Source-backed version compatibility
RKE2 Windows Server version compatibility. Windows Server 2022 workers are supported in Linux control-plane clusters and require Calico or Flannel CNI.
Quick answer
Supported and tested versions have compatibility evidence. Recommended and bundled versions describe upstream choices without establishing compatibility. Versions outside the documented coverage are unknown, not necessarily incompatible.
Supported Windows Server versions
Windows Server 2022 workers are supported in Linux control-plane clusters and require Calico or Flannel CNI.
high confidence · verified 2026-10-08 · supported Windows worker operating system
Supported Windows Server versions
Windows Server 2022 workers are supported in Linux control-plane clusters and require Calico or Flannel CNI.
high confidence · verified 2026-10-08 · supported Windows worker operating system
Supported Windows Server versions
Windows Server 2019 LTSC and 2022 workers are supported in Linux control-plane clusters and require Calico or Flannel CNI.
high confidence · verified 2026-10-08 · supported Windows worker operating system
Supported Windows Server versions
Windows Server 2019 LTSC and 2022 workers are supported in Linux control-plane clusters and require Calico or Flannel CNI.
high confidence · verified 2026-10-08 · supported Windows worker operating system
Primary evidence
Every constraint above is backed by upstream documentation, tagged source, release notes, or another project-owned primary source.
compatibility.fyi