4.4.6. Configuring fencing levels

Pacemaker supports fencing nodes with multiple devices through a feature called fencing topologies. To implement topologies, create the individual devices as you normally would and then define one or more fencing levels in the fencing topology section in the configuration.

Pacemaker processes fencing levels as follows:

Use the following command to add a fencing level to a node. The devices are given as a comma-separated list of stonith ids, which are attempted for the node at that level.

# pcs stonith level add level node devices

The following example configures fence levels so that if the device my_ilo fails and is unable to fence the node, then Pacemaker attempts to use the device my_apc.