creating a chart, it defines the installation process and which pieces need to go in which order to install correctly across a cluster.
Kohn said they decided to pull it out as a separate program because it doesn’t always follow the Kubernetes release schedule, and as such they wanted to make it stand-alone so it wouldn’t necessarily have to be linked to every Kubernetes release.
It also allows developers to benefit from the community, who could build Charts for common installation scenarios. “By joining CNCF, we’ll benefit from the input and participation of the community, and conversely Kubernetes will benefit when a community of developers provides a vast repository of ready-made charts for running workloads on Kubernetes,” Matt Butcher, co-creator of Helm and principal engineer at Microsoft said in a statement.
Besides Microsoft and Google, other project sponsors include Codefresh, Bitnami, Ticketmaster and Codecentric. The project website states there are currently 250 developers contributing to this project. By becoming part of CNCF that will very likely increase soon.