Resource Group Failover and Restart Control

The scha_control API function allows resource monitors to request the failover of a resource group to a different node. As one of its sanity checks, scha_control calls MONITOR_CHECK (if defined), which determines if the node on which it is run is reliable enough to master the resource group containing the resource. If MONITOR_CHECK reports back that the node is not reliable, or the method times out, the RGM looks for a different node to honor the scha_control request. If MONITOR_CHECK fails on all nodes, the failover is canceled.