dlm_tool - a utility for the dlm and dlm_controld daemon
dlm_tool [COMMAND] [OPTIONS] [
name ]
ls
Display dlm_controld internal lockspace state.
status
Dump dlm_controld daemon state.
dump
Dump dlm_controld debug buffer.
dump_config
Dump dlm_controld config settings.
reload_config
Reload dlm_controld config settings from dlm.conf.
set_config setting=value
Set dlm_controld config settings in the currently running daemon.
fence_ack nodeid
Cancel a waiting fencing operation and consider it successful.
log_plock
Dump dlm_controld plock debug buffer.
plocks lockspace_name
Dump posix locks from dlm_controld for the lockspace.
join lockspace_name
Join a lockspace.
leave lockspace_name
Leave a lockspace.
joinleave lockspace_name
Join then immediately leave a lockspace (for testing only.)
lockdebug lockspace_name
Complete display of locks from the lockspace.
lockdump lockspace_name
Minimal display of locks from the lockspace (deprecated).
run command
Run command and check for result (for lvmlockd only.)
run_start command
Run command and don't check for result.
run_check uuid
Check status of a command that was run.
run_cancel uuid
Cancel a command that was run and is not yet done.
run_list
Dump a list of running commands.
-n Show all node information from dlm_tool ls.
-d 0|1 Resource directory off/on in join, default 0
-e 0|1 Exclusive create off/on in join, default 0
-f 0|1 FS (filesystem) flag off/on in join, default 0
-i sec Seconds to wait in run_check.
-m mode Permission mode for lockspace device (octal), default 0600
-s Summary following lockdebug output (experiemental)
-v Verbose lockdebug or status output
-w Wide lockdebug output
-M Include MSTCPY locks in lockdump output
-h Print help, then exit
-V Print program version information, then exit
See dlm_tool status for information about waiting fencing operations for
specific nodeid's.
dlm_tool set_config can change certain config settings in the currently running
dlm_controld. Supported options:
daemon_debug
log_debug
debug_logfile
plock_debug
plock_rate_limit
drop_resources_time
drop_resources_count
drop_resources_age
post_join_delay
enable_quorum_fencing
enable_quorum_lockspace
repeat_failed_fencing
Special cases to revert a previous set_config and restore the previous value
(from default or dlm.conf):
dlm_tool set_config setting=
restore
restores a single setting.
dlm_tool set_config restore_all
restores all settings.
A config setting may have been set from: the default, the dlm_controld command
line, dlm.conf at startup, dlm.conf from reload_config, dlm_tool set_config.
The dump_config output indicates how values were set:
- setting=value
- default value.
- setting=value (cli option)
- Set from a dlm_controld command line option.
- setting=value (dlm.conf)
- Set from dlm.conf (at startup or reload.)
- setting=value (set_config)
- Set from dlm_tool set_config.
$ dlm_tool dump_config | head -n 5
daemon_debug=1 (set_config)
foreground=0
log_debug=1 (dlm.conf)
protocol=detect
In this case, daemon_debug is set by set_config, log_debug is set from dlm.conf,
foreground and protocol are using default values.
$ dlm_tool dump_config | grep log_debug
log_debug=1 (dlm.conf)
$ dlm_tool set_config "log_debug=0"
set_config done
$ dlm_tool dump_config | grep log_debug
log_debug=0 (set_config)
$ dlm_tool set_config "log_debug=restore"
set_config done
$ dlm_tool dump_config | grep log_debug
log_debug=1 (dlm.conf)
log_debug is set by dlm.conf (value is 1), then run set_config to change to 0,
then use restore to restore to dlm.conf setting.
$ dlm_tool dump_config | grep _debug
daemon_debug=0
log_debug=1 (dlm.conf)
plock_debug=0
$ dlm_tool set_config "daemon_debug=1 log_debug=1 plock_debug=1"
set_config done
$ dlm_tool dump_config | grep _debug
daemon_debug=1 (set_config)
log_debug=1 (set_config)
plock_debug=1 (set_config)
$ dlm_tool set_config "restore_all"
set_config done
$ dlm_tool dump_config | grep _debug
daemon_debug=0
log_debug=1 (dlm.conf)
plock_debug=0
dlm_controld(8),
dlm.conf(5)