Enable the Managed Upgrade Operator in ARO and schedule Upgrades

Paul Czarkowski

04/12/2022

Prerequisites

• an Azure Red Hat OpenShift cluster

Get Started

1. Run this oc command to enable the Managed Upgrade Operator (MUO)

   oc patch cluster.aro.openshift.io cluster --patch \
    '{"spec":{"operatorflags":{"rh.srep.muo.enabled": "true","rh.srep.muo.managed": "true","rh.srep.muo.deploy.pullspec":"arosvc.azurecr.io/managed-upgrade-operator@sha256:f57615aa690580a12c1e5031ad7ea674ce249c3d0f54e6dc4d070e42a9c9a274"}}}' \
    --type=merge
   

2. Wait a few moments to ensure the Management Upgrade Operator is ready

   oc -n openshift-managed-upgrade-operator \
     get deployment managed-upgrade-operator
   

   NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
   managed-upgrade-operator   1/1     1            1           2m2s
   

3. Configure the Managed Upgrade Operator

   cat << EOF | oc apply -f -
   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: managed-upgrade-operator-config
     namespace:  openshift-managed-upgrade-operator
   data:
     config.yaml: |
       configManager:
         source: LOCAL
         localConfigName: managed-upgrade-config
         watchInterval: 1
       maintenance:
         controlPlaneTime: 90
         ignoredAlerts:
           controlPlaneCriticals:
           - ClusterOperatorDown
           - ClusterOperatorDegraded
       upgradeWindow:
         delayTrigger: 30
         timeOut: 120
       nodeDrain:
         timeOut: 45
         expectedNodeDrainTime: 8
       scale:
         timeOut: 30
       healthCheck:
         ignoredCriticals:
         - PrometheusRuleFailures
         - CannotRetrieveUpdates
         - FluentdNodeDown
         ignoredNamespaces:
         - openshift-logging
         - openshift-redhat-marketplace
         - openshift-operators
         - openshift-user-workload-monitoring
         - openshift-pipelines
   EOF
   

4. Restart the Managed Upgrade Operator

   oc -n openshift-managed-upgrade-operator \
     scale deployment managed-upgrade-operator --replicas=0
   oc -n openshift-managed-upgrade-operator \
     scale deployment managed-upgrade-operator --replicas=1
   

5. Look for available Upgrades

   If there output is nil there are no available upgrades and you cannot continue.

   oc get clusterversion version -o jsonpath='{.status.availableUpdates}'
   

6. Schedule an Upgrade

   Set the Channel and Version to the desired values from the above list of available upgrades.

   cat << EOF | oc apply -f -
   apiVersion: upgrade.managed.openshift.io/v1alpha1
   kind: UpgradeConfig
   metadata:
     name: managed-upgrade-config
     namespace: openshift-managed-upgrade-operator
   spec:
     type: "ARO"
     upgradeAt: $(date -u --iso-8601=seconds --date "+5 minutes")
     PDBForceDrainTimeout: 60
     capacityReservation: false
     desired:
       channel: "stable-4.9"
       version: "4.9.27"
   EOF
   

7. Check the status of the scheduled upgrade

   oc -n openshift-managed-upgrade-operator get \
     upgradeconfigs.upgrade.managed.openshift.io \
     managed-upgrade-config -o jsonpath='{.status}' | jq
   

   The output of this command should show upgrades in progress

   {
   "history": [
     {
       "conditions": [
         {
           "lastProbeTime": "2022-04-12T14:42:02Z",
           "lastTransitionTime": "2022-04-12T14:16:44Z",
           "message": "ControlPlaneUpgraded still in progress",
           "reason": "ControlPlaneUpgraded not done",
           "startTime": "2022-04-12T14:16:44Z",
           "status": "False",
           "type": "ControlPlaneUpgraded"
         },
   

8. You can verify the upgrade has completed successfully via the following

   oc get clusterversion version
   

   NAME      VERSION   AVAILABLE   PROGRESSING   SINCE   STATUS
   version   4.9.27    True        False         161m    Cluster version is 4.9.27