NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MECHANISMS | SIGNALS | DIAGNOSTICS | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON

PMFIND(1)                  General Commands Manual                 PMFIND(1)

NAME         top

       pmfind - find PCP services on the network

SYNOPSIS         top

       pmfind [-qr?]  [-m mechanism] [-s service] [-t timeout]

DESCRIPTION         top

       pmfind searches for instances of the specified PCP service being
       advertised on the network and prints a list of URLs corresponding to
       the services discovered.

OPTIONS         top

       -m mechanism, --mechanism=mechanism This option sets the mechanism
       that pmfind uses when performing service discovery.  By default, or
       if the keyword all is specified, every available mechanism will be
       used (iteratively).  See the ``MECHANISMS'' section for a description
       of each available discovery mechanism.

       -q, --quiet
              This option suppresses all output on the standard output
              stream.

       -r, --resolve
              Requests that DNS name resolution be attempted for the
              addresses of any discovered services.  The default is to
              display the network addresses of any discovered services.

       -s service, --service=service
              By default pmfind will search for all supported PCP services,
              however a specific PCP service to discover can be specified
              using the -s option.  Supported services are pmcd(1),
              pmproxy(1) and pmwebapi(3).

       -t seconds, --timeout=seconds
              Sets the maximum amount of time in seconds that pmfind will
              take before interrupting the service discovery.  The time
              argument is a floating point number representing the number of
              seconds before timing out.  The default is to take as much
              time as is needed to complete the process.

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

MECHANISMS         top

       Supported mechanisms for service discovery are:

       avahi  Searches for services which are broadcasting using mDNS via
              avahi-daemon(8).  An optional suffix ",timeout=N" may be added
              to limit the amount of time waiting for the avahi-daemon.  N
              is a floating point number specifying the number of seconds to
              wait.  The default is 0.5 seconds.  This timeout may also be
              specified by setting the environment variable
              AVAHI_DISCOVERY_TIMEOUT to the desired number of seconds.  If
              both are specified, then the value specified in the
              environment variable takes precedence.

       probe=<net-address>/<mask-bits>
              Actively probes the given subnet for the requested PCP
              service(s).  <net-address> is an Inet or IPv6 network address
              and <mask-bits> is the number of bits used to define the
              subnet.  For example, 192.168.1.0/24 defines an 8 bit subnet
              consisting of the addresses 192.168.1.0 through 192.168.1.255.
              An optional suffix ",maxThreads=N" may be added to limit the
              number of threads used while probing.  The default is the
              value of FD_SETSIZE (which is typically 1024) or the number of
              addresses in the subnet, whichever is less.  An optional
              suffix ",timeout=N" may be added to limit the amount of time
              spent waiting for each connection attempt.  N is a floating
              point number specifying the number of seconds to wait.  The
              default is 0.02 seconds (20 milliseconds).

       shell  Probes the list of addresses provided by scripts for requested
              PCP service(s).  Several optional, comma-separated parameters
              can also be provided.  The "path=DIR" option specifies the
              directory where commands like pcp-kube-pods(1) are located
              (defaults to $PCP_BINADM_DIR/discover/).  This setting can be
              further restricted to an individual command using the
              command=CMD option, but the default is to use all available
              commands from the path.  The "maxThreads=N" option limits the
              number of threads used while probing.  The default is the
              value of FD_SETSIZE (which is typically 1024) or the number of
              addresses returned by the scripts, whichever is less.  The
              "timeout=N" option may be added to limit the amount of time
              spent waiting for each connection attempt.  N is a floating
              point number specifying the number of seconds to wait.  The
              default is 0.02 seconds (20 milliseconds).

SIGNALS         top

       pmfind will interrupt the service discovery process when one of the
       following signals is received: SIGHUP, SIGPIPE, SIGINT, SIGTERM,
       SIGXFSZ, SIGXCPU.  pmfind will report any results which were
       discovered up to point of the interruption.

DIAGNOSTICS         top

       The value of the exit status from the command is zero when services
       were successfully located, one if no services were found, and two if
       an error occurred.

       In the event of an error a message will be generated on standard
       error that is intended to be self-explanatory.

FILES         top

       $PCP_BINADM_DIR/discover
                 default path to address discovery scripts

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).

SEE ALSO         top

       PCPIntro(1), pmcd(1), pmproxy(1), pcp-kube-pods(1), PMAPI(3),
       PMWEBAPI(3), pmDiscoverServices(3), pcp.conf(5) and pcp.env(5).

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
       2019-09-26.  (At that time, the date of the most recent commit that
       was found in the repository was 2019-09-26.)  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(1)

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