Add OCI registry support for Helm charts (#5837)

* Initial plan

* Add OCI registry support for Helm charts to ghcr.io

Co-authored-by: oilbeater <[email protected]>

* Update Helm chart documentation with OCI registry usage

Co-authored-by: oilbeater <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: oilbeater <[email protected]>
(cherry picked from commit cf2bd00)

Author: Copilot

.github/workflows/release-chart.yaml

@@ -10,6 +10,7 @@ jobs:
   release:
     permissions:
       contents: write # to push chart release and create a release (helm/chart-releaser-action)
+      packages: write # to push chart to GitHub Container Registry (ghcr.io)
 
     runs-on: ubuntu-latest
     steps:
@@ -30,3 +31,25 @@ jobs:
           packages_with_index: true
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Login to GitHub Container Registry
+        run: |
+          echo "${{ secrets.GITHUB_TOKEN }}" | helm registry login ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Push charts to OCI registry
+        run: |
+          for chart in charts/*/; do
+            if [ -f "${chart}Chart.yaml" ]; then
+              chart_name=$(basename "$chart")
+              chart_version=$(grep '^version:' "${chart}Chart.yaml" | awk '{print $2}' | tr -d 'v')
+              
+              echo "Packaging and pushing ${chart_name} version ${chart_version}..."
+              helm package "$chart" -d /tmp/charts
+              helm push "/tmp/charts/${chart_name}-${chart_version}.tgz" oci://ghcr.io/${{ github.repository_owner }}/charts
+            fi
+          done
+
+      - name: Logout from GitHub Container Registry
+        if: always()
+        run: |
+          helm registry logout ghcr.io

charts/kube-ovn-v2/README.md

@@ -5,6 +5,22 @@
 This is the v2 of the Helm Chart, replacing the first version in the long term.
 Make sure to adjust your old values with the new ones and pre-generate your templates with a dry-run to ensure no breaking change occurs.
 
+## Installing the Chart
+
+### From OCI Registry
+
+The Helm chart is available from GitHub Container Registry:
+
+```bash
+helm install kube-ovn oci://ghcr.io/kubeovn/charts/kube-ovn-v2 --version 1.15.0
+```
+
+### From Source
+
+```bash
+helm install kube-ovn ./charts/kube-ovn-v2
+```
+
 ## How to install Kube-OVN on Talos Linux
 
 To install Kube-OVN on Talos Linux, declare the **OpenvSwitch** module in the `machine` config of your Talos install:

charts/kube-ovn-v2/README.md.gotmpl

@@ -5,6 +5,22 @@
 This is the v2 of the Helm Chart, replacing the first version in the long term.
 Make sure to adjust your old values with the new ones and pre-generate your templates with a dry-run to ensure no breaking change occurs.
 
+## Installing the Chart
+
+### From OCI Registry
+
+The Helm chart is available from GitHub Container Registry:
+
+```bash
+helm install kube-ovn oci://ghcr.io/kubeovn/charts/kube-ovn-v2 --version {{ template "chart.version" . }}
+```
+
+### From Source
+
+```bash
+helm install kube-ovn ./charts/kube-ovn-v2
+```
+
 ## How to install Kube-OVN on Talos Linux
 
 To install Kube-OVN on Talos Linux, declare the **OpenvSwitch** module in the `machine` config of your Talos install:

charts/kube-ovn/README.md

@@ -2,6 +2,18 @@
 
 Currently supported version: 1.9
 
+## Installing the Chart
+
+### From OCI Registry
+
+The Helm chart is available from GitHub Container Registry:
+
+```bash
+helm install kube-ovn oci://ghcr.io/kubeovn/charts/kube-ovn --version v1.15.0
+```
+
+### From Source
+
 Installation :
 
 ```bash