Display "flight data" from the corosync "blackbox".
corosync-fplay Print out the logs (including debug logs) that were recorded before the last corosync crash.
Get info to help developers diagnose a crash.
Starting replay: head  tail 
rec= Log Message=Corosync Cluster Engine ('1.2.1'): started and ready to provide service.
rec= Log Message=Delivering MCAST message with seq a to pending delivery queue
rec= Log Message=downlist received left_list: 2
rec= Log Message=chosen downlist from node r(0) ip(192.168.100.11)
Finishing replay: records found