The crash module collects information about daemon crashdumps and stores it in the Ceph cluster for later analysis.
Daemon crashdumps are dumped in /var/lib/ceph/crash by default; this can be configured with the option ‘crash dir’. Crash directories are named by time and date and a randomly-generated UUID, and contain a metadata file ‘meta’ and a recent log file, with a “crash_id” that is the same. This module allows the metadata about those dumps to be persisted in the monitors’ storage.
The crash module is enabled with:
ceph mgr module enable crash
ceph crash post -i <metafile>
Save a crash dump. The metadata file is a JSON blob stored in the crash
meta. As usual, the ceph command can be invoked with
and will read from stdin.
ceph crash rm <crashid>
Remove a specific crash dump.
ceph crash ls
List the timestamp/uuid crashids for all new and archived crash info.
ceph crash ls-new
List the timestamp/uuid crashids for all newcrash info.
ceph crash stat
Show a summary of saved crash info grouped by age.
ceph crash info <crashid>
Show all details of a saved crash.
ceph crash prune <keep>
Remove saved crashes older than ‘keep’ days. <keep> must be an integer.
ceph crash archive <crashid>
Archive a crash report so that it is no longer considered for the
RECENT_CRASH health check and does not appear in the
crash ls-new output (it will still appear in the
crash ls output).
ceph crash archive-all
Archive all new crash reports.
mgr/crash/warn_recent_interval[default: 2 weeks] controls what constitutes “recent” for the purposes of raising the
mgr/crash/retain_interval[default: 1 year] controls how long crash reports are retained by the cluster before they are automatically purged.