Log Messages from Stack Nodes
Each node can generate log messages through the usual logging mechanism.
On backup and standby nodes, a log target and related filter is automatically installed. The log target is the master node. The filter allows all messages that have a log level of warning, error, or critical to be saved in the log file of the master node.
If the master node changes, the log target is updated on all the remaining nodes. You can also log in to any node in the active topology and see the complete log of the node.