Add OCI publishing for Helm charts to GHCR

.github/workflows/chart-release.yaml

@@ -5,10 +5,11 @@ jobs:
   ca-release:
     permissions:
       contents: write  # for helm/chart-releaser-action to push chart release and create a release
+      packages: write  # for pushing charts to GHCR
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           fetch-depth: 0
 
@@ -18,9 +19,9 @@ jobs:
           git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
 
       - name: Install Helm
-        uses: azure/setup-helm@v4.2.0
+        uses: azure/setup-helm@v4.3.1
         with:
-          version: v3.4.0
+          version: v3.19.2
 
       - env:
           CR_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -29,13 +30,29 @@ jobs:
         uses: helm/chart-releaser-action@v1.7.0
         with:
           charts_dir: cluster-autoscaler/charts
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push charts to GHCR
+        run: |
+          set -e
+          shopt -s nullglob
+          for pkg in .cr-release-packages/*; do
+            helm push "${pkg}" "oci://ghcr.io/${GITHUB_REPOSITORY_OWNER}/charts"
+          done
   vpa-release:
     permissions:
       contents: write  # for helm/chart-releaser-action to push chart release and create a release
+      packages: write  # for pushing charts to GHCR
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           fetch-depth: 0
 
@@ -45,9 +62,9 @@ jobs:
           git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
 
       - name: Install Helm
-        uses: azure/setup-helm@v4.2.0
+        uses: azure/setup-helm@v4.3.1
         with:
-          version: v3.4.0
+          version: v3.19.2
 
       - env:
           CR_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -56,8 +73,24 @@ jobs:
         uses: helm/chart-releaser-action@v1.7.0
         with:
           charts_dir: vertical-pod-autoscaler/charts
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push charts to GHCR
+        run: |
+          set -e
+          shopt -s nullglob
+          for pkg in .cr-release-packages/*; do
+            helm push "${pkg}" "oci://ghcr.io/${GITHUB_REPOSITORY_OWNER}/charts"
+          done
 name: Release Charts
 on:
   push:
     branches:
       - master
+  workflow_dispatch:

cluster-autoscaler/charts/cluster-autoscaler/README.md

@@ -4,6 +4,8 @@ Scales Kubernetes worker nodes within autoscaling groups.
 
 ## TL;DR
 
+### Using Helm Repository
+
 ```console
 $ helm repo add autoscaler https://kubernetes.github.io/autoscaler
 
@@ -18,6 +20,20 @@ $ helm install my-release autoscaler/cluster-autoscaler \
     --set "autoscalingGroups[0].minSize=1"
 ```
 
+### Using OCI Registry
+
+```console
+# Method 1 - Using Autodiscovery
+$ helm install my-release oci://ghcr.io/kubernetes/charts/cluster-autoscaler \
+    --set 'autoDiscovery.clusterName'=<CLUSTER NAME>
+
+# Method 2 - Specifying groups manually
+$ helm install my-release oci://ghcr.io/kubernetes/charts/cluster-autoscaler \
+    --set "autoscalingGroups[0].name=your-asg-name" \
+    --set "autoscalingGroups[0].maxSize=10" \
+    --set "autoscalingGroups[0].minSize=1"
+```
+
 ## Introduction
 
 This chart bootstraps a cluster-autoscaler deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.

vertical-pod-autoscaler/charts/vertical-pod-autoscaler/README.md

@@ -11,6 +11,21 @@ Automatically adjust resources for your workloads
 ## Introduction
 The Vertical Pod Autoscaler (VPA) automatically adjusts the CPU and memory resource requests of pods to match their actual resource utilization.
 
+## Installation
+
+### Using Helm Repository
+
+```console
+$ helm repo add autoscaler https://kubernetes.github.io/autoscaler
+$ helm install my-release autoscaler/vertical-pod-autoscaler
+```
+
+### Using OCI Registry
+
+```console
+$ helm install my-release oci://ghcr.io/kubernetes/charts/vertical-pod-autoscaler
+```
+
 ## Maintainers
 
 | Name | Email | Url |