Well, so I tried installing a new ARM-based OpenShift Container Platform cluster on AWS. To prepare, I created an
install-config.yaml file and changed the
controlPlane.architecture and the
compute.architecture field to “
arm64” and then launched the installer. That did not work, it still complains about the architecture:
$ ./openshift-install create cluster --dir=. INFO Credentials loaded from the "default" profile in file "/home/simon/.aws/credentials" INFO Consuming Install Config from target directory INFO Creating infrastructure resources... INFO Waiting up to 20m0s (until 11:07AM) for the Kubernetes API at https://api.skrenger-arm.lab.example.com:6443... INFO Pulling VM console logs INFO Pulling debug logs from the bootstrap machine ERROR Attempted to gather ClusterOperator status after installation failure: listing ClusterOperator objects: Get "https://api.skrenger-arm.lab.example.com:6443/apis/config.openshift.io/v1/clusteroperators": dial tcp 184.108.40.206:6443: connect: connection refused ERROR Bootstrap failed to complete: Get "https://api.skrenger-arm.lab.example.com:6443/version": dial tcp 220.127.116.11:6443: connect: connection refused ERROR Failed waiting for Kubernetes API. This error usually happens when there is a problem on the bootstrap host that prevents creating a temporary control plane. ERROR The bootstrap machine failed to download the release image INFO Pulling quay.io/openshift-release-dev/ocp-release@sha256:9ffb17b909a4fdef5324ba45ec6dd282985dd49d25b933ea401873183ef20bf8... INFO cfce1ab124f59e93a0f67d7e85283d524ddfd73a27d0535319d69d1dce746488 INFO ERROR: release image arch amd64 does not match host arch arm64 INFO Bootstrap gather logs captured here "/home/simon/Downloads/arm/log-bundle-20221124110737.tar.gz"
So the root cause for the issue seems to be that “release image arch amd64 does not match host arch arm64“. Huh, but I changed the architecture in the
It turns out that to install an OpenShift Container Platform ARM cluster, you will need to use the “aarch64” installer and not the “amd64” installer (note the different URLs). The OpenShift Installer contains a hardcoded reference to a certain release image, which in turn is “amd64” or “arm64”. If you use the wrong installer, then you’ll encounter the above error.
You can check which architecture your installer is for using
$ ./openshift-install version ./openshift-install 4.11.16 built from commit e1f339946aa61dbad58e1c3549355ccda67aa8a1 release image quay.io/openshift-release-dev/ocp-release@sha256:e4bb06fe2b63bf2776e529d97202ae7615bdee9811ce10a737052c11d8cd7e83 release architecture arm64
So make sure that you download the correct installer for ARM to install an ARM-based OpenShift cluster. The easiest way is to follow the guidance on console.redhat.com, which will point you to the correct installer.