15.2. High availability for Knative deployments

Procedure

1. In the OpenShift Container Platform web console, navigate to OperatorHub Installed Operators.
2. Select the knative-serving namespace.
3. Click Knative Serving in the list of Provided APIs for the OpenShift Serverless Operator to go to the Knative Serving tab.
4. Click knative-serving, then go to the YAML tab in the knative-serving page.

5. Modify the number of replicas in the KnativeServing CR:

   Example YAML

   apiVersion: operator.knative.dev/v1beta1
   kind: KnativeServing
   metadata:
     name: knative-serving
     namespace: knative-serving
   spec:
     high-availability:
       replicas: 3

6. You can also specify the number of replicas for a specific workload.

   注記

   Workload-specific configuration overrides the global setting for Knative Serving.

   Example YAML

   apiVersion: operator.knative.dev/v1beta1
   kind: KnativeServing
   metadata:
     name: knative-serving
     namespace: knative-serving
   spec:
     high-availability:
       replicas: 3
     workloads:
     - name: webhook
       replicas: 4

7. Verify that the high availability limits are respected:

   Example command

   $ oc get hpa -n knative-serving

   Example output

   NAME        REFERENCE              TARGETS   MINPODS   MAXPODS   REPLICAS   AGE
   activator   Deployment/activator   0%/100%   3         22        3          2m24s
   webhook     Deployment/webhook     2%/100%   4         8         4          2m23s