Source-backed version compatibility
Flux Kubernetes version compatibility. Flux v2.9 release notes require Kubernetes 1.34.1 or later on the 1.34 line and support Kubernetes 1.35 and 1.36 from their initial patch releases.
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 Kubernetes versions
Flux v2.9 release notes require Kubernetes 1.34.1 or later on the 1.34 line and support Kubernetes 1.35 and 1.36 from their initial patch releases.
high confidence · verified 2026-10-08 · runtime
Supported Kubernetes versions
Flux v2.8 release notes list Kubernetes 1.33 through 1.35, with Kubernetes 1.34 support starting at 1.34.1.
high confidence · verified 2026-10-08 · runtime
Supported Kubernetes versions
Flux v2.7 release notes list Kubernetes 1.32 through 1.34, with Kubernetes 1.34 support starting at 1.34.1.
high confidence · verified 2026-10-08 · runtime
Primary evidence
Every constraint above is backed by upstream documentation, tagged source, release notes, or another project-owned primary source.
compatibility.fyi