7 Disaster Recovery

Oracle Linux Virtualization Manager supports active-active and active-passive disaster recovery solutions to ensure that environments can recover when a site outage occurs. Both solutions support two sites and require replicated storage.

Active-Active Disaster Recovery

Active-active disaster recovery uses a stretch cluster configuration. This means that there is a single Oracle Linux Virtualization Manager environment with a cluster that contains hosts capable of running the required virtual machines in the primary and secondary site. The virtual machines in the primary site automatically migrate to hosts in the secondary site if an outage occurs. However, the environment must meet latency and networking requirements.

Active-Passive Disaster Recovery

Active-passive disaster recovery is a site-to-site failover solution. Two separate Oracle Linux Virtualization Manager environments are configured: the active primary environment and the passive secondary (backup) environment. With active-passive disaster recovery, you must manually execute failover and failback (when needed) both of which are performed using Ansible.

Important:

When using clustering applications, such as RAC, Pacemaker/Corosync, set virtual machines to Kill for Resume Behaviour (which you can find in the edit VM dialog under High Availability). Otherwise, the clustering applications might try to fence a suspended or paused virtual machine.