pmdanginx

Description

pmdanginx is a Performance Metrics Domain Agent (PMDA) which exports performance metrics from nginx(8) - an HTTP and reverse proxy server, a mail proxy server, and a generic TCP proxy server.

Installation

This PMDA requires that the nginx stub_status module is active and available at http://localhost/nginx_status

In order to enable this module, the "server" section of the nginx.conf configuration file should contain the following.

location /nginx_status {
    stub_status on;
    access_log off;
    allow 127.0.0.1;
    allow ::1;
    deny all;
}

Instrumentation availability can be verified using these commands (compile-time then run-time checks):

     # nginx -V 2>&1 | grep -o with-http_stub_status_module
     # curl http://localhost/nginx_status

Install the nginx PMDA by using the Install script as root:

     # cd $PCP_PMDAS_DIR/nginx
     # ./Install

To uninstall, do the following as root:

     # cd $PCP_PMDAS_DIR/nginx
     # ./Remove

pmdanginx 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_PMDAS_DIR/nginx/nginx.conf

optional configuration file for pmdanginx

$PCP_PMDAS_DIR/nginx/Install

installation script for the pmdanginx agent

$PCP_PMDAS_DIR/nginx/Remove

undo installation script for the pmdanginx agent

$PCP_LOG_DIR/pmcd/nginx.log

default log file for error messages from pmdanginx

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

pmcd(1) and nginx(8).

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