6.3. Upgrading the client on Red Hat Openshift Container Platform Nodes

Execute the following commands on each of the nodes:

To drain the pod, execute the following command on the master node (or any node with cluster-admin access):
```
# oc adm drain <node_name> --ignore-daemonsets
```
To check if all the pods are drained, execute the following command on the master node (or any node with cluster-admin access) :
```
# oc get pods --all-namespaces --field-selector=spec.nodeName=<node_name>
```
Execute the command on the node to upgrade the client on the node to glusterfs-fuse-3.12.2-32.el7.x86_64 version:
```
# yum install glusterfs-client
```
To enable node for pod scheduling execute the following command on the master node (or any node with cluster-admin access):
```
# oc adm manage-node --schedulable=true <node_name>
```

Create and add the following content to the multipath.conf file:

Note

Make sure that the changes to multipath.conf and reloading of multipathd are done only after all the server nodes are upgraded.

# cat >> /etc/multipath.conf <<EOF
# LIO iSCSI
devices {
        device {
                vendor "LIO-ORG"
                user_friendly_names "yes" # names like mpatha
                path_grouping_policy "failover" # one path per group
                hardware_handler "1 alua"
                path_selector "round-robin 0"
                failback immediate
                path_checker "tur"
                prio "alua"
                no_path_retry 120
                rr_weight "uniform"
        }
}
EOF

Execute the following commands to start multipath daemon and [re]load the multipath configuration:
```
# systemctl start multipathd
```
```
# systemctl reload multipathd
```

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6.3. Upgrading the client on Red Hat Openshift Container Platform Nodes

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