Prerequisites

The Centreon web interface is compatible with the following list of web browser:

• Chrome (latest version)

• Firefox (latest version)

• Internet Explorer IE 11 (latest version)

• Safari (latest version)

Your screen resolution must be at least 1280 x 768.

Softwares

Operating System

If you use Centreon ISO v3.x you can choose between operating system CentOS v6 or CentOS v7.

If you prefer to use Red Hat OS you must install it in v6 or v7 version and use rpms from repository.

Else you can use another GNU/Linux operating system but installation will be more complex and realized using software sources.

Note

Only 64-bit operating systems (x86_64) are supported.

DBMS

Centreon advises you to use MariaDB instead of MySQL.

Software	Version
MariaDB	>= 10.1.29
MySQL	>= 5.6.16

Dependent software

The following table describes the dependent software:

Software	Version
Apache	2.2 & 2.4
GnuTLS	>= 2.0
Net-SNMP	5.5
openssl	>= 1.0.1e
PHP	>= 5.3.0 & < 5.5
Qt	>= 4.7.4
RRDtools	1.4.7
zlib	1.2.3

Select type of architecture

The table below gives the prerequisites for the installation of CES 3.x:

Number of Services	Estimated number of hosts	Number of pollers	Central	Poller
< 500	50	1 central	1 vCPU / 1 GB
500 - 2000	50 - 200	1 central	2 vCPU / 2 GB
2000 - 10000	200 - 1000	1 central + 1 poller	4 vCPU / 4 GB	1 vCPU / 2 GB
10000 - 20000	1000 - 2000	1 central + 1 poller	4 vCPU / 8 GB	2 vCPU / 2 GB
20000 - 50000	2000 - 5000	1 central + 2 pollers	4 vCPU / 8 GB	4 vCPU / 2 GB
50000 - 100000	5000 - 10000	1 central + 3 pollers	4 vCPU / 8 GB	4 vCPU / 2 GB

Note

vCPU must have a frequency around 3 GHz

Define space disk

The space used for store collected and performance data depends on several criteria:

• Frequency of controls

• Number of controls

• Retention time

The following table provides an idea of the disk space needed for your platform with:

• Data are collected every 5 minutes

• The retention period is 6 month

• Each performance graph have 2 curves

Number of Services	/var/lib/mysql	/var/lib/centreon
< 500	10 GB	2.5 GB
500 - 2000	42 GB	10 GB
2000 - 10000	210 GB	50 GB
10000 - 20000	420 GB	100 GB
20000 - 50000	1.1 TB	250 GB
50000 - 100000	2,3 TB	1 TB

Define files system

Note

Your system must use LVM to manage files system.

Centreon server

Files system description:

File system	Size
swap	1 to 1.5 total size of RAM space
/	at least 20 GB
/var/log	at least 10 GB
/var/lib/centreon	define in previous chapter
/var/lib/centreon-broker	at least 5 GB
/var/cache/centreon/backup	at least 10 GB (please daily export the backups and delete the exported data)

MariaDB DBMS

Note

Al least 1GB of non allocated free space must be available on the volume group where /var/lib/mysql is located when you want to use snapshot LVM as backup method.

Files system description:

File system	Size
swap	1 to 1.5 total size of RAM space
/	at least 20 GB
/var/log	at least 10 GB
/var/lib/mysql	define in previous chapter
/var/cache/centreon/backup	at least 10 Go (please daily export the backups and delete the exported data)

Monitoring poller

Files system description:

File system	Size
swap	1 to 1.5 total size of RAM space
/	at least 20 GB
/var/log	at least 10 GB
/var/lib/centreon-broker	at least 5 GB
/var/cache/centreon/backup	at least 5 Go (please daily export the backups and delete the exported data)

Users and groups

Note

This information are available for Red Hat / CentOS system. Name of users, groups and services can change regarding GNU/Linux distribution.

Description of software and linked users:

Software	Service	User	Comment
Apache	httpd	apache	automatic start
MySQL (MariaDB)	mysqld (mysql)	mysql	automatic start
Centreon	centcore	centreon	automatic start
Centreon	centreontrapd	centreon	automatic start
Centreon Broker	cbwd	centreon-broker	automatic start
Centreon Broker	cbd	centreon-broker	automatic start
Centreon Engine	centengine	centreon-engine	automatic start

Description of optional software and linked users:

Software	Service	User	Comment
Centreon VMware	centreon_vmware	centreon	not installed by default
RRDtool	rrdcached	rrdcached	not enabled and not defined in Centreon by default

Description of groups and linked users:

Group	Users
apache	nagios,centreon
centreon	centreon-engine,centreon-broker,apache
centreon-broker	centreon,nagios,centreon-engine,apache
centreon-engine	centreon-broker,apache,nagios,centreon

Description of users, umask and home directory:

User	umask	home
root	0022	/root
apache	0022	/var/www
centreon	0002	/var/spool/centreon
centreon-broker	0002	/var/lib/centreon-broker
centreon-engine	0002	/var/lib/centreon-engine
mysql	0002	/var/lib/mysql