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Version: 21.04

Upgrade from Centreon 20.10

This chapter describes how to upgrade your Centreon platform from version 20.10 to version 21.04.

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

Warning, following the correction of a problem relating to the database schema, it will be necessary to stop the insertion of the data collected into the database during the update. These will be stored in temporary files and then installed at the end of the update process.

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.

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/21.04/el7/stable/noarch/RPMS/centreon-release-21.04-6.el7.centos.noarch.rpm

Upgrade PHP​

Centreon 21.04 use PHP in version 7.3.

You need to change the PHP stream from version 7.2 to 7.3 by executing the following commands and answering y to confirm:

dnf module reset php
dnf module install php:7.3

Upgrade the Centreon solution​

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.

Execute the following commands:

systemctl enable php-fpm
systemctl restart php-fpm

Finalizing the upgrade​

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

systemctl reload 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. Deploy the configuration.

  2. Restart the processes:

    systemctl restart cbd centengine centreontrapd gorgoned
  3. 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.

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/21.04/el7/stable/noarch/RPMS/centreon-release-21.04-6.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.

Upgrade the Pollers​

Update the Centreon repository​

Run the following command:

yum install -y https://yum.centreon.com/standard/21.04/el7/stable/noarch/RPMS/centreon-release-21.04-6.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

Restart centengine:

systemctl restart centengine