Nginx: Monitoring Statistics

Script untuk monitoring statistics Nginx relatif mudah di instalasi dan di konfigurasi. Kita perlu melakukan langkah berikut untuk memperoleh gambar statistik dari server nginx.

Ubah konfigurasi file ngix dan tambahkan kalimat berikut

vi /etc/nginx/sites-enabled/default 

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

Test file konfigurasi

/etc/init.d/nginx stop
/usr/sbin/nginx -t

the configuration file /etc/nginx/nginx.conf syntax is ok
configuration file /etc/nginx/nginx.conf test is successful

Jika ada error tentang stub_status, check nginx. Nginx harusnya di konfigurasi dengan —-with-http_stub_status_module. Jika semua OK menggunakan shell lakukan test

# GET http://hostname.anda/nginx_status

Active connections: 1 
server accepts handled requests
 1 1 1 
Reading: 0 Writing: 1 Waiting: 0 

Download perl script: rrd_nginx.pl dan jadikan executable

cd /usr/local/src/
wget http://kovyrin.net/files/mrtg/rrd_nginx.pl.txt
mv rrd_nginx.pl.txt rrd_nginx.pl
chmod +x rrd_nginx.pl

Ubah setting di rrd_nginx.pl agar script tahu dimana menyimpan rrd-base dan image

vi /usr/local/src/rrd_nginx.pl

#!/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    /usr/local/rrd_nginx.pl 

When all preparations will be finished, you get images in your $img directory:

Referensi

• http://linxfo.wordpress.com/2008/03/08/monitoring-nginx-server-statistics-with-rrdtool/
• http://kovyrin.net/files/mrtg/rrd_nginx.pl.txt

Pranala Menarik

• Nginx
• Linux Howto