Configure Distributed Monitoring IN Fully Automated Nagios

This feature is available since FAN 2.1. A distributed architecture is based on  :

• 1 central monitoring servers
• 1 database server
• and several pollers monitors.

The central server consolidates all monitoring data and offers a user interface which also offers the possibility to monitor and manage the central server and the poller monitors.

The poller monitors send their check results to the database server. This type of setup permits distribution of checks – for any type of reason f.e. remote locations, DMZ, etc.

You need install minimun 2 FAN servers :

• fan-database
• fan-central, it may also be considered as fan-poller

But, we recommend to install 3 FAN servers :

• fan-database
• fan-central
• fan-poller

Fully Automated Nagios Distributed Monitoring Configuration

Boot your image from CD or Boot from ISO Image (Download Fully Automated Nagios ISO)

To install FAN central

select : fan-central

To install FAN poller

select: fan-poller

To install FAN database

select: fan-database

Configuration

Permit root login by ssh

We need to temporarily allow root to login via ssh on fan poller and database.

Connect to fan-poller and modify this file /etc/ssh/sshd_config

PermitRootLogin yes

Restart sshd service

# service sshd restart

Make the same operation on fan-database.

Configure FAN central

Connect to fan-central and run system-config-distributed-monitoring script

First configure acces fan-central to fan-database and answer questions

# system-config-distributed-monitoring
Choose an action to do (addpoller or configdatabase):configdatabase
Give me the IP address of database server :192.168.56.5
Give me the root password of database server :
What's the IP address of fan-central (default 192.168.56.3) :[enter] <== Modify if necessary
[INFO] You must enable root user to login by ssh to database server "192.168.56.5" by ssh.
If this is not the case, edit /etc/ssh/sshd_config on database server and add "PermitRootLogin yes"
Do you want continu ? [y/n], default to [n]:y
Stopping ndo2db: done.
Starting ndo2db: done.
Stopping Centcore
Waiting for centcore to exit . done.
Starting Centcore
Stopping centreon data collector Collector : centstorage
Waiting for centstorage to exit . done.
Starting centstorage Collector : centstorage

Check Centreon on fan-central :

• Connect to http://fan-central/centreon/

• and try to login to nagiosadmin/nagiosadmin

Second add poller fan-poller into fan-central

# system-config-distributed-monitoring Choose an action to do (addpoller or configdatabase):addpoller
Give me the new Poller Name ? (no space) :fan-poller <== Add a description
Give me the IP address of "fan-poller" :192.168.56.4 <== Add the ip address
Give me the root password of "fan-poller" :
What's the IP address of fan-central (default 192.168.56.3) :[enter] <== Modify if necessary
[INFO] You must enable root user to login by ssh to "fan-poller" by ssh.
If this is not the case, edit /etc/ssh/sshd_config on "fan-poller" and add "PermitRootLogin yes"
Do you want continu ? [y/n], default to [n]:y
Check if nagios user has a ssh key
Nagios user has a ssh key
Create a random password for nagios user on "fan-poller"
Copy ssh key to poller "fan-poller"
Add configuration poller in to centreon database
Stopping Centcore
Waiting for centcore to exit . done.
Starting Centcore

Disable root login by ssh

Connect to fan-poller and modify this file /etc/ssh/sshd_config

PermitRootLogin no

Restart sshd service

# service sshd restart

Make the same operation on fan-database.

Add a new poller

If you want to add a new poller :

• Install a FAN poller
• Permit root login by ssh
• Run configure_distributed_monitoring script

# system-config-distributed-monitoring addpoller

• Disable root login

On centreon 2.4.X, you may need to configure resources. Go to Configuration>Monitoring Engines>resources

Modify resources and link it on your poller.

Troubleshooting

Delete a poller

If you want to delete a poller,

Go to Centreon webui.

• Delete Administration>Configuration>Nagios>NagiosCFG
• Delete Administration>Configuration>Centreon>Ndomod
• Delete Administration>Configuration>Centreon>Pollers

Go to Nagvis and delete the backend for the poller.

Manage snmp trap by on poller

Note: This feature is NOT available and stable into Centreon 2.1.13.