pmfind_check(1) — Linux manual page


PMFIND_CHECK(1)            General Commands Manual           PMFIND_CHECK(1)

NAME         top

       pmfind_check - administration of Performance Co-Pilot discovery

SYNOPSIS         top

       $PCP_BINADM_DIR/pmfind_check [-CNV?]  [-l logfile]

DESCRIPTION         top

       This shell script is used to integrate the Performance Co-Pilot (see
       PCPIntro(1)) collector service discovery mechanisms with pmie(1) and
       pmlogger(1) service administration, such that multiple collector
       hosts can be monitored from a single centralized host.  It is
       important to note that the pmfind service is tightly integrated with
       the pmie and pmlogger services, and these must also be enabled if the
       services are to be started for each collector system that pmfind

       pmfind_check is designed to be enabled via a service management
       daemon such as systemd(1) on Linux.  It is run from a system timer
       (either by systemd or by cron on other systems).  Once per timer
       interval pmfind attempts discovery of PCP collector systems.  For
       each unique system found pmfind_check creates pmie_check and
       pmlogger_check control file entries, such that these latter process
       can manage one pmie and pmlogger service for each discovered
       collector system.

       When run through systemd these processes will be launched immediately
       because systemd monitors the service control files for changes.  With
       systemd one may also initiate an immediate service discovery with
       pmfind and pmfind_check by modifying the $PCP_SYSCONF_DIR/pmfind
       directory in any way.

       When run from cron the next (also timer-based) invocation of
       pmie_check or pmlogger_check will start and manage the associated
       pmie and pmlogger processes.

       The control file entries created by pmfind_check follow the
       convention of individual files for each collector host.  The files
       are named using the (unique) source identifier that pmfind
       calculates.  This identifier is a hash calculated based on (non-
       optional) context labels available from every collector host, and is
       the same source identifier reported and used by pminfo(1) and

OPTIONS         top

       The available command line options are:

       -C   This option causes pmfind_check to query each discovered
            collector system for running containers as well, which will then
            be individually monitored.

       -l file, --logfile=file
            In order to ensure that mail is not unintentionally sent when
            these scripts are run from cron(8) diagnostics are always sent
            to log files.  By default, this file is
            $PCP_LOG_DIR/pmfind/pmfind_check.log but this can be changed
            using the -l option.  If this log file already exists when the
            script starts, it will be renamed with a .prev suffix
            (overwriting any log file saved earlier) before diagnostics are
            generated to the new log file.

       -N, --showme
            This option enables a ``show me'' mode, where the programs
            actions are echoed, but not executed, in the style of ``make
            -n''.  Using -N in conjunction with -V maximizes the diagnostic
            capabilities for debugging.

       -V, --verbose
            The output from the cron execution of the scripts may be
            extended using the -V option to the scripts which will enable
            verbose tracing of their activity.  By default the scripts
            generate no output unless some error or warning condition is
            encountered.  Using -N in conjunction with -V maximizes the
            diagnostic capabilities for debugging.

       -?, --help
            Display usage message and exit.


       The command line options passed to pmie and pmlogger can be
       customized via the $PCP_SYSCONFIG_DIR/pmfind configuration file.

       Refer to the pmie_check and pmlogger_check manual pages for details
       of the control file format generated by pmfind_check.

       By default, each collector system pmie logfile will be created in
       $PCP_LOG_DIR/pmie/source and pmlogger archives will be created below
       $PCP_ARCHIVE_DIR/source.  This is consistent with the way pmie(1) and
       pmlogger(1) maintain their activity logs and archive files.

       Typical crontab(5) entries for periodic execution of pmfind_check are
       given in $PCP_SYSCONF_DIR/pmfind/crontab (unless installed by default
       in /etc/cron.d already) and shown below.

       # every minute, discover remote PCP services
       *       *       *       *       *       $PCP_BINADM_DIR/pmfind_check
       When using systemd(1) on Linux, no crontab entries are needed as the
       timer and path mechanisms provided by systemd are used instead.

FILES         top

            PCP inference engine control files for each discovered metric
            source, typically one per host or container.
            Warning: this files herein must not be writable by any user
            other than root.

            PCP logger control files for each discovered metric source,
            typically one per host or container.
            Warning: this files herein must not be writable by any user
            other than root.

            default pmie and pmlogger command line arguments, and other
            parameters passed to pmfind.

            sample crontab for automated script execution by root - exists
            only if the platform does not support the /etc/cron.d mechanism.


       Environment variables with the prefix PCP_ are used to parameterize
       the file and directory names used by PCP.  On each installation, the
       file /etc/pcp.conf contains the local values for these variables.
       The $PCP_CONF variable may be used to specify an alternative
       configuration file, as described in pcp.conf(5).

SEE ALSO         top

       PCPIntro(1), pmcd(1), pmfind(1), pmie(1), pmie_check(1), pminfo(1),
       pmlogger(1), pmlogger_check(1), pmseries(1), systemd(1), crontab(5),
       and cron(8).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-09-18.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-09-18.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot                 PCP                     PMFIND_CHECK(1)

Pages that refer to this page: pcp-collectl(1)pcpcompat(1)PCPCompat(1)pmfind(1)pmmgr(1)pmwebd(1)