feat: Publish helm chart also as an OCI package to GHCR

.github/workflows/release.yaml

@@ -5,6 +5,10 @@ on:
     branches:
       - main
 
+permissions:
+  contents: write  # for helm/chart-releaser-action to push chart release and create a release
+  packages: write  # to push OCI chart package to GitHub Registry
+
 jobs:
   release:
     runs-on: ubuntu-latest
@@ -24,3 +28,20 @@ jobs:
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
           CR_GENERATE_RELEASE_NOTES: true
+
+      - name: Login to GHCR
+        uses: docker/[email protected]
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push chart to GHCR
+        run: |
+          shopt -s nullglob
+          for pkg in .cr-release-packages/*.tgz; do
+            if [ -z "${pkg:-}" ]; then
+              break
+            fi
+            helm push "${pkg}" oci://ghcr.io/${{ github.repository }}
+          done

README.md

@@ -4,7 +4,7 @@
 
 ## Usage
 
-Add the repo:
+Add the repo (only needed if you want to use the classical approach without using the [OCI registry](https://helm.sh/docs/topics/registries/)):
 
 ```
 helm repo add kubereboot https://kubereboot.github.io/charts

charts/kured/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: "1.15.0"
 description: A Helm chart for kured
 name: kured
-version: 5.4.2
+version: 5.4.3
 home: https://github.com/kubereboot/kured
 maintainers:
   - name: chopf

charts/kured/README.md

@@ -5,6 +5,7 @@ This chart installs the "Kubernetes Reboot Daemon" using the Helm Package Manage
 
 ## Prerequisites
 - Kubernetes 1.9+
+- Helm 3.8.0+ (to pull the chart from the OCI registry)
 
 ## Installing the Chart
 To install the chart with the release name `my-release`:
@@ -13,6 +14,12 @@ $ helm repo add kubereboot https://kubereboot.github.io/charts
 $ helm install my-release kubereboot/kured
 ```
 
+You can also pull the helm chart from the OCI registry `ghcr.io`:
+
+```bash
+$ helm install my-release oci://ghcr.io/kubereboot/charts/kured
+```
+
 ## Uninstalling the Chart
 To uninstall/delete the `my-release` deployment:
 ```bash