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Upgrade from Centreon 20.04

This chapter describes how to upgrade your Centreon platform from version 20.04 to version 21.10.

If you want to migrate your Centreon server to CentOS / Oracle Linux / RHEL 8 you need to follow the migration procedure

To perform this procedure, your MariaDB version must be >= 10.3.22. If not, please follow before the MariaDB update chapter

Prerequisites

Perform a backup

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

  • Central server
  • Database server

Update the RPM signing key

For security reasons, the keys used to sign Centreon RPMs are rotated regularly. The last change occurred on October 14, 2021. When upgrading from an older version, you need to go through the key rotation procedure, to remove the old key and install the new one.

Update to the latest minor version

Update your platform to the latest available minor version of Centreon 20.04.

Upgrade the Centreon Central server

Since 21.04, Centreon uses MariaDB 10.5.

This upgrade process will only upgrade Centreon components first.

MariaDB will be upgraded afterwards.

Update the Centreon repository

Run the following commands:

yum install -y https://yum.centreon.com/standard/21.10/el7/stable/noarch/RPMS/centreon-release-21.10-2.el7.centos.noarch.rpm

Upgrade PHP

Centreon 21.10 uses PHP in version 8.0.

First, you need to install the remi repository:

yum install -y yum-utils
yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum install -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm

Then, you need to enable the php 8.0 repository

yum-config-manager --enable remi-php80

Upgrade the Centreon solution

Please, 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 21.10. Visit the support portal to get its address.

Stop the Centreon Broker process:

systemctl stop cbd

Delete existing retention files:

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

Clean yum cache:

yum clean all --enablerepo=*

Then upgrade all the components with the following command:

yum update centreon\*

Accept new GPG keys from the repositories as needed.

The PHP timezone should be set. Run the command:

echo "date.timezone = Europe/Paris" >> /etc/php.d/50-centreon.ini

Replace Europe/Paris by your time zone. You can find the list of supported time zones here.

Execute the following commands:

systemctl stop rh-php72-php-fpm
systemctl disable rh-php72-php-fpm
systemctl enable php-fpm
systemctl start php-fpm

Update your customized Apache configuration

This section only applies if you customized your Apache configuration. When upgrading your platform, the Apache configuration file is not upgraded automatically: the new configuration file brought by the rpm does not replace tha 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 /opt/rh/httpd24/root/etc/httpd/conf.d/10-centreon.conf /opt/rh/httpd24/root/etc/httpd/conf.d/10-centreon.conf.rpmnew
  • 10-centreon.conf (post upgrade): this file contains the custom configuration. It does not contain anthing new brought by version 21.10, e.g. the authentication string in the LocationMatch directive
  • 10-centreon.conf.rpmnew (post upgrade): this file is provided by the rpm; it contains the authentication string, but 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.

In particular, make sure your customized Apache configuration contains the following directive (with authentication).

<LocationMatch ^/centreon/(authentication|api/(latest|beta|v[0-9]+|v[0-9]+\.[0-9]+))/.*$>
    ProxyPassMatch fcgi://127.0.0.1:9042/usr/share/centreon/api/index.php/$1
</LocationMatch>

Finalizing the upgrade

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

systemctl reload httpd24-httpd

Then log on to the Centreon web interface to continue the upgrade process:

Click on Next:

image

Click on Next:

image

The release notes describe the main changes. Click on Next:

image

This process performs the various upgrades. Click on Next:

image

Your Centreon server is now up to date. Click on Finish to access the login page:

image

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

Post-upgrade actions

  1. Upgrade extensions. From Administration > Extensions > Manager, upgrade all extensions, starting with the following:

    • License Manager,
    • Plugin Packs Manager,
    • Auto Discovery.

    Then you can upgrade all other commercial extensions.

  2. Deploy the configuration.

  3. Restart Centreon processes:

    systemctl restart cbd centengine centreontrapd gorgoned

Upgrade the MariaDB server

The MariaDB components can now be upgraded.

Refer to the official MariaDB documentation to know more about this process:

https://mariadb.com/kb/en/upgrading-between-major-mariadb-versions/

Update the Centreon repository

This step is required ONLY when your environment features an architecture with a dedicated remote DBMS. If your environment features Centreon Central and MariaDB together on the same server, you SHOULD simply skip this step.

Run the following command on the dedicated DBMS server:

yum install -y https://yum.centreon.com/standard/21.10/el7/stable/noarch/RPMS/centreon-release-21.10-2.el7.centos.noarch.rpm

Upgrading MariaDB

You have to uninstall then reinstall MariaDB to upgrade between major versions (i.e. to switch from version 10.3 to version 10.5).

  1. Stop the mariadb service:

    systemctl stop mariadb

  2. Uninstall the current version:

    rpm --erase --nodeps --verbose MariaDB-server MariaDB-client MariaDB-shared MariaDB-compat MariaDB-common

  3. Install version 10.5:

    yum install MariaDB-server-10.5\* MariaDB-client-10.5\* MariaDB-shared-10.5\* MariaDB-compat-10.5\* MariaDB-common-10.5\*

  4. Start the mariadb service:

    systemctl start mariadb

  5. Launch the MariaDB upgrade process:

    mysql_upgrade

    If your database is password-protected, enter:

    mysql_upgrade -u <database_admin_user> -p

    Example: if your database_admin_user is root, enter:

    mysql_upgrade -u root -p

    Refer to the official documentation for more information or if errors occur during this last step.

Enable MariaDB on startup

Execute the following command:

systemctl enable mariadb

Upgrade the Remote Servers

This procedure is the same than to upgrade a Centreon Central server.

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

Upgrade the Pollers

Update the Centreon repository

Run the following command:

yum install -y https://yum.centreon.com/standard/21.10/el7/stable/noarch/RPMS/centreon-release-21.10-2.el7.centos.noarch.rpm

Upgrade the Centreon solution

Clean yum cache:

yum clean all --enablerepo=*

Upgrade all the components with the following command:

yum update centreon\*

Accept new GPG keys from the repositories as needed.

Start and enable gorgoned:

systemctl start gorgoned
systemctl enable gorgoned

Secure your platform

Don't forget to secure your Centreon platform following our recommendations

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