Documentation/ndctl/ndctl-monitor.txt

// SPDX-License-Identifier: GPL-2.0

include::attrs.adoc[]

ndctl-monitor(1)
================

NAME
----
ndctl-monitor - Monitor the smart events of nvdimm objects

SYNOPSIS
--------
[verse]
'ndctl monitor' [<options>]

DESCRIPTION
-----------
Ndctl monitor is used for monitoring the smart events of nvdimm
objects and dumping the json format notifications to syslog, standard
output or a logfile.

The objects to monitor and smart events to notify can be selected by
setting options and/or the configuration file at
{ndctl_monitorconfdir}/{ndctl_monitorconf}

Both, the values in configuration file and in options will work. If
there is a conflict, the values in options will override the values in
the configuration file. Any updated values in the configuration file will
take effect only after the monitor process is restarted.

EXAMPLES
--------

Run a monitor as a daemon to monitor DIMMs on bus "nfit_test.1"
[verse]
ndctl monitor --bus=nfit_test.1 --daemon

Run a monitor as a one-shot command and output the notifications to
/var/log/ndctl.log
[verse]
ndctl monitor --log=/var/log/ndctl.log

Run a monitor daemon as a system service
[verse]
systemctl start ndctl-monitor.service

OPTIONS
-------
-b::
--bus=::
	Enforce that the operation only be carried on devices that are
	attached to the given bus. Where 'bus' can be a provider name
	or a bus id number.

-d::
--dimm=::
	A 'nmemX' device name, or dimm id number. Select the devices to
	monitor reference the given dimm.

-r::
--region=::
	A 'regionX' device name, or a region id number. The keyword 'all'
	can be specified to carry out the operation on every region in
	the system, optionally filtered by bus id (see --bus= option).

-n::
--namespace=::
	A 'namespaceX.Y' device name, or namespace region plus id tuple
	'X.Y'.

-l::
--log=::
	Send log messages to the specified destination.
	- "<file>":
	  Send log messages to specified <file>. When fopen() is not able
	  to open <file>, log messages will be forwarded to syslog.
	- "syslog":
	  Send messages to syslog.
	- "standard":
	  Send messages to standard output.

The default log destination is 'syslog' if "--daemon" is specified,
otherwise 'standard'. Note that standard and relative path for <file>
will not work if "--daemon" is specified.

-c::
--config-file=::
	Provide the config file to use. This overrides the default config
	typically found in {ndctl_monitorconfdir}

--daemon::
	Run a monitor as a daemon.

-D::
--dimm-event=::
	Name of an smart health event from the following:
	- "dimm-spares-remaining": Spare Blocks Remaining value has gone
	   below the pre-programmed threshold.
	- "dimm-media-temperature": NVDIMM Media temperature value has
	   gone above the pre-programmed threshold.
	- "dimm-controller-temperature": NVDIMM Controller temperature
	   value has gone above the pre-programmed threshold.
	- "dimm-health-state": NVDIMM Normal Health Status has changed
	- "dimm-unclean-shutdown": NVDIMM Last Shutdown Status was a
	   unclean shutdown.

The monitor will attempt to enable the alarm control bits for all
specified events.

-u::
--human::
	Output monitor notification as human friendly json format instead
	of the default machine friendly json format.

-v::
--verbose::
	Emit extra debug messages to log.

COPYRIGHT
---------
Copyright (c) 2018, FUJITSU LIMITED. License GPLv2: GNU GPL version 2
<http://gnu.org/licenses/gpl.html>. This is free software: you are
free to change and redistribute it. There is NO WARRANTY, to the
extent permitted by law.

SEE ALSO
--------
linkndctl:ndctl-list[1], linkndctl:ndctl-inject-smart[1]