Troubleshooting with node maintenance mode

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Maintenance of the cluster, nodes, and disks are not needed under normal operation. If maintenance is necessary, you can use the clctrl -stop command to place a node or set of nodes in maintenance mode.

The clctrl -stop command quiesces cluster services on one or more nodes. You may make cluster configuration changes as long as one node in the cluster is in normal operation. If all nodes in the cluster are stopped, you cannot make cluster configuration changes.

Nodes that have been stopped do not participate in cluster configuration or communications and are seen by the other nodes as down. The stopped state is persistent. Nodes that have been stopped must be explicitly started via the clctrl -start command before they can resume cluster participation.

To set a node in maintenance mode, run the following command:

clctrl -stop -n mycluster -m nodeA

To set all nodes in maintenance mode, run the following command:

clctrl -stop -n mycluster -a

To set a node to normal operation, run the following command:

clctrl -start -n mycluster -m nodeA

To set all nodes to normal operation, run the following command:

clctrl -start -n mycluster -a