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demo-helm-library

Demo helm library for templates

What is library chart

official docs

⚠️Warning: Please read this first

Here is a simple example of a library chart based on the official Helm docs. In my opinion, using functions like demo-library.util.merge may be risky and unnecessary in the long run. Proceed with caution.

For my production solution, I will develop a distinct version of the library, relying on common sense and straightforward templates, avoiding Go template merging or similar techniques.

OCI registry

You need create your oci registry, for example, use quay.io docs

Set your quay.io username and password:

  1. Go to https://quay.io/repository
  2. Login
  3. In the right top corner click at your name Account Settings
  4. Click on link: CLI Password: Generate Encrypted Password
  5. Input your password
  6. You get 2 values Username & Encrypted Password
  7. Save them and add to your shell envs:
export QUAY_USERNAME=''
export QUAY_PASSWD_ENCRYPTED=''
  1. Now you can login in your registry
helm registry login -u $QUAY_USERNAME -p $QUAY_PASSWD_ENCRYPTED quay.io

Package helm library chart

Assuming your chart is in the current directory. This creates an archive with versions specified in Chart.yaml

helm package .

example:

$ helm package .
Successfully packaged chart and saved it to: /path/to/demo-helm-library/demo-library-0.1.2.tgz

# Chart.yaml inside the package has been created with the version from the current Chart.yaml:
$ tar -qxvf demo-library-0.1.2.tgz && cat demo-library/Chart.yaml | grep version
version: 0.1.2

Also, we can set the chart version manually. This may be useful if you will test some features locally.

helm package -u --version 0.1.2 .

example:

$ helm package -u --version 0.1.2 .
Successfully packaged chart and saved it to: /path/to/demo-helm-library/demo-library-0.1.2.tgz

# Chart.yaml inside the package has been created with the bumped version:
$ tar -qxvf demo-library-0.1.2.tgz && cat demo-library/Chart.yaml | grep version
version: 0.1.2

Push chart to oci repo

helm push demo-library-0.1.2.tgz oci://quay.io/$QUAY_USERNAME/test-helm

example:

$ helm push demo-library-0.1.2.tgz oci://quay.io/$QUAY_USERNAME/test-helm
Pushed: quay.io/$QUAY_USERNAME/test-helm/demo-library:0.1.2
Digest: sha256:ae96270ed2cc592b52550a289dd82650ee6b39428a4befde721d58c20531aa5c

Additional info

This helm library is used in my demo chart in another repository.This helm library used in my demo chart in other repo

If you are creating a CI/CD pipeline or doing manual builds, don't forget to delete archives after a successful push in the registry.