pmdadocker(1) — Linux manual page


PMDADOCKER(1)              General Commands Manual             PMDADOCKER(1)

NAME         top

       pmdadocker - docker performance metrics domain agent (PMDA)

SYNOPSIS         top

       $PCP_PMDAS_DIR/pmdadocker [-d domain] [-l logfile]

DESCRIPTION         top

       pmdadocker is a docker Performance Metrics Domain Agent (PMDA) which
       exposes performance metrics as reported from the Docker Remote API.

       A brief description of the pmdadocker command line options follows:

       -d   It is absolutely crucial that the performance metrics domain
            number specified here is unique and consistent.  That is, domain
            should be different for every PMDA on the one host, and the same
            domain number should be used for the same PMDA on all hosts.

       -l   Location of the log file.  By default, a log file named
            docker.log is written in the current directory of pmcd(1) when
            pmdadocker is started, i.e.  $PCP_LOG_DIR/pmcd.  If the log file
            cannot be created or is not writable, output is written to the
            standard error instead.

       Remote API metric requests are activated automatically and are
       fetched on a timer.  This timer is represented as a by pmdadocker via
       the docker.control.timing.  By default, pmdadocker will be set to
       fetch on a 1 second interval.

       pmdadocker will iterate over three different docker remote API calls:

              Container metrics regarding the current state of the
              container. Such as PID, name or if the container is running.

              Basic version metrics about the current docker deamon in use.

              More in depth memory and cpu metrics of the container.

INSTALLATION         top

       If you want access to the names, help text and values for the docker
       performance metrics, do the following as root:

            # cd $PCP_PMDAS_DIR/docker
            # ./Install

       If you want to undo the installation (and remove both PMDAs), do the
       following as root:

            # cd $PCP_PMDAS_DIR/docker
            # ./Remove

       pmdadocker is launched by pmcd(1) and should never be executed
       directly.  The Install and Remove scripts notify pmcd(1) when the
       agent is installed or removed.

FILES         top

                 command line options used to launch pmdadocker
                 default help text file for the docker metrics
                 installation script for the pmdadocker agent
                 undo installation script for the pmdadocker agent
                 default log file for error messages and other information
                 from pmdadocker


       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).  In particular, the
       $PCP_DOCKER_DIR may be set to change the default directory from

SEE ALSO         top

       PCPIntro(1), pmcd(1), pcp.conf(5), pcp.env(5) and docker(1).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-08-13.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-08-11.)  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

Performance Co-Pilot                 PCP                       PMDADOCKER(1)