NAME

       pmdaapache - Apache2 web server performance metrics domain agent (PMDA)

SYNOPSIS

       $PCP_PMDAS_DIR/apache/pmdaapache  [-d  domain]  [-l logfile] [-U username] [-S server] [-P
       port] [-L location]

DESCRIPTION

       pmdaapache is a Performance Metrics Domain Agent (PMDA) which extracts performance metrics
       describing the state of an Apache web server.

       The  apache  PMDA exports metrics that measure the request rate, cumulative request sizes,
       uptime and various connection states for active clients.

       This information is obtained by performing a HTTP request to the server status URL,  which
       must be enabled in the httpd.conf configuration file.

            ExtendedStatus on
            <Location /server-status>
            SetHandler server-status
            Order deny,allow
            Deny from all
            Allow from localhost
            </Location>

       A brief description of the pmdaapache 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 apache.log is written in the
            current directory of pmcd(1) when pmdaapache 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.

       -S   Query the Apache status information from the named server rather than the local host.

       -P   Query the Apache status information from the given port rather than the default (80).

       -L   Specify an alternative location for finding the server-status page.

       -U   User account under which to run the agent.  The default  is  the  unprivileged  "pcp"
            account  in  current  versions  of  PCP,  but in older versions the superuser account
            ("root") was used by default.

INSTALLATION

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

            # cd $PCP_PMDAS_DIR/apache
            # ./Install

       If you want to undo the installation, do the following as root:

            # cd $PCP_PMDAS_DIR/apache
            # ./Remove

       pmdaapache  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

       $PCP_PMCDCONF_PATH
                 command line options used to launch pmdaapache
       $PCP_PMDAS_DIR/apache/help
                 default help text file for the apache metrics
       $PCP_PMDAS_DIR/apache/Install
                 installation script for the pmdaapache agent
       $PCP_PMDAS_DIR/apache/Remove
                 undo installation script for the pmdaapache agent
       $PCP_LOG_DIR/pmcd/apache.log
                 default log file for error messages and other information from pmdaapache

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).

SEE ALSO

       PCPIntro(1), httpd(8), pmcd(1), pcp.conf(5) and pcp.env(5).