Trigger a non-compute node (NCN) memory dump and send the dump for analysis. This procedure is helpful for debugging NCN crashes.
An NCN has crashed or an administrator has triggered a node crash.
Force a dump on an NCN.
ncn-m001# echo c > /proc/sysrq-trigger
Wait for the node to reboot.
The NCN dump is stored in /var/crash on the local disk after the node is rebooted.
Collect the dump data using the System Diagnostic Utility (SDU).
Refer to the “Run a Triage Collection with SDU” procedure in the SDU product stream documentation for more information about collecting dump data.
The --start_time command option can be customized. For example, -1 day, -2 hours, or a date/time string can be used.
For more information on the SDU command options, use the sdu --help command.
ncn-m001# sdu --scenario triage --start_time DATE_OR_TIME_STRING --end_time DATE_OR_TIME_STRING --plugin ncn.gather.nodes --plugin ncn.gather.kernel.dumps
Refer to the SUSE documentation for more information on memory dumps or crash dumps.