Crash Module

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.

Enabling

The crash module is enabled with:

ceph mgr module enable crash

Commands

ceph crash post -i <metafile>

Save a crash dump. The metadata file is a JSON blob stored in the crash dir as meta. As usual, the ceph command can be invoked with -i -, and will read from stdin.

ceph rm <crashid>

Remove a specific crash dump.

ceph crash ls

List the timestamp/uuid crashids for all saved crash 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.