Ubuntu Manpage: pcp2json - pcp-to-json metrics exporter

NAME

       pcp2json - pcp-to-json metrics exporter

SYNOPSIS

       pcp2json  [-CEGHIjLnrRvVxXz?]   [-8|-9  limit]  [-a  archive]  [--archive-folio folio] [-A
       align] [-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

       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

       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, instances, live_filter,
       rank, limit_filter, limit_filter_force, invert_filter,  predicate,  omit_flat,  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.   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

The available command line options are:

-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 argument archive, 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.

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

-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.

-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
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).

-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). Doing live
filtering over a huge amount of instances naturally comes with some overhead so a bit
of user caution is advised.

-J rank, --rank=rank
Limit results to highest/lowest rank 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.
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 filter 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.

-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 predicate filter
reference metrics, ranking is done only for the specified metrics. When reporting,
the rest of the metrics sharing the same instance domain (see PCPIntro(1)) as the
predicates will include only the highest/lowest ranking instances of the
corresponding predicates.

So for example, when the using proc.memory.rss (resident size of process) as the
predicate and including proc.io.total_bytes and mem.util.used as metrics to be
reported, only the processes using most/least memory (as per -J) 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.

-0 precision, --precision-force=precision
Like -P but this option will override 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 argument samples 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
The default update interval may be set 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.

-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

       pcp2json.conf
              pcp2json configuration file (see -c)

PCP ENVIRONMENT

       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).