Kubernetes 1.37 Release Introduces Breaking Changes, Deprecates IPVS Mode

Kubernetes 1.37, released on August 26, 2026, brings significant changes to its networking defaults. The IPVS mode in kube-proxy is now formally deprecated, with `nftables` taking over as the default packet-forwarding backend. Additionally, static pods will no longer be able to reference secrets or config maps. These are non-optional changes that require operators to perform pre-upgrade audits to avoid cluster issues. The release includes approximately 86 tracked enhancements, with 16 graduating to stable.