munin

Get status of apache (80) and lighttpd (81) on different ports:

This is done at the nodes.

1. Enable apache server-status in httpd.conf :
   
   <Location /server-status> 
    SetHandler server-status
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
</Location>

2. Enable lighttpd server-status in lighttpd.conf :
   
   $HTTP["remoteip"] == "127.0.0.1" {
status.status-url          = "/server-status"
}

3. Create /etc/munin/plugin-conf.d/apache:
   
   [apache*]
env ports="80 81" 

   * Test with:
   

   ports="80 83" /etc/munin/plugins/apache_processes

lighttpd idle process will be a straight line as total of busy and idle process is always the same when drawn as STACK, . To change this to LINE1:

At the host, edit "/etc/munin/munin.conf" and add the below line to the corresponding host:

HDD Temperature

You can usually identify which hard disks are on your system by looking in "/proc/ide" and in "/proc/scsi".

`fdisk -l` lists the two drives as "sda" and "sdb".

Munin is network monitoring tool for servers. It uses RRDTool, an open source used to generate graphics and logging server activities.

I am installing and configuring munin on centos 5 x86_64 using yum.
1)First of all, we need to add a RPMforge repository.

2)Installing yum

3)chaning the ownership of munin web docroot to munin, as by default it goes to root.