Kubernetes 1.37 introduces five Node Lifecycle Conditions to signal drain and maintenance

On September 9, 2026, Kubernetes 1.37 reserved five well-known node conditions — DrainInProgress, Drained, MaintenancePlanned, MaintenanceInProgress, and GracefulNodeShutdownInProgress — giving teams a shared way to say why a node is unavailable. Start publishing them in your maintenance automation now, without waiting for core controllers to consume them.