Open Enterprise Server runs as a VM guest on any virtual machine host server that is certified for running SUSE Linux Enterprise Server 12 SP5 (SLES 12 SP5) as a paravirtualized guest. Because Xen and KVM are distributed with SLES, they are mentioned more particularly in the OES documentation.
For a list of the VM host platforms that are certified for SLES, see “Supported VM Host Servers for SLES VM Guests” in the SLES Virtualization Guide.
For information about installing and running OES services on virtual machines, see OES 2018 SP3: Installation Guide.