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Version: 22.10

Using packages

Centreon provides RPM packages for its products through the Centreon Open Source version available free of charge in our repository.

These packages can be installed on CentOS 7, on Alma/RHEL/Oracle Linux 8 and on Debian 11.

You must run the installation procedure as a privileged user.


After installing your server, update your operating system using the following command:

dnf update

Additional configuration

If you intend to use Centreon in French, Spanish, Portuguese or German, install the corresponding packages:

dnf install glibc-langpack-fr
dnf install glibc-langpack-es
dnf install glibc-langpack-pt
dnf install glibc-langpack-de

Use the following command to check which languages are installed on your system:

locale -a

Accept all GPG keys and reboot your server if a kernel update is proposed.

Step 1: Pre-installation

Disable SELinux

During installation, SELinux should be disabled. To do this, edit the file /etc/selinux/config and replace enforcing by disabled. You can also run the following command:

sed -i s/^SELINUX=.*$/SELINUX=disabled/ /etc/selinux/config

Reboot your operating system to apply the change.


After system startup, perform a quick check of the SELinux status:


You should have this result:


Note that this deactivation should be temporary. To enable SELinux again, edit the /etc/selinux/config file and change the value with the following options:

  • SELINUX=enforcing to make SELinux security policy enforced.
  • SELINUX=permissive to make SELinux print warnings instead of enforce security policy.

Configure or disable firewall

If your firewall is active, add firewall rules. You can also disable the firewall during installation by running the following commands:

systemctl stop firewalld
systemctl disable firewalld

Server name

If you want, you can change the server's name using the following command:

hostnamectl set-hostname new-server-name

Replace new-server-name by the name you want. Example:

hostnamectl set-hostname poller1

Install the repositories

Redhat PowerTools repository

To install Centreon you will need to enable the official PowerTools repository supported by Redhat.

Enable the PowerTools repository using these commands:

dnf -y install dnf-plugins-core epel-release
dnf config-manager --set-enabled powertools

Centreon repository

To install Centreon software, you should first install the Centreon repository.

Install the Centreon repository using this command:

dnf install -y dnf-plugins-core
dnf config-manager --add-repo

Step 2: Installation

To install the monitoring engine, run the command:

dnf install -y centreon-poller

To make services start automatically during system bootup, run the following command:

systemctl enable centreon centengine centreontrapd snmptrapd gorgoned

Passive monitoring services can be started:

systemctl start centreontrapd snmptrapd gorgoned

Restart Centreon Engine:

systemctl restart centengine

Step 3: Register the server

To turn the server into a poller and to register it to the Central server or to a Remote server, execute the following command on the future poller:

/usr/share/centreon/bin/ -u <API_ACCOUNT> \
-t poller -h <IP_TARGET_NODE> -n <POLLER_NAME>


/usr/share/centreon/bin/ -u admin -t poller -h -n poller-1

Replace <IP_TARGET_NODE> by the IP of the central server or remote server that you want to link the poller to (IP as seen by the poller)

The <API_ACCOUNT> must have access to the configuration API. You can use the default admin account.

If you need to change the HTTP method or the port, you can use the following format for the -h option: HTTPS://<IP_TARGET_NODE>:PORT

Then follow instructions by

  1. Entering your password:

    please enter the password of
  2. Select the IP adress if multiple network interfaces exist:

    Which IP do you want to use as CURRENT NODE IP ?
  3. Then validate the information:

    Summary of the informations that will be send:

    Api Connection:
    username: admin
    password: ******
    target server:

    Pending Registration Server:
    name: poller-1
    type: poller

    Do you want to register this server with those information ? (y/n)y

You will receive the validation of the Centreon central or the Remote Server server:

2020-10-16T17:19:37+02:00 [INFO]: The CURRENT NODE 'poller': 'poller-1@' linked to TARGET NODE: '' has been added

Main errors messages

2020-10-20T10:23:15+02:00 [ERROR]: Invalid credentials

Your credentials are incorrect for the <API_ACCOUNT>.

2020-10-20T10:24:59+02:00 [ERROR]: Access Denied.

The <API_ACCOUNT> doesn't have access to configuration API.

Failed connect to; Connection refused

Unable to access to the API. Please check <IP_TARGET_NODE>, scheme and port.

2020-10-20T10:39:30+02:00 [ERROR]: Can’t connect to the API using:

The access url is not complete or invalide. Use the --root option to define the API URL Path. For example: --root monitoring.

2020-10-20T10:42:23+02:00 [ERROR]: No route found for “POST /centreon/api/latest/platform/topology”

Your Centreon target version is invalid. It should be greater or equal to 22.10.

Step 4: Add the Poller to configuration

Go to the Add a Poller to configuration.

Step 5: Secure your platform

Do not forget to secure your Centreon platform following our recommendations.