QB-BLACKBOX(8) Maintenance Commands and Procedures QB-BLACKBOX(8)

NAME

qb-blackbox - Display "flight data" from the "blackbox".

SYNOPSIS

qb-blackbox [blackbox-file...]

DESCRIPTION

qb-blackbox prints out the logs (including debug logs) that were
recorded using libqb's blackbox mechanism.

Portability notes

Due to variations amongst platforms, some of which directly impact
the libqb's blackbox format handling (e.g. page size), there's
currently only the commitment that qb-blackbox shall decode the
blackbox files recorded at the same platform (plus the same page
size) while using libqb compiled with the same relevant compile-time
options (e.g. USE_CACHE_LINE_ALIGNMENT) as linked to this decoder.
Otherwise, your mileage may vary.

EXAMPLES

Get info to help developers diagnose a crash.
$ qb-blackbox /var/lib/corosync/fdata
Dumping the contents of /var/lib/corosync/fdata
Mar 23 20:58:57 message_handler_orf_token():3677 install seq 0
aru 0 high seq received 0
Mar 23 20:58:57 message_handler_orf_token():3696 retrans flag
count 4 token aru 0 install seq 0 aru 0 0
Mar 23 20:58:57 old_ring_state_reset():1487 Resetting old ring
state
Mar 23 20:58:57
deliver_messages_from_recovery_to_regular():1693 recovery to
regular 1-0
Mar 23 20:58:57 memb_state_operational_enter():1779 Delivering
to app 1 to 0
Mar 23 20:58:57 sync_abort():594 ENTERING sync_abort()
Mar 23 20:58:57 sync_save_transitional():586 ENTERING
sync_save_transitional()
Mar 23 20:58:57 member_object_joined():301 Member joined: r(0)
ip(192.168.122.1)
Mar 23 20:58:57 sync_abort():594 ENTERING sync_abort()

SEE ALSO

qblog.h(3)

AUTHOR

Angus Salkeld

2017-07-27 QB-BLACKBOX(8)