Node Administration

Adding and Removing Nodes

Adding and removing nodes is as simple as restarting the wizard and going to the Advanced > Layout tab and editing the current cluster layout.

Deleting Nodes

When you delete a node from the GUI, some nodes (in the most common case just one) will be scheduled for reprovisioning (or rebooting if they are "non-compute" nodes). This means that during the configuration process these nodes will be rebooted and reinstalled automatically. These nodes will be marked as "reprovision" in the layout section of the advanced panel.

Reinstalling Nodes

To issue the reinstall of a compute node, you can use the specific terminal command:

mcb_reinst_node <nodename>

Replace <nodename> with the hostname of the node you want to reinstall. The domain name suffix is not necessary.

This command deletes the master boot record of the primary drive on the compute node, configures the PXE manager to boot the installer on the next reboot, and reboots the machine. Root SSH authentication keys must function for this command to work.

Replacing Nodes

To replace a node, open the Moab Cluster Deployment Wizard and open the layout manager in the Advanced section. On this screen you must replace the MAC address of the old machine with the new one.


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Home Products Services Resources Partners Press News Company	Node Administration Adding and Removing Nodes Adding and removing nodes is as simple as restarting the wizard and going to the Advanced > Layout tab and editing the current cluster layout. Deleting Nodes When you delete a node from the GUI, some nodes (in the most common case just one) will be scheduled for reprovisioning (or rebooting if they are "non-compute" nodes). This means that during the configuration process these nodes will be rebooted and reinstalled automatically. These nodes will be marked as "reprovision" in the layout section of the advanced panel. Reinstalling Nodes To issue the reinstall of a compute node, you can use the specific terminal command: mcb_reinst_node <nodename> Replace <nodename> with the hostname of the node you want to reinstall. The domain name suffix is not necessary. This command deletes the master boot record of the primary drive on the compute node, configures the PXE manager to boot the installer on the next reboot, and reboots the machine. Root SSH authentication keys must function for this command to work. Replacing Nodes To replace a node, open the Moab Cluster Deployment Wizard and open the layout manager in the Advanced section. On this screen you must replace the MAC address of the old machine with the new one.
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