Configuring CSI driver tolerations for ODF 4.20 or later

Configure CSI driver tolerations for ODF 4.20 or later in Automation Suite on OpenShift to schedule Ceph CSI nodeplugins correctly.

Description

OpenShift Data Foundation (ODF) 4.20 uses rook 1.18, which factors out Ceph CSI drivers into a separate operator. As a result, the previous method of passing tolerations through the CSI_PLUGIN_TOLERATIONS configmap no longer works. To ensure that Ceph CSI nodeplugins are scheduled on the correct nodes, you must explicitly add tolerations to the Ceph CSI nodeplugins.

Solution

After the storagecluster has been successfully deployed, take the following steps:

1. Save the following configuration to a YAML file:

   ---
   apiVersion: csi.ceph.io/v1
   kind: Driver
   metadata:
     name: openshift-storage.cephfs.csi.ceph.com
     namespace: openshift-storage
   spec:
     nodePlugin:
       tolerations:
       - effect: NoSchedule
         key: node.ocs.openshift.io/storage
         operator: Equal
         value: "true"
       - effect: NoSchedule
         key: serverless.robot
         operator: Equal
         value: "present"
       - effect: NoSchedule
         key: node-role.kubernetes.io/control-plane
         operator: Exists
       - effect: NoSchedule
         key: uipath
         operator: Exists
   ---
   apiVersion: csi.ceph.io/v1
   kind: Driver
   metadata:
     name: openshift-storage.rbd.csi.ceph.com
     namespace: openshift-storage
   spec:
     nodePlugin:
       tolerations:
       - effect: NoSchedule
         key: node.ocs.openshift.io/storage
         operator: Equal
         value: "true"
       - effect: NoSchedule
         key: serverless.robot
         operator: Equal
         value: "present"
       - effect: NoSchedule
         key: node-role.kubernetes.io/control-plane
         operator: Exists
       - effect: NoSchedule
         key: uipath
         operator: Exists
   

2. Apply the configuration by running the following command:

   oc apply -f <filename>.yaml