Centreon can link with multiple Nagios.
They speak throw NDOutils.
The following configuration shows how to configure Nagios and NDOutils to communicate with a local Centreon.

Nagios

Prerequiste

I assume that you have a Centos installation.

Installation

You can copy/paste this script and use it to configure automatically your server.

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That’s all 🙂

NDOutils

Install NDOutils:

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Link with centreon

In /etc/nagios/ndomod.cfg, check you have theses parameters

instance_name=Central
output_type=tcpsocket
output=localhost
tcp_port=5668
output_buffer_items=5000

And check you have the same values in Centreon : Configuration -> Centreon -> ndomod.cfg

In /etc/nagios/ndo2db.cfg, check you have theses parameters

ndo2db_user=nagios
ndo2db_group=nagios
 
socket_type=tcp
socket_name=/var/run/ndo.sock
tcp_port=5668
 
db_servertype=mysql
db_host=localhost
db_name=centreon_status
db_port=3306
db_prefix=nagios_
db_user=centreon
db_pass=centreon

And check you have the same values in Centreon : Configuration -> Centreon -> ndo2db.cfg

In /etc/nagios/nagios.cfg, configure blockers:

event_broker_options=-1
broker_module=/usr/lib64/nagios/brokers/ndomod.so config_file=/etc/nagios/ndomod.cfg

And check you have the same values in Centreon : Configuration -> Monitoring Engines -> main.cfg (tab Data)

Now restart services:

/etc/init.d/ndo2db start
/etc/init.d/nagios restart

Troubleshooting

ndomod: Still unable to reconnect to data sink

ndo2db process do not manage to access to ndo2db.cgf file. Execute the following command:

chown apache:apache /etc/nagios/ -R