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
Documented Windows Server versions
Windows Server 2022 workers are supported in Linux control-plane clusters and require Calico or Flannel CNI.
high confidence · verified 2026-07-10 · supported Windows worker operating system
Documented 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 2026-07-10 · supported Windows worker operating system
Documented 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 2026-07-10 · supported Windows worker operating system
Primary evidence
Every range above is backed by upstream documentation, tagged source, release notes, or another project-owned primary source.
compatibility.fyi