OpenYurt v1.7.0 ships OTA image preheating for near-zero-downtime edge upgrades, label-driven YurtHub deployment, K8s-on-K8s support, and Kubernetes v1.34 compatibility — alongside removal of several deprecated components.
breakingAudit usage of removed components before upgrading
YurtAppOverrider, YurtAppDaemon (controller + webhook), yurt-coordinator, and the delegate lease controller are gone. If your workloads or Helm charts reference any of these, they will break silently or fail to deploy post-upgrade. Audit your manifests, Helm values, and any automation scripts before cutting over. The NodePool CRD also moves to v1beta2 — verify your tooling handles the new API version and the renamed field (enableLeaderElections replaces enablePoolScopeMetadata).
enhancementAdopt OTA image preheating for edge DaemonSet upgrades
If you manage DaemonSets on edge nodes with constrained or intermittent connectivity, the new ImagePreHeat controller is a practical fix for upgrade-induced downtime. Trigger preheating via the new OTA API endpoint before scheduling the rollout. Watch the PodImageReady condition to confirm images are cached before initiating the actual upgrade. This is especially valuable for large images or nodes behind slow WAN links.
enhancementSwitch to label-driven YurtHub onboarding
The new YurtNodeConversionController lets you onboard and offboard edge nodes by applying a label — no more running yurtadm join manually per node. This is a meaningful operational improvement if you manage fleets of edge nodes. Start testing this workflow in a non-production node pool first, since it interacts with systemd directly and the feature is new in this release.
Key changes (5)
- OTA upgrade now supports image preheating via a new ImagePreHeat controller, decoupling image pulls from rollout cutover to minimize downtime on slow/unstable edge networks
- YurtNodeConversionController enables label-driven YurtHub installation and lifecycle management, replacing manual yurtadm join/reset workflows
- K8s-on-K8s support added: deploy tenant Kubernetes control planes on top of an existing OpenYurt cluster, useful for multi-tenant isolation and edge IDC scenarios
- NodePool CRD promoted to v1beta2, with leader election mechanics added to YurtHub — field renamed from enablePoolScopeMetadata to enableLeaderElections
- YurtAppOverrider, YurtAppDaemon, yurt-coordinator, and the delegate lease controller are all removed in this release