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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFIGURATION | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON |
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PMFIND_CHECK(1) General Commands Manual PMFIND_CHECK(1)
pmfind_check - administration of Performance Co-Pilot discovery
$PCP_BINADM_DIR/pmfind_check [-CNV?] [-l logfile]
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 discovers.
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
pmseries(1).
The available command line options are:
-C, --containers
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.
$PCP_PMIECONTROL_PATH.d
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_PMLOGGERCONTROL_PATH.d
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.
$PCP_SYSCONFIG_DIR/pmfind
default pmie and pmlogger command line arguments, and other
parameters passed to pmfind.
$PCP_SYSCONF_DIR/pmfind/crontab
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).
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).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-14.) 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
man-pages@man7.org
Performance Co-Pilot PCP PMFIND_CHECK(1)
Pages that refer to this page: pcpcompat(1), pmfind(1)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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