feat(system-upgrade): allow upgrading Rocky Linux

system/system-upgrade/kustomization.yaml

@@ -4,3 +4,4 @@ kind: Kustomization
 resources:
   - https://github.com/rancher/system-upgrade-controller/releases/download/v0.8.1/system-upgrade-controller.yaml
   - k3s
+  - rocky-linux

system/system-upgrade/rocky-linux/kustomization.yaml

@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - upgrade.yaml
+
+commonAnnotations:
+  # TODO https://github.com/rancher/system-upgrade-controller/issues/172
+  argocd.argoproj.io/sync-options: SkipDryRunOnMissingResource=true

system/system-upgrade/rocky-linux/upgrade.yaml

@@ -0,0 +1,38 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: rocky-upgrade
+  namespace: system-upgrade
+type: Opaque
+stringData:
+  upgrade.sh: |
+    #!/bin/sh
+    set -e
+    dnf upgrade -y
+    command -v needs-restarting || dnf install -y dnf-utils
+    needs-restarting --reboothint || reboot
+---
+apiVersion: upgrade.cattle.io/v1
+kind: Plan
+metadata:
+  name: rocky-upgrade
+  namespace: system-upgrade
+spec:
+  serviceAccountName: system-upgrade
+  secrets:
+    - name: rocky
+      path: /host/run/system-upgrade/secrets/rocky
+  upgrade:
+    image: rockylinux
+    command:
+      - chroot
+      - /host
+    args:
+      - sh
+      - /run/system-upgrade/secrets/rocky/upgrade.sh
+  concurrency: 1
+  cordon: true
+  drain:
+    force: true
+    skipWaitForDeleteTimeout: 300  # Honor PodDisruptionBudgets
+  version: 20220123  # TODO dummy value