Version: 24.04

Upgrade from Centreon 22.04

This chapter describes how to upgrade your Centreon platform from version 22.04 to version 24.04.

When you upgrade your central server, make sure you also upgrade all your remote servers and your pollers. All servers in your architecture must have the same version of Centreon. In addition, all servers must use the same version of the BBDO protocol.

If you want to migrate your Centreon platform to another server/OS, follow the migration procedure.

Prerequisites

Perform a backup

Be sure that you have fully backed up your environment for the following servers:

Central server
Database server

Upgrade the Centreon Central server

When you run a command, check its output. If you get an error message, stop the procedure and fix the issue.

Install the new repositories

Alma / RHEL / Oracle Linux 8
Debian 11

Update your Centreon 22.04 to the latest minor version.
Remove the centreon-22.04.repo file:
```
rm /etc/yum.repos.d/centreon-22.04.repo
```
Install the new repository:

dnf install -y dnf-plugins-core
dnf config-manager --add-repo https://packages.centreon.com/rpm-standard/24.04/el8/centreon-24.04.repo

Update your Centreon 22.04 to the latest minor version.
Run the following commands:

echo "deb https://packages.centreon.com/apt-standard-24.04-stable/ $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/centreon.list
echo "deb https://packages.centreon.com/apt-plugins-stable/ $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/centreon-plugins.list

Then import the repository key:

wget -O- https://apt-key.centreon.com | gpg --dearmor | tee /etc/apt/trusted.gpg.d/centreon.gpg > /dev/null 2>&1
apt update

If you have an offline license, also remove the old Monitoring Connectors repository, then install the new one.
If you have a Business edition, do the same with the Business repository.
You can find the address of these repositories on the support portal.

Upgrade PHP

Centreon 24.04 uses PHP in version 8.1.

RHEL 8
Alma / Oracle Linux 8
Debian 11

You need to change the PHP stream from version 8.0 to 8.1 by executing the following commands and answering y to confirm:

dnf module reset php

dnf module install php:remi-8.1

You need to change the PHP stream from version 8.0 to 8.1 by executing the following commands and answering y to confirm:

dnf module reset php

dnf module install php:remi-8.1

systemctl stop php8.0-fpm

Upgrade the Centreon solution

Make sure all users are logged out from the Centreon web interface before starting the upgrade procedure.

If you have installed Business extensions, update the Business repository to version 24.04. Visit the support portal to get its address.

If your OS is Debian 11 and you have a customized Apache configuration, perform a backup of your configuration file (/etc/apache2/sites-available/centreon.conf).

Stop the Centreon Broker process:

systemctl stop cbd

Delete existing retention files:

rm /var/lib/centreon-broker/* -f

Clean the cache:

Alma / RHEL / Oracle Linux 8
Debian 11

dnf clean all --enablerepo=*

apt clean
apt update

Then upgrade all the components with the following command:

Alma / RHEL / Oracle Linux 8
Debian 11

dnf update centreon\* php-pecl-gnupg

apt install --only-upgrade centreon

Accept new GPG keys from the repositories as needed.

Update your customized Apache configuration

This section only applies if you customized your Apache configuration.

Alma / RHEL / Oracle Linux 8
Debian 11

When you upgrade your platform, the Apache configuration file is not upgraded automatically. The new configuration file brought by the rpm does not replace the old file. You must copy the changes manually to your customized configuration file.

Run a diff between the old and the new Apache configuration files:

diff -u /etc/httpd/conf.d/10-centreon.conf /etc/httpd/conf.d/10-centreon.conf.rpmnew

10-centreon.conf (post upgrade): this file contains the custom configuration. It does not contain anything new brought by the upgrade.
10-centreon.conf.rpmnew (post upgrade): this file is provided by the rpm; it does not contain any custom configuration.

For each difference between the files, assess whether you should copy it from 10-centreon.conf.rpmnew to 10-centreon.conf.

Check that Apache is configured properly by running the following command:

apachectl configtest

The expected result is the following:

Syntax OK

Restart the Apache and PHP processes to take the new configuration into account:

systemctl restart php-fpm httpd

Then check its status:

systemctl status httpd

If everything is ok, you should have:

● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
  Drop-In: /usr/lib/systemd/system/httpd.service.d
           └─php-fpm.conf
   Active: active (running) since Tue 2020-10-27 12:49:42 GMT; 2h 35min ago
     Docs: man:httpd.service(8)
 Main PID: 1483 (httpd)
   Status: "Total requests: 446; Idle/Busy workers 100/0;Requests/sec: 0.0479; Bytes served/sec: 443 B/sec"
    Tasks: 278 (limit: 5032)
   Memory: 39.6M
   CGroup: /system.slice/httpd.service
           ├─1483 /usr/sbin/httpd -DFOREGROUND
           ├─1484 /usr/sbin/httpd -DFOREGROUND
           ├─1485 /usr/sbin/httpd -DFOREGROUND
           ├─1486 /usr/sbin/httpd -DFOREGROUND
           ├─1487 /usr/sbin/httpd -DFOREGROUND
           └─1887 /usr/sbin/httpd -DFOREGROUND

Use the backup file you created in the previous step to copy your customizations to the file /etc/apache2/sites-available/centreon.conf.

Check that Apache is configured properly by running the following command:

apache2ctl configtest

The expected result is the following:

Syntax OK

Restart the Apache and PHP processes to take the new configuration into account:

systemctl restart php8.0-fpm apache2

Then check its status:

systemctl status apache2

If everything is ok, you should have:

● apache2.service - The Apache HTTP Server
    Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor pres>
     Active: active (running) since Tue 2022-08-09 05:01:36 UTC; 3h 56min ago
       Docs: https://httpd.apache.org/docs/2.4/
   Main PID: 518 (apache2)
      Tasks: 11 (limit: 2356)
     Memory: 18.1M
        CPU: 1.491s
     CGroup: /system.slice/apache2.service
             ├─ 518 /usr/sbin/apache2 -k start
             ├─1252 /usr/sbin/apache2 -k start
             ├─1254 /usr/sbin/apache2 -k start
             ├─1472 /usr/sbin/apache2 -k start
             ├─3857 /usr/sbin/apache2 -k start
             ├─3858 /usr/sbin/apache2 -k start
             ├─3859 /usr/sbin/apache2 -k start
             ├─3860 /usr/sbin/apache2 -k start
             ├─3876 /usr/sbin/apache2 -k start
             ├─6261 /usr/sbin/apache2 -k start
             └─6509 /usr/sbin/apache2 -k start

Customized Apache configuration: enable text compression

In order to improve page loading speed, you can activate text compression on the Apache server. It requires the brotli package to work. This is optional, but it provides a better user experience.

Add the following code to your Apache configuration file, in both the <VirtualHost *:80> and <VirtualHost *:443> elements:

<IfModule mod_brotli.c>
    AddOutputFilterByType BROTLI_COMPRESS text/html text/plain text/xml text/css text/javascript application/javascript application/json
</IfModule>
AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript application/json

Finalizing the upgrade

Before starting the web upgrade process, reload the Apache server with the following command:

Alma / RHEL / Oracle Linux 8
Debian 11

systemctl reload php-fpm httpd

apt autoremove
systemctl daemon-reload
systemctl stop php8.0-fpm.service
systemctl enable php8.1-fpm
systemctl start php8.1-fpm
systemctl restart apache2

Then you need to finalize the upgrade process:

Using the wizard
Using a dedicated API endpoint

Log on to the Centreon web interface to continue the update process. Click Next:
Click Next:
The release notes describe the main changes. Click Next:
This process performs the various upgrades. Click Next:
Your Centreon server is now up to date. Click Finish to access the login page:

If the Centreon BAM module is installed, refer to the update procedure.
Deploy the central's configuration from the Centreon web UI by following this procedure.

Log on to the central server through your terminal to continue the update process.
You need an authentication token to reach the API endpoint. Perform the following procedure to get a token.
In our case, we have the configuration described below (you need to adapt the procedure to your configuration).
- address: 10.25.XX.XX
- port: 80
- version: 24.04
- login: Admin
- password: xxxxx

Enter the following request:

curl --location --request POST '10.25.XX.XX:80/centreon/api/v24.04/login' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--data '{
  "security": {
    "credentials": {
      "login": "Admin",
      "password": "xxxxx"
    }
  }
}'

This is how the result should look:

{"contact":{"id":1,"name":"Admin Centreon","alias":"admin","email":"admin@localhost","is_admin":true},"security":{"token":"hwwE7w/ukiiMce2lwhNi2mcFxLNYPhB9bYSKVP3xeTRUeN8FuGQms3RhpLreDX/S"}}

Retrieve the token number to use it in the next request.

Then enter this request:

curl --location --request PATCH 'http://10.25.XX.XX:80/centreon/api/latest/platform/updates' \
--header 'X-AUTH-TOKEN: hwwE7w/ukiiMce2lwhNi2mcFxLNYPhB9bYSKVP3xeTRUeN8FuGQms3RhpLreDX/S' \
--header 'Content-Type: application/json' \
--data '{
    "components": [
        {
            "name": "centreon-web"
        }
    ]
}'

This request does not return any result. To check if the update has been successfully applied, read the version number displayed on the Centreon web interface login page.

Finally, restart Broker, Engine and Gorgone on the central server by running this command:

systemctl restart cbd centengine gorgoned

Update the permissions on the centreon-broker configuration files.

Alma / RHEL / Oracle Linux 8
Debian 11

usermod -a -G centreon-broker apache
usermod -a -G apache centreon-broker

usermod -a -G centreon-broker www-data
usermod -a -G www-data centreon-broker

As the interface layout has changed in version 22.10, you need to clear your browser cache to display the new theme.

If the Centreon BAM module is installed, refer to the upgrade procedure.

Post-upgrade actions

Upgrade extensions. From Administration > Extensions > Manager, upgrade all extensions, starting with the following:
- License Manager,
- Monitoring Connector Manager,
- Auto Discovery.
  Then you can upgrade all other commercial extensions.
Deploy the configuration.

Restart the processes:

systemctl restart cbd centengine centreontrapd gorgoned

Upgrade MariaDB

Follow this procedure to upgrade MariaDB to version 10.11.

Upgrade the Remote Servers

This procedure is the same as for upgrading a Centreon Central server.

At the end of the update, the configuration should be deployed from the Central server.

Upgrade the Pollers

Update the Centreon repository

Run the following command:

Alma / RHEL / Oracle Linux 8
Debian 11

dnf install -y dnf-plugins-core
dnf config-manager --add-repo https://packages.centreon.com/rpm-standard/24.04/el8/centreon-24.04.repo

echo "deb https://packages.centreon.com/apt-standard-24.04-stable/ $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/centreon.list
apt update

Upgrade the Centreon solution

Clean the cache:

Alma / RHEL / Oracle Linux 8
Debian 11

dnf clean all --enablerepo=*

apt clean
apt update

Then upgrade all the components with the following command:

Alma / RHEL / Oracle Linux 8
Debian 11

dnf update centreon\*

apt install --only-upgrade centreon-poller

Accept new GPG keys from the repositories as needed.

Restart centreon:

systemctl restart centreon

Prerequisites​

Perform a backup​

Upgrade the Centreon Central server​

Install the new repositories​

Upgrade PHP​

Upgrade the Centreon solution​

Update your customized Apache configuration​

Customized Apache configuration: enable text compression​

Finalizing the upgrade​

Post-upgrade actions​

Upgrade MariaDB​

Upgrade the Remote Servers​

Upgrade the Pollers​

Update the Centreon repository​

Upgrade the Centreon solution​

Prerequisites

Perform a backup

Upgrade the Centreon Central server

Install the new repositories

Upgrade PHP

Upgrade the Centreon solution

Update your customized Apache configuration

Customized Apache configuration: enable text compression

Finalizing the upgrade

Post-upgrade actions

Upgrade MariaDB

Upgrade the Remote Servers

Upgrade the Pollers

Update the Centreon repository

Upgrade the Centreon solution