Perform the following steps before updating a server:
- Download the current version of IGEL Universal Management Suite from the IGEL Download Server and distribute the installer file to all systems with UMS components (UMS Server, UMS Load Balancer, UMS Consoles).
- In the UMS Console, call up the list of UMS Servers and Load Balancers in the HA network under UMS Administration > UMS Network and check whether the listed components really exist in the network. Delete orphaned entries before starting the process for updating the components.
Create a backup of your database before starting the update installation. Use the backup procedures recommended by the DBMS manufacturer. See also Creating a Backup.
WarningIt is not possible to install a UMS version which is older than the current one. If you want to change to an older version, you will need to install a separate HA network and restore a database backup of the corresponding schema. This is also one of the reasons why you should back up the running system before updating the UMS HA network.
Verify that the time on all servers is synchronized.
To avoid problems with your HA installation, make sure that the time on the servers of the HA network does not differ by more than one minute. After each manual time reset, the HA services on the relevant server must be restarted.