CentOS 5
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System Monitoring tool - Munin
2010/05/05
  Install Munin to monitor systems. httpd is also required to installed.

[1] Install Munin
[root@ns ~]#
yum --enablerepo=dag -y install munin*
 
# install from DAG


[root@ns ~]#
vi /etc/munin/munin.conf


# line 7: change

htmldir
/var/www/munin


# line 27: change to hostname

[
ns.server-linux.info
]
   address 127.0.0.1
   use_node_name yes

[root@ns ~]#
vi /etc/munin/munin-node.conf


# line 29: specify hostname

host_name
ns.server-linux.info


[root@ns ~]#
chown munin. /var/www/munin

[root@ns ~]#
/etc/rc.d/init.d/httpd restart

Stopping httpd:
[  OK  ]

Starting httpd:
[  OK  ]

[root@ns ~]#
/etc/rc.d/init.d/munin-node start

Starting Munin Node:
[  OK  ]

[root@ns ~]#
chkconfig munin-node on
[2] Access to 'http://(your server's hostname or IP address)/munin/' with web browser. Next, Click a link of hostname.
 
[3] You can see server's status.
 
[4] It's possible to monitor another server's status on a Host to install Munin on another Host in LAN.
(1) Install Munin on another Host "www" for example.
[root@www ~]#
yum --enablerepo=dag -y install munin*
 
# install from DAG


[root@www ~]#
vi /etc/munin/munin-node.conf


# line 29: specify hostname

host_name
www.server-linux.info


# add at the bottom: host you allow

allow
^192\.168\.0\.17$


[root@www ~]#
/etc/rc.d/init.d/munin-node start

Starting Munin Node:
[  OK  ]

[root@www ~]#
chkconfig munin-node on
(2) Return to a Host configured on the section [1].
[root@ns ~]#
vi /etc/munin/munin.conf


# add at the bottom

[www.server-linux.info]
# Monitored hostname


   address 192.168.0.18
# Monitored IP address


   use_node_name yes


[root@ns ~]#
/etc/rc.d/init.d/munin-node restart

Stopping Munin Node agents:
[  OK  ]

Starting Munin Node:
[  OK  ]
  Access to Munin's site after few minutes, then a new Host monitored has been just added like below.
 
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