PMFIND(1) General Commands Manual PMFIND(1)
pmfind - find PCP services on the network
pmfind [-CqrS?] [-m mechanism] [-s service] [-t timeout]
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. It can be used in conjunction with pmfind_check(1) to automate the monitoring of remote PCP collector systems.
The available command line options are: -C, --containers Performs containers discovery as well, for each discovered pmcd(1) service. -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), and pmproxy(1). -S, --sources Reports source identifiers for each discovered pmcd(1) service. These identifiers are unique for each host, and are formed using the (non-optional) context labels available for every PCP collector. Because the discovery process will often identify multiple paths to an individual collector host, this option is an important part of the process of using pmfind in conjunction with pmfind_check(1), to ensure only one pmie(1) and/or pmlogger(1) process is started for each discovered collector host. The source identifiers reported by pmfind are the same as the source identifiers reported by the pminfo(1) and pmseries(1) commands. -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.
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).
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.
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.
$PCP_BINADM_DIR/discover default path to address discovery scripts
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_check(1), pmie(1), pminfo(1), pmlogger(1), pmproxy(1), pmseries(1), pcp-kube-pods(1), PMAPI(3), PMWEBAPI(3), pmDiscoverServices(3), pcp.conf(5) and pcp.env(5).
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 firstname.lastname@example.org. This page was obtained from the project's upstream Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on 2020-06-09. (At that time, the date of the most recent commit that was found in the repository was 2020-06-09.) 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 email@example.com Performance Co-Pilot PCP PMFIND(1)
Pages that refer to this page: pcp-collectl(1), pcpcompat(1), PCPCompat(1), pcp-kube-pods(1), pmfind_check(1), pmmgr(1), pmwebd(1), pmdiscoverservices(3), pmDiscoverServices(3)