9.18.13.2. Installing the descheduler

Procedure

1. Log in to the OpenShift Container Platform web console.

2. Create the required namespace for the Kube Descheduler Operator.

   1. Navigate to Administration Namespaces and click Create Namespace.
   2. Enter openshift-kube-descheduler-operator in the Name field, enter openshift.io/cluster-monitoring=true in the Labels field to enable descheduler metrics, and click Create.

3. Install the Kube Descheduler Operator.

   1. Navigate to Ecosystem Software Catalog.
   2. Type Kube Descheduler Operator into the filter box.
   3. Select the Kube Descheduler Operator and click Install.
   4. On the Install Operator page, select A specific namespace on the cluster. Select openshift-kube-descheduler-operator from the drop-down menu.
   5. Adjust the values for the Update Channel and Approval Strategy to the desired values.
   6. Click Install.

4. Create a descheduler instance.

   1. From the Ecosystem Installed Operators page, click the Kube Descheduler Operator.
   2. Select the Kube Descheduler tab and click Create KubeDescheduler.

   3. Edit the settings as necessary.

      1. To evict pods instead of simulating the evictions, change the Mode field to Automatic.

      2. Expand the Profiles section and select LongLifecycle. The AffinityAndTaints profile is enabled by default.

         重要

         The only profile currently available for OpenShift Virtualization is LongLifecycle.

         You can also configure the profiles and settings for the descheduler later using the OpenShift CLI (oc).