helm-multiarch

Deploy a multi-arch image with Helm

While Porter bundles can only run on amd64 hosts, you can deploy mult-arch images to other platforms, such as an ARM64 environment. This example demonstrates how to deploy a helm chart that uses a multi-arch image to an ARM64 kubernetes cluster.

1. Create a file named "mycluster.yaml" with the following contents. Edit the path to the kubeconfig file to the location where your kubeconfig file.

   schemaType: CredentialSet
   schemaVersion: 1.0.1
   name: mycluster
   credentials:
   - name: kubeconfig
     source:
       path: $HOME/.kind/config # TODO: Edit this path
   

2. Apply the credential set

   porter credentials apply mycluster.yaml
   

3. Install the bundle

   porter install -r ghcr.io/getporter/examples/helm-multiarch:v0.1.0 -c mycluster
   

Now that the bundle is installed successfully, let's verify that the deployed image was ARM64.

1. Ensure that your KUBECONFIG environment variable is pointing to the cluster to which you just deployed.
2. Get the image that was deployed and save that value to an environment variable

   IMG=`k get pods -o yaml -l app.kubernetes.io/instance=porter-helm-nginx -o=jsonpath='{.items[0].status.containerStatuses[0].imageID}'`
   

3. Pull the deployed image so that you can inspect it

   docker pull $IMG
   

4. Inspect it to see the architecture of the image

   $ docker image inspect $IMG -f "{{.Architecture}}"
   arm64
   

As you can see, while Porter bundles can't run directly on a ARM64 host, they can deploy to ARM64 environments using multi-arch images! 🎉