When deploying virtual machines on OpenShift Virtualization, not all guest operating systems offer the same level of support.
👉 This directly impacts your migration strategy, operational reliability, and support coverage.

That’s why Red Hat classifies guest OSs into four categories 👇

• 🟢 Certified – fully tested and certified by Red Hat (full support).

• 🟡 Commercial Vendor Supported – Red Hat covers the hypervisor, the vendor covers the OS.

• 🟠 Community Supported – Red Hat covers the hypervisor only.

• ⚪ Known to work – works in the field, but no official support.

Certified Operating Systems

These operating systems are fully certified and supported by Red Hat.
If issues arise, Red Hat will provide support and coordinate with the OS vendor if needed.

🧪 Green = tested and verified.
🔵 Blue = successfully migrated and running on the target cluster.

🔶Windows Feature Support

🟡 Commercial Vendor Supported Operating Systems

In these cases, Red Hat supports the hypervisor, while the OS vendor provides support for the guest OS.

🟠 Community Supported Operating Systems

For these systems, Red Hat only supports the hypervisor layer.
👉 Troubleshooting and patches for the guest OS rely on community channels.

⚪ Known to Work Operating Systems

These operating systems have been observed to work in the field, but there’s no official support from Red Hat or a vendor.

 Note: Red Hat Enterprise Linux 6 is supported for migration only, not for extended production use.

 Migration Recommendations (MTV)

• Prefer Certified and Vendor Supported OSs whenever possible.

• Run pilots for Community or Known to Work workloads before production migration.

• Check EOL and support policies for each OS.

• Leverage Windows features such as SecureBoot, vTPM, and VBS for modern workloads.