11.2. Resolving an OpenShift Serverless Operator upgrade failure

Procedure

1. Identify the version of OpenShift Serverless Operator that was installed originally by searching in the OpenShift Serverless Release Notes.

   For example, the error message during attempted upgrade might contain the following string:

   The installed KnativeServing version is v1.5.0.

   In this example, the KnativeServing MAJOR.MINOR version is 1.5, which is covered in the release notes for OpenShift Serverless 1.26: OpenShift Serverless now uses Knative Serving 1.5.

2. Uninstall OpenShift Serverless Operator and all of its install plans.

3. Manually install the version of OpenShift Serverless Operator that you discovered in the first step. To install, first create a serverless-subscription.yaml file as shown in the following example:

   apiVersion: operators.coreos.com/v1alpha1
   kind: Subscription
   metadata:
     name: serverless-operator
     namespace: openshift-serverless
   spec:
     channel: stable
     name: serverless-operator
     source: redhat-operators
     sourceNamespace: openshift-marketplace
     installPlanApproval: Manual
     startingCSV: serverless-operator.v1.26.0

4. Then, install the subscription by running the following command:

   $ oc apply -f serverless-subscription.yaml

5. Upgrade by manually approving the upgrade install plans as they appear.