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Version: 22.10

Updating Centreon-HA platform

This procedure is intended to be used to perform minor updates of Centreon when Engine/Broker compatibility between the old version and the new version is assured. No service downtime is necessary in this case; only a short outage of the Web UI login screen.

Suspend cluster resource management

In order to avoid a failover of the cluster during the update, it is necessary to unmanage all Centreon resources, as well as MariaDB.

pcs property set maintenance-mode=true

Update process from the WUI

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

Centreon-Web update

Update your cluster by running the following command on each central node:

Clean the cache :

yum clean all --enablerepo=*

Update all components:

yum update centreon\*

Once the package updates have been completed on both centrals, all that remains is to apply the update via the web interface only on the master exchange by closing the current session or refreshing the login page or by API as shown here.

On the "slave" central node, you must move the "install" directory and regenerate the Symfony cache to avoid displaying the update interface again following a switchover.

mv /usr/share/centreon/www/install /var/lib/centreon/installs/install-update-`date +%Y%m%d`
sudo -u apache /usr/share/centreon/bin/console cache:clear

Removing cron jobs

The RPM upgrade puts the cron job back in place. Remove them on the two central nodes to avoid concurrent executions:

rm -f /etc/cron.d/centreon
rm -f /etc/cron.d/centstorage
rm -f /etc/cron.d/centreon-auto-disco
systemctl restart crond

Updating Centreon extensions

The Centreon extensions are also updated via the WUI, from the "Administration > Extensions > Manager" menu, by clicking the "Update all" button.

Updating the Monitoring Connectors

In order to maintain compatibility between the Monitoring Connectors and the installed plugins (that have just been updated on the central server), the Monitoring Connectors must also be updated in the WUI from the Configuration > Monitoring Connector Manager menu.

Exporting Engine/Broker configuration

Generate and export new Engine/Broker configuration files for all pollers (central included) in "Configuration -> Pollers" with these options checked:

  • Generate Configuration Files
  • Run monitoring engine debug (-v)
  • Move Export Files

Then restart them one at a time from the same menu and make sure to select the "Restart" method, not "Reload", if the centreon-engine and/or centreon-broker packages have been updated.

In addition, the cbd-sql service must be restarted on the central master server:

service cbd-sql restart

The cbd service must also be restarted on Centreon Remote Servers:

service cbd restart

Resuming cluster resource management

Now that the update is finished, the resources can be managed again:

pcs property set maintenance-mode=false
pcs resource cleanup ms_mysql

Verifying platform stability

You should now check that everything works fine:

  • Access to the web UI menus.
  • Poller configuration generation + reload and restart method.
  • Schedule an immediate check (Central + Pollers) and acknowledge, downtime etc.
  • Move resources or reboot the master server and check again that everything is fine.

Updating the pollers

Pollers can then be updated by following the procedure indicated here.