Monitoring nginx Server Statistics With rrdtool

This script is very easy to install and configure. You can use following steps to get pretty stats graph for your nginx-powered server:

• Modify your nginx config file and add following location to it:

http {
…
server {
listen SOME.IP.ADD.RESS;
…
location /nginx_status {
stub_status on;
access_log   off;
allow SOME.IP.ADD.RESS;
deny all;
}
…
}
…
}

 * Test your config file with following command:

 # /your/installation/sbin/nginx -t
2006/04/29 04:24:36 [info] 31676#0: the configuration file /opt/nginx/conf/nginx.conf syntax is ok
2006/04/29 04:24:36 [info] 31676#0: the configuration file /opt/nginx/conf/nginx.conf was tested successfully
#

If you will get error about stub_status directive, check your nginx – it should be configured with —-with-http_stub_status_module option.

If your configuration is OK, you can restart nginx and test it:

 # GET http://your-domain.com/nginx_status
Active connections: 1492
server accepts handled requests
2124355 2124355 8278635
Reading: 6 Writing: 405 Waiting: 1081

 Download  perl script: rrd_nginx.pl and make it executable with

# chmod +x rrd_nginx.pl

 Change settings in rrd_nginx.pl to let script know where it will save rrd-base and images:

 #!/usr/bin/perl
use RRDs;
use LWP::UserAgent;

# define location of rrdtool databases
my $rrd = ‘/opt/rrd’;
# define location of images
my $img = ‘/opt/rrd/html’;
# define your nginx stats URL
my $URL = “http://your-domain.com/nginx_status”;

 Last step is to insert following string to /etc/crontab file and to restart cron daemon:

* *     * * *   root    /some/path/rrd_nginx.pl  When all preparations will be finished, you get  images in your $img directory: ---------------------  Quoted from blog.kovyrin.net