Slurm Workload Manager -

    .br
    \fBstrigger \-\-get\fR   [\fIOPTIONS\fR...]
    .br
    \fBstrigger \-\-clear\fR [\fIOPTIONS\fR...]

    .SH "DESCRIPTION"
    \fBstrigger\fR 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.

    \fBIMPORTANT NOTE:\fR This command can only set triggers if run by the
    user \fISlurmUser\fR unless \fISlurmUser\fR is configured as user root.
    This is required for the \fIslurmctld\fR 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
    \fIslurmctld\fR daemon uses rather than some allocated compute node.
    To check the value of \fISlurmUser\fR, run the command:

    \fIscontrol show config | grep SlurmUser\fR

    .SH "ARGUMENTS"
    .TP
    \fB\-a\fR, \fB\-\-primary_slurmctld_failure\fR
    Trigger an event when the primary slurmctld fails.

    .TP
    \fB\-A\fR, \fB\-\-primary_slurmctld_resumed_operation\fR
    Trigger an event when the primary slurmctld resuming operation after failure.

    .TP
    \fB\-b\fR, \fB\-\-primary_slurmctld_resumed_control\fR
    Trigger an event when primary slurmctld resumes control.

    \fB\-\-burst_buffer\fR
    Trigger event when burst buffer error occurs.

    .TP
    \fB\-\-clear\fP
    Clear or delete a previously defined event trigger.
    The \fB\-\-id\fR, \fB\-\-jobid\fR or \fB\-\-user\fR
    option must be specified to identify the trigger(s) to
    be cleared.
    Only user root or the trigger's creator can delete a trigger.

    .TP
    \fB\-d\fR, \fB\-\-down\fR
    Trigger an event if the specified node goes into a DOWN state.

    .TP
    \fB\-D\fR, \fB\-\-drained\fR
    Trigger an event if the specified node goes into a DRAINED state.

    .TP
    \fB\-e\fR, \fB\-\-primary_slurmctld_acct_buffer_full\fR
    Trigger an event when primary slurmctld accounting buffer is full.

    .TP
    \fB\-F\fR, \fB\-\-fail\fR
    Trigger an event if the specified node goes into a FAILING state.

    .TP
    \fB\-f\fR, \fB\-\-fini\fR
    Trigger an event when the specified job completes execution.

    .TP
    \fB\-\-flags\fR=\fItype\fR
    Associate flags with the reservation. Multiple flags should be comma separated.
    Valid flags include:
    .RS
    .TP
    PERM
    Make the trigger permanent. Do not purge it after the event occurs.
    .RE

    .TP
    \fB\-\-front_end\fR
    Trigger events based upon changes in state of front end nodes rather than
    compute nodes. Applies to Cray ALPS architectures only, where the
    slurmd daemon executes on front end nodes rather than the compute nodes.
    Use this option with either the \fB\-\-up\fR or \fB\-\-down\fR option.

    .TP
    \fB\-g\fR, \fB\-\-primary_slurmdbd_failure\fR
    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

    .TP
    \fB\-h\fR, \fB\-\-primary_database_failure\fR
    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.

    .TP
    \fB\-H\fR, \fB\-\-primary_database_resumed_operation\fR
    Trigger an event when the primary database resumes operation after failure.
    It happens when the connection to mysql from the accounting plugin is restored.

    .TP
    \fB\-i\fR, \fB\-\-id\fR=\fIid\fR
    Trigger ID number.

    .TP
    \fB\-I\fR, \fB\-\-idle\fR
    Trigger an event if the specified node remains in an IDLE state
    for at least the time period specified by the \fB\-\-offset\fR
    option. This can be useful to hibernate a node that remains idle,
    thus reducing power consumption.

    .TP
    \fB\-j\fR, \fB\-\-jobid\fR=\fIid\fR
    Job ID of interest.
    \fBNOTE:\fR The \fB\-\-jobid\fR option can not be used in conjunction
    with the \fB\-\-node\fR option. When the \fB\-\-jobid\fR option is
    used in conjunction with the \fB\-\-up\fR or \fB\-\-down\fR option,
    all nodes allocated to that job will considered the nodes used as a
    trigger event.

    .TP
    \fB\-M\fR, \fB\-\-clusters\fR=<\fIstring\fR>
    Clusters to issue commands to.
    Note that the SlurmDBD must be up for this option to work properly.

    .TP
    \fB\-n\fR, \fB\-\-node\fR[=\fIhost\fR]
    Host name(s) of interest.
    By default, all nodes associated with the job (if \fB\-\-jobid\fR
    is specified) or on the system are considered for event triggers.
    \fBNOTE:\fR The \fB\-\-node\fR option can not be used in conjunction
    with the \fB\-\-jobid\fR option. When the \fB\-\-jobid\fR option is
    used in conjunction with the \fB\-\-up\fR, \fB\-\-down\fR or
    \fB\-\-drained\fR 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".

    \fB\-p\fR, \fB\-\-program\fR=\fIpath\fR
    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.

    .TP
    \fB\-Q\fR, \fB\-\-quiet\fR
    Do not report non\-fatal errors.
    This can be useful to clear triggers which may have already been purged.

    .TP
    \fB\-r\fR, \fB\-\-reconfig\fR
    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.

    .TP
    \fB\-\-set\fP
    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
    \fISlurmUser\fR unless \fISlurmUser\fR is configured as user root.

    .TP
    \fB\-t\fR, \fB\-\-time\fR
    Trigger an event when the specified job's time limit is reached.
    This must be used in conjunction with the \fB\-\-jobid\fR option.

    .TP
    \fB\-u\fR, \fB\-\-up\fR
    Trigger an event if the specified node is returned to service
    from a DOWN state.

    .TP
    \fB\-\-user\fR=\fIuser_name_or_id\fR
    Clear or get triggers created by the specified user.
    For example, a trigger created by user \fIroot\fR for a job created by user
    \fIadam\fR could be cleared with an option \fI\-\-user=root\fR.
    Specify either a user name or user ID.

    .TP
    \fB\-v\fR, \fB\-\-verbose\fR
    Print detailed event logging. This includes time\-stamps on data structures,
    record counts, etc.

    .TP
    \fB\-V\fR , \fB\-\-version\fR

    .TP
    \fBTYPE\fP
    Trigger type: \fItime\fR or \fIfini\fR (for jobs only),
    \fIdown\fR or \fIup\fR (for jobs or nodes), or
    \fIdrained\fR, \fIidle\fR or \fIreconfig\fR (for nodes only)

    .TP
    \fBOFFSET\fP
    Time offset in seconds. Negative numbers indicated the action should
    occur before the event (if possible)

    .TP
    \fBUSER\fP
    Name of the user requesting the action

    .TP
    \fBPROGRAM\fP
    Pathname of the program to execute when the event occurs

    .SH "PERFORMANCE"
    .PP
    Executing \fBstrigger\fR sends a remote procedure call to \fBslurmctld\fR. If
    enough calls from \fBstrigger\fR or other Slurm client commands that send remote
    procedure calls to the \fBslurmctld\fR daemon come in at once, it can result in
    a degradation of performance of the \fBslurmctld\fR daemon, possibly resulting
    in a denial of service.
    .PP
    Do not run \fBstrigger\fR or other Slurm client commands that send remote
    procedure calls to \fBslurmctld\fR from loops in shell scripts or other
    programs. Ensure that programs limit calls to \fBstrigger\fR to the minimum
    necessary for the information you are trying to gather.

    .SH "ENVIRONMENT VARIABLES"
    .PP
    Some \fBstrigger\fR options may be set via environment variables. These
    environment variables, along with their corresponding options, are listed below.
    (Note: commandline options will always override these settings)
    .TP 20
    \fBSLURM_CONF\fR
    The location of the Slurm configuration file.

    .SH "EXAMPLES"
    Execute the program "/usr/sbin/primary_slurmctld_failure" whenever the
    primary slurmctld fails.

    .nf
    > 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

    > 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
    .fi

    .PP
    Execute the program "/usr/sbin/slurm_suspend_node" whenever
    any node in the cluster remains in the idle state for at least
    600 seconds.

    .nf
    > strigger \-\-set \-\-node \-\-idle \-\-offset=600 \\
               \-\-program=/usr/sbin/slurm_suspend_node
    .fi

    .PP
    Execute the program "/home/joe/clean_up" when job 1234 is within
    10 minutes of reaching its time limit.

    .nf
    > strigger \-\-set \-\-jobid=1234 \-\-time \-\-offset=-600 \\
               \-\-program=/home/joe/clean_up
    .fi

    .PP
    Execute the program "/home/joe/node_died" when any node allocated to
    job 1234 enters the DOWN state.

    .nf
    > strigger \-\-set \-\-jobid=1234 \-\-down \\
               \-\-program=/home/joe/node_died
    .fi

    .PP
    Show all triggers associated with job 1235.

    .nf
    > 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
    .fi

    .PP
    Delete event trigger 125.
    Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
    .br
    Copyright (C) 2008\-2010 Lawrence Livermore National Security.
    .br
    Copyright (C) 2010\-2013 SchedMD LLC.
    .LP
    This file is part of Slurm, a resource management program.
    For details, see <https://slurm.schedmd.com/>.
    .LP
    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.
    .LP
    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.

    .SH "SEE ALSO"
    \fBscontrol\fR(1), \fBsinfo\fR(1), \fBsqueue\fR(1)