Dell ObjectScale 1.3 Administration Guide

Place a healthy node into permanent maintenance mode (ObjectScale on OpenShift)

Use the manual process to place a healthy node into permanent maintenance mode (PMM). Use this process for ObjectScale instances on a Red Hat OpenShift cluster.

1. Apply a taint to the node to be removed:

   kubectl taint node <NODE_NAME> node.dell.com/drain=drain:NoSchedule

Wait for the PMM service procedure to complete before moving on to the next steps.

2. Collect the UUID for the node to be removed from the cluster:

   kubectl get csibmnodes

3. Remove the node from the OpenShift cluster.

   kubectl delete node <NODE_NAME>

   NOTE:Once you delete the node, it is no longer listed in the kubectl get nodes output.

For healthy node removal initiated by tainting the node, removal of CSI resources happens automatically.

This process includes removal of the following CSI resources, which completes the node removal process:

4. Optional: Monitor the automatic recovery of non-SS pods:
   In order to ensure data protection, certain non-SS pods, such as the bookie, influxdb, and zookeeper pods, require recovery after they are relocated. ObjectScale Operator initiates recovery for these pods automatically once the pods are removed from the PMM node and started on another available node in the cluster.

   kubectl get serviceprocedures -A -o custom-columns=Name:metadata.name,Node:spec.nodeInfo.name,Type:spec.type,Time:metadata.managedFields[0].time,Reason:status.reason,Message:status.message