pcp2json(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION FILE | OPTIONS | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON

PCP2JSON(1)              General Commands Manual             PCP2JSON(1)

NAME         top

       pcp2json - pcp-to-json metrics exporter

SYNOPSIS         top

       pcp2json [-5CEGHIjLmnrRvVxXz?]  [-4 action] [-8|-9 limit] [-a
       archive] [-A align] [--archive-folio folio] [-b|-B space-scale]
       [-c config] [--container container] [--daemonize] [-e derived]
       [-f format] [-F outfile] [-h host] [-i instances] [-J rank] [-K
       spec] [-N predicate] [-O origin] [-P|-0 precision] [-q|-Q count-
       scale] [-s samples] [-S starttime] [-t interval] [-T endtime]
       [-y|-Y time-scale] [-Z timezone] metricspec [...]

DESCRIPTION         top

       pcp2json is a customizable performance metrics exporter tool from
       PCP to JSON.  Any available performance metric, live or archived,
       system and/or application, can be selected for exporting using
       either command line arguments or a configuration file.

       pcp2json is a close relative of pmrep(1).  Please refer to
       pmrep(1) for the metricspec description accepted on pcp2json
       command line and pmrep.conf(5) for description of the
       pcp2json.conf configuration file overall syntax, this page
       describes pcp2json specific options and configuration file
       differences with pmrep.conf(5).  pmrep(1) also lists some usage
       examples of which most are applicable with pcp2json as well.

       Only the command line options listed on this page are supported,
       other options recognized by pmrep(1) are not supported.

       Options via environment values (see pmGetOptions(3)) override the
       corresponding built-in default values (if any).  Configuration
       file options override the corresponding environment variables (if
       any).  Command line options override the corresponding
       configuration file options (if any).

CONFIGURATION FILE         top

       pcp2json uses a configuration file with overall syntax described
       in pmrep.conf(5).  The following options are common with
       pmrep.conf: version, source, speclocal, derived, header, globals,
       samples, interval, type, type_prefer, ignore_incompat,
       names_change, instances, live_filter, rank, limit_filter,
       limit_filter_force, invert_filter, predicate, omit_flat,
       include_labels, precision, precision_force, count_scale,
       count_scale_force, space_scale, space_scale_force, time_scale,
       time_scale_force.  The output option is recognized but ignored
       for pmrep.conf compatibility.

   pcp2json specific options
       extended (boolean)
           Write extended information about metrics.  Corresponding
           command line option is -x.  Default is no.

       everything (boolean)
           Write everything known about metrics, including PCP internal
           IDs.  Labels are, however, omitted for backward
           compatibility, use include_labels yes to include them as
           well.  Corresponding command line option is -X.  Default is
           no.

       exact_types (boolean)
           Write numbers as number data types, not as strings,
           potentially losing some precision.  Corresponding command
           line option is -E.  Default is no.

OPTIONS         top

       The available command line options are:

       -0 precision, --precision-force=precision
            Like -P but this option will override per-metric
            specifications.

       -4 action, --names-change=action
            Specify which action to take on receiving a metric names
            change event during sampling.  These events occur when a
            PMDA discovers new metrics sometime after starting up, and
            informs running client tools like pcp2json.  Valid values
            for action are update (refresh metrics being sampled),
            ignore (do nothing - the default behaviour) and abort (exit
            the program if such an event happens).

       -5, --ignore-unknown
            Silently ignore any metric name that cannot be resolved.  At
            least one metric must be found for the tool to start.

       -8 limit, --limit-filter=limit
            Limit results to instances with values above/below limit.  A
            positive integer will include instances with values at or
            above the limit in reporting.  A negative integer will
            include instances with values at or below the limit in
            reporting.  A value of zero performs no limit filtering.
            This option will not override possible per-metric
            specifications.  See also -J and -N.

       -9 limit, --limit-filter-force=limit
            Like -8 but this option will override per-metric
            specifications.

       -a archive, --archive=archive
            Performance metric values are retrieved from the set of
            Performance Co-Pilot (PCP) archive log files identified by
            the archive argument, which is a comma-separated list of
            names, each of which may be the base name of an archive or
            the name of a directory containing one or more archives.

       -A align, --align=align
            Force the initial sample to be aligned on the boundary of a
            natural time unit align.  Refer to PCPIntro(1) for a
            complete description of the syntax for align.

       --archive-folio=folio
            Read metric source archives from the PCP archive folio
            created by tools like pmchart(1) or, less often, manually
            with mkaf(1).

       -b scale, --space-scale=scale
            Unit/scale for space (byte) metrics, possible values include
            bytes, Kbytes, KB, Mbytes, MB, and so forth.  This option
            will not override possible per-metric specifications.  See
            also pmParseUnitsStr(3).

       -B scale, --space-scale-force=scale
            Like -b but this option will override per-metric
            specifications.

       -c config, --config=config
            Specify the config file to use.  The default is the first
            found of: ./pcp2json.conf, $HOME/.pcp2json.conf,
            $HOME/pcp/pcp2json.conf, and $PCP_SYSCONF_DIR/pcp2json.conf.
            For details, see the above section and pmrep.conf(5).

       --container=container
            Fetch performance metrics from the specified container,
            either local or remote (see -h).

       -C, --check
            Exit before reporting any values, but after parsing the
            configuration and metrics and printing possible headers.

       --daemonize
            Daemonize on startup.

       -e derived, --derived=derived
            Specify derived performance metrics.  If derived starts with
            a slash (``/'') or with a dot (``.'') it will be interpreted
            as a derived metrics configuration file, otherwise it will
            be interpreted as comma- or semicolon-separated derived
            metric expressions.  For details see pmLoadDerivedConfig(3)
            and pmRegisterDerived(3).

       -E, --exact-types
            Write numbers as number data types, not as strings,
            potentially losing some precision.

       -f format, --timestamp-format=format
            Use the format string for formatting the timestamp.  The
            format will be used with Python's datetime.strftime method
            which is mostly the same as that described in strftime(3).
            The default is %Y-%m-%d %H:%M:%S.

       -F outfile, --output-file=outfile
            Specify the output file outfile.

       -G, --no-globals
            Do not include global metrics in reporting (see
            pmrep.conf(5)).

       -h host, --host=host
            Fetch performance metrics from pmcd(1) on host, rather than
            from the default localhost.

       -H, --no-header
            Do not print any headers.

       -i instances, --instances=instances
            Report only the listed instances from current instances (if
            present, see also -j).  By default all instances, present
            and future, are reported.  This is a global option that is
            used for all metrics unless a metric-specific instance
            definition is provided as part of a metricspec.  By default
            single-valued ``flat'' metrics without multiple instances
            are still reported as usual, use -v to change this.  Please
            refer to pmrep(1) for more details on this option.

       -I, --ignore-incompat
            Ignore incompatible metrics.  By default incompatible
            metrics (that is, their type is unsupported or they cannot
            be scaled as requested) will cause pcp2json to terminate
            with an error message.  With this option all incompatible
            metrics are silently omitted from reporting.  This may be
            especially useful when requesting non-leaf nodes of the PMNS
            tree for reporting.

       -j, --live-filter
            Perform instance live filtering.  This allows capturing all
            filtered instances even if processes are restarted at some
            point (unlike without live filtering).  Performing live
            filtering over a huge amount of instances will add some
            internal overhead so a bit of user caution is advised.  See
            also -n.

       -J rank, --rank=rank
            Limit results to highest/lowest ranked instances of set-
            valued metrics.  A positive integer will include highest
            valued instances in reporting.  A negative integer will
            include lowest valued instances in reporting.  A value of
            zero performs no ranking.  Ranking does not imply sorting,
            see -6.  See also -8.

       -K spec, --spec-local=spec
            When fetching metrics from a local context (see -L), the -K
            option may be used to control the DSO PMDAs that should be
            made accessible.  The spec argument conforms to the syntax
            described in pmSpecLocalPMDA(3).  More than one -K option
            may be used.

       -L, --local-PMDA
            Use a local context to collect metrics from DSO PMDAs on the
            local host without PMCD.  See also -K.

       -n, --invert-filter
            Perform ranking before live filtering.  By default instance
            live filtering (when requested, see -j) happens before
            instance ranking (when requested, see -J).  With this option
            the logic is inverted and ranking happens before live
            filtering.

       -m, --include-labels
            Include metric labels in the output.

       -N predicate, --predicate=predicate
            Specify a comma-separated list of predicate filter reference
            metrics.  By default ranking (see -J) happens for each
            metric individually.  With predicates, ranking is done only
            for the specified predicate metrics.  When reporting, rest
            of the metrics sharing the same instance domain (see
            PCPIntro(1)) as the predicate will include only the
            highest/lowest ranking instances of the corresponding
            predicate.  Ranking does not imply sorting, see -6.

            So for example, using proc.memory.rss (resident memory size
            of process) as the predicate metric together with
            proc.io.total_bytes and mem.util.used as metrics to be
            reported, only the processes using most/least (as per -J)
            memory will be included when reporting total bytes written
            by processes.  Since mem.util.used is a single-valued metric
            (thus not sharing the same instance domain as the process-
            related metrics), it will be reported as usual.

       -O origin, --origin=origin
            When reporting archived metrics, start reporting at origin
            within the time window (see -S and -T).  Refer to
            PCPIntro(1) for a complete description of the syntax for
            origin.

       -P precision, --precision=precision
            Use precision for numeric non-integer output values.  The
            default is to use 3 decimal places (when applicable).  This
            option will not override possible per-metric specifications.

       -q scale, --count-scale=scale
            Unit/scale for count metrics, possible values include count
            x 10^-1, count, count x 10, count x 10^2, and so forth from
            10^-8 to 10^7.  (These values are currently space-
            sensitive.)  This option will not override possible per-
            metric specifications.  See also pmParseUnitsStr(3).

       -Q scale, --count-scale-force=scale
            Like -q but this option will override per-metric
            specifications.

       -r, --raw
            Output raw metric values, do not convert cumulative counters
            to rates.  This option will override possible per-metric
            specifications.

       -R, --raw-prefer
            Like -r but this option will not override per-metric
            specifications.

       -s samples, --samples=samples
            The samples argument defines the number of samples to be
            retrieved and reported.  If samples is 0 or -s is not
            specified, pcp2json will sample and report continuously (in
            real time mode) or until the end of the set of PCP archives
            (in archive mode).  See also -T.

       -S starttime, --start=starttime
            When reporting archived metrics, the report will be
            restricted to those records logged at or after starttime.
            Refer to PCPIntro(1) for a complete description of the
            syntax for starttime.

       -t interval, --interval=interval
            Set the reporting interval to something other than the
            default 1 second.  The interval argument follows the syntax
            described in PCPIntro(1), and in the simplest form may be an
            unsigned integer (the implied units in this case are
            seconds).  See also the -T option.

       -T endtime, --finish=endtime
            When reporting archived metrics, the report will be
            restricted to those records logged before or at endtime.
            Refer to PCPIntro(1) for a complete description of the
            syntax for endtime.

            When used to define the runtime before pcp2json will exit,
            if no samples is given (see -s) then the number of reported
            samples depends on interval (see -t).  If samples is given
            then interval will be adjusted to allow reporting of samples
            during runtime.  In case all of -T, -s, and -t are given,
            endtime determines the actual time pcp2json will run.

       -v, --omit-flat
            Omit single-valued ``flat'' metrics from reporting, only
            consider set-valued metrics (i.e., metrics with multiple
            values) for reporting.  See -i and -I.

       -V, --version
            Display version number and exit.

       -x, --with-extended
            Write extended information.

       -X, --with-everything
            Write everything known about metrics, including PCP internal
            IDs.  Labels are, however, omitted for backward
            compatibility, use -m to include them as well.

       -y scale, --time-scale=scale
            Unit/scale for time metrics, possible values include
            nanosec, ns, microsec, us, millisec, ms, and so forth up to
            hour, hr.  This option will not override possible per-metric
            specifications.  See also pmParseUnitsStr(3).

       -Y scale, --time-scale-force=scale
            Like -y but this option will override per-metric
            specifications.

       -z, --hostzone
            Use the local timezone of the host that is the source of the
            performance metrics, as identified by either the -h or the
            -a options.  The default is to use the timezone of the local
            host.

       -Z timezone, --timezone=timezone
            Use timezone for the date and time.  Timezone is in the
            format of the environment variable TZ as described in
            environ(7).  Note that when including a timezone string in
            output, ISO 8601 -style UTC offsets are used (so something
            like -Z EST+5 will become UTC-5).

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

FILES         top

       pcp2json.conf
            pcp2json configuration file (see -c)

PCP ENVIRONMENT         top

       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).

       For environment variables affecting PCP tools, see
       pmGetOptions(3).

SEE ALSO         top

       mkaf(1), PCPIntro(1), pcp(1), pcp2elasticsearch(1),
       pcp2graphite(1), pcp2influxdb(1), pcp2spark(1), pcp2xlsx(1),
       pcp2xml(1), pcp2zabbix(1), pmcd(1), pminfo(1), pmrep(1),
       pmGetOptions(3), pmSpecLocalPMDA(3), pmLoadDerivedConfig(3),
       pmParseUnitsStr(3), pmRegisterDerived(3), LOGARCHIVE(5),
       pcp.conf(5), PMNS(5), pmrep.conf(5) and environ(7).

COLOPHON         top

       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 2020-12-18.
       (At that time, the date of the most recent commit that was found
       in the repository was 2020-12-18.)  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
       man-pages@man7.org

Performance Co-Pilot               PCP                       PCP2JSON(1)

Pages that refer to this page: pcp2elasticsearch(1)pcp2graphite(1)pcp2influxdb(1)pcp2spark(1)pcp2template(1)pcp2xlsx(1)pcp2xml(1)pcp2zabbix(1)pmrep(1)