Provided by: slurm-client_23.11.4-1.2ubuntu5_amd64 
NAME
strigger - Used to set, get or clear Slurm trigger information.
SYNOPSIS
strigger --set [OPTIONS...]
strigger --get [OPTIONS...]
strigger --clear [OPTIONS...]
DESCRIPTION
strigger is used to set, get or clear Slurm trigger information. Triggers include events such as a node
failing, a job reaching its time limit or a job terminating. These events can cause actions such as the
execution of an arbitrary script. Typical uses include notifying system administrators of node failures
and gracefully terminating a job when its time limit is approaching. A hostlist expression for the
nodelist or job ID is passed as an argument to the program.
Trigger events are not processed instantly, but a check is performed for trigger events on a periodic
basis (currently every 15 seconds). Any trigger events which occur within that interval will be compared
against the trigger programs set at the end of the time interval. The trigger program will be executed
once for any event occurring in that interval. The record of those events (e.g. nodes which went DOWN in
the previous 15 seconds) will then be cleared. The trigger program must set a new trigger before the end
of the next interval to ensure that no trigger events are missed OR the trigger must be created with an
argument of "--flags=PERM". If desired, multiple trigger programs can be set for the same event.
NOTE: This command can only set triggers if run by the user SlurmUser unless SlurmUser is configured as
user root. This is required for the slurmctld daemon to set the appropriate user and group IDs for the
executed program. Also note that the trigger program is executed on the same node that the slurmctld
daemon uses rather than some allocated compute node. To check the value of SlurmUser, run the command:
scontrol show config | grep SlurmUser
ARGUMENTS
-C, --backup_slurmctld_assumed_control
Trigger event when backup slurmctld assumes control.
-B, --backup_slurmctld_failure
Trigger an event when the backup slurmctld fails.
-c, --backup_slurmctld_resumed_operation
Trigger an event when the backup slurmctld resumes operation after failure.
--burst_buffer
Trigger event when burst buffer error occurs.
--clear
Clear or delete a previously defined event trigger. The --id, --jobid or --user option must be
specified to identify the trigger(s) to be cleared. Only user root or the trigger's creator can
delete a trigger.
-M, --clusters=<string>
Clusters to issue commands to. Note that the SlurmDBD must be up for this option to work
properly.
-d, --down
Trigger an event if the specified node goes into a DOWN state.
-D, --drained
Trigger an event if the specified node goes into a DRAINED state.
--draining
Trigger an event if the specified node goes into a DRAINING state, before it is DRAINED.
-F, --fail
Trigger an event if the specified node goes into a FAILING state.
-f, --fini
Trigger an event when the specified job completes execution.
--flags=<flag>
Associate flags with the reservation. Multiple flags should be comma separated. Valid flags
include:
PERM Make the trigger permanent. Do not purge it after the event occurs.
--front_end
Trigger events based upon changes in state of front end nodes rather than compute nodes. Use this
option with either the --up or --down option.
--get Show registered event triggers. Options can be used for filtering purposes.
-i, --id=<id>
Trigger ID number.
-I, --idle
Trigger an event if the specified node remains in an IDLE state for at least the time period
specified by the --offset option. This can be useful to hibernate a node that remains idle, thus
reducing power consumption.
-j, --jobid=<id>
Job ID of interest. NOTE: The --jobid option can not be used in conjunction with the --node
option. When the --jobid option is used in conjunction with the --up or --down option, all nodes
allocated to that job will considered the nodes used as a trigger event.
-n, --node[=host]
Host name(s) of interest. By default, all nodes associated with the job (if --jobid is specified)
or on the system are considered for event triggers. NOTE: The --node option can not be used in
conjunction with the --jobid option. When the --jobid option is used in conjunction with the --up,
--down or --drained option, all nodes allocated to that job will considered the nodes used as a
trigger event. Since this option's argument is optional, for proper parsing the single letter
option must be followed immediately with the value and not include a space between them. For
example "-ntux" and not "-n tux".
-N, --noheader
Do not print the header when displaying a list of triggers.
-o, --offset=<seconds>
The specified action should follow the event by this time interval. Specify a negative value if
action should preceded the event. The default value is zero if no --offset option is specified.
The resolution of this time is about 20 seconds, so to execute a script not less than five minutes
prior to a job reaching its time limit, specify --offset=320 (5 minutes plus 20 seconds).
-h, --primary_database_failure
Trigger an event when the primary database fails. This event is triggered when the accounting
plugin tries to open a connection with mysql and it fails and the slurmctld needs the database for
some operations.
-H, --primary_database_resumed_operation
Trigger an event when the primary database resumes operation after failure. It happens when the
connection to mysql from the accounting plugin is restored.
-g, --primary_slurmdbd_failure
Trigger an event when the primary slurmdbd fails. The trigger is launched by slurmctld in the
occasions it tries to connect to slurmdbd, but receives no response on the socket.
-G, --primary_slurmdbd_resumed_operation
Trigger an event when the primary slurmdbd resumes operation after failure. This event is
triggered when opening the connection from slurmctld to slurmdbd results in a response. It can
happen also in different situations, periodically every 15 seconds when checking the connection
status, when saving state, when agent queue is filling, and so on.
-e, --primary_slurmctld_acct_buffer_full
Trigger an event when primary slurmctld accounting buffer is full.
-a, --primary_slurmctld_failure
Trigger an event when the primary slurmctld fails.
-b, --primary_slurmctld_resumed_control
Trigger an event when primary slurmctld resumes control.
-A, --primary_slurmctld_resumed_operation
Trigger an event when the primary slurmctld resuming operation after failure.
-p, --program=<path>
Execute the program at the specified fully qualified pathname when the event occurs. You may
quote the path and include extra program arguments if desired. The program will be executed as
the user who sets the trigger. If the program fails to terminate within 5 minutes, it will be
killed along with any spawned processes.
-Q, --quiet
Do not report non-fatal errors. This can be useful to clear triggers which may have already been
purged.
-r, --reconfig
Trigger an event when the system configuration changes. This is triggered when the slurmctld
daemon reads its configuration file or when a node state changes.
-R, --resume
Trigger an event if the specified node is set to the RESUME state.
--set Register an event trigger based upon the supplied options. NOTE: An event is only triggered once.
A new event trigger must be set established for future events of the same type to be processed.
Triggers can only be set if the command is run by the user SlurmUser unless SlurmUser is
configured as user root.
-t, --time
Trigger an event when the specified job's time limit is reached. This must be used in conjunction
with the --jobid option.
-u, --up
Trigger an event if the specified node is returned to service from a DOWN state.
--user=<user_name_or_id>
Clear or get triggers created by the specified user. For example, a trigger created by user root
for a job created by user adam could be cleared with an option --user=root. Specify either a user
name or user ID.
-v, --verbose
Print detailed event logging. This includes time-stamps on data structures, record counts, etc.
-V , --version
Print version information and exit.
OUTPUT FIELD DESCRIPTIONS
TRIG_ID
Trigger ID number.
RES_TYPE
Resource type: job or node
RES_ID Resource ID: job ID or host names or "*" for any host
TYPE Trigger type: time or fini (for jobs only), down or up (for jobs or nodes), or drained, idle or
reconfig (for nodes only)
OFFSET Time offset in seconds. Negative numbers indicated the action should occur before the event (if
possible)
USER Name of the user requesting the action
PROGRAM
Pathname of the program to execute when the event occurs
PERFORMANCE
Executing strigger sends a remote procedure call to slurmctld. If enough calls from strigger or other
Slurm client commands that send remote procedure calls to the slurmctld daemon come in at once, it can
result in a degradation of performance of the slurmctld daemon, possibly resulting in a denial of
service.
Do not run strigger or other Slurm client commands that send remote procedure calls to slurmctld from
loops in shell scripts or other programs. Ensure that programs limit calls to strigger to the minimum
necessary for the information you are trying to gather.
ENVIRONMENT VARIABLES
Some strigger options may be set via environment variables. These environment variables, along with their
corresponding options, are listed below. (Note: Command line options will always override these
settings.)
SLURM_CONF The location of the Slurm configuration file.
SLURM_DEBUG_FLAGS Specify debug flags for strigger to use. See DebugFlags in the slurm.conf(5) man page
for a full list of flags. The environment variable takes precedence over the setting
in the slurm.conf.
EXAMPLES
Execute the program "/usr/sbin/primary_slurmctld_failure" whenever the primary slurmctld fails.
$ cat /usr/sbin/primary_slurmctld_failure
#!/bin/bash
# Submit trigger for next primary slurmctld failure event
strigger --set --primary_slurmctld_failure \
--program=/usr/sbin/primary_slurmctld_failure
# Notify the administrator of the failure using e-mail
/usr/bin/mail slurm_admin@site.com -s Primary_SLURMCTLD_FAILURE
$ strigger --set --primary_slurmctld_failure \
--program=/usr/sbin/primary_slurmctld_failure
Execute the program "/usr/sbin/slurm_admin_notify" whenever any node in the cluster goes down. The
subject line will include the node names which have entered the down state (passed as an argument to the
script by Slurm).
$ cat /usr/sbin/slurm_admin_notify
#!/bin/bash
# Submit trigger for next event
strigger --set --node --down \
--program=/usr/sbin/slurm_admin_notify
# Notify administrator using by e-mail
/usr/bin/mail slurm_admin@site.com -s NodesDown:$*
$ strigger --set --node --down \
--program=/usr/sbin/slurm_admin_notify
Execute the program "/usr/sbin/slurm_suspend_node" whenever any node in the cluster remains in the idle
state for at least 600 seconds.
$ strigger --set --node --idle --offset=600 \
--program=/usr/sbin/slurm_suspend_node
Execute the program "/home/joe/clean_up" when job 1234 is within 10 minutes of reaching its time limit.
$ strigger --set --jobid=1234 --time --offset=-600 \
--program=/home/joe/clean_up
Execute the program "/home/joe/node_died" when any node allocated to job 1234 enters the DOWN state.
$ strigger --set --jobid=1234 --down \
--program=/home/joe/node_died
Show all triggers associated with job 1235.
$ strigger --get --jobid=1235
TRIG_ID RES_TYPE RES_ID TYPE OFFSET USER PROGRAM
123 job 1235 time -600 joe /home/bob/clean_up
125 job 1235 down 0 joe /home/bob/node_died
Delete event trigger 125.
$ strigger --clear --id=125
Execute /home/joe/job_fini upon completion of job 1237.
$ strigger --set --jobid=1237 --fini --program=/home/joe/job_fini
COPYING
Copyright (C) 2007 The Regents of the University of California. Produced at Lawrence Livermore National
Laboratory (cf, DISCLAIMER).
Copyright (C) 2008-2010 Lawrence Livermore National Security.
Copyright (C) 2010-2022 SchedMD LLC.
This file is part of Slurm, a resource management program. For details, see
<https://slurm.schedmd.com/>.
Slurm is free software; you can redistribute it and/or modify it under the terms of the GNU General
Public License as published by the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
Slurm is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
SEE ALSO
scontrol(1), sinfo(1), squeue(1)
January 2024 Slurm Commands strigger(1)