OpenYurt Files

What's New

OTA Upgrade Supports Image Preheating for DaemonSet

OTA (Over-The-Air) upgrade is a new upgrade model for DaemonSet workloads introduced by OpenYurt. In previous versions, image pulling occurred synchronously during the Pod restart phase of the upgrade, making it a critical-path operation that directly contributed to service downtime, especially in edge environments with limited or unstable network connectivity.

In v1.7.0, OTA upgrade now supports image preheating, which decouples image pulling from the actual rollout cutover. A new ImagePreHeat controller is responsible for dispatching image preheating Jobs to edge nodes, allowing updated container images to be proactively downloaded before the upgrade is triggered. Two new Pod conditions (PodNeedUpgrade and PodImageReady) are introduced to track upgrade status and image readiness. Users can initiate preheating via a new OTA API endpoint (POST /openyurt.io/v1/namespaces/{ns}/pods/{podname}/imagepull). By pre-caching images ahead of the cutover, service interruption during the actual upgrade is minimized to near-zero. #2482 #2474

Support Deploying Kubernetes Clusters Locally (K8s-on-K8s)

OpenYurt v1.7.0 introduces the ability to deploy a Kubernetes cluster on top of an existing OpenYurt cluster — referred to as K8s-on-K8s. This is particularly useful for scenarios such as testing, multi-tenant isolation, and edge IDC (Internet Data Center) deployments where a full bare-metal Kubernetes setup is not practical.

This release adds YAML-based templates for deploying tenant control-plane components (tenant-apiserver, tenant-controller-manager, tenant-scheduler, tenant-pki-generator, etcd) along with post-install configuration (kube-proxy, kubelet, rbac, bootstrap-secret). yurtadm now supports a local mode for joining IDC nodes into a K8s-on-K8s cluster, and YurtHub is optimized for local mode operation. A setup script (config/setup/K8s-on-K8s/setup.sh) is also provided for quick bootstrapping. #4a1f0ab3 #ed2f7dbf #3a03b00d

Label-Driven YurtHub Deployment via YurtNodeConversion

Previously, YurtHub installation and lifecycle management on edge nodes required manual intervention through yurtadm join or yurtadm reset commands. In v1.7.0, a new YurtNodeConversionController in yurt-manager enables label-driven YurtHub deployment and conversion. By applying a label to a node, users can trigger the automatic installation, configuration, and startup of YurtHub via systemd. The conversion and revert process now uses reusable host lifecycle helpers, enabling a fully declarative, controller-driven workflow for edge node onboarding and offboarding. #249a6714 #f7645df8 #3e02cefa

Support Kubernetes v1.34

All k8s.io/xxx dependencies and related modules have been upgraded to v1.34.0, ensuring OpenYurt is fully compatible with Kubernetes v1.34. E2E testing has been updated to validate the upgrade against a Kubernetes v1.34 cluster. This upgrade also includes vendor dependency updates and Go linting fixes for compatibility with the latest toolchain. #5cccf119 #7589921e

Other Notable changes

• Upgrade nodepool CRD to v1beta2 by @tnsimon in https://github.com/openyurtio/openyurt/pull/2266
• Add hub election leader controller by @tnsimon in https://github.com/openyurtio/openyurt/pull/2281
• Add hub leader config controller by @tnsimon in https://github.com/openyurtio/openyurt/pull/2299
• Add hub leader RBAC controller by @tnsimon in https://github.com/openyurtio/openyurt/pull/2328
• Add health checker for leader hub by @rambohe in https://github.com/openyurtio/openyurt/pull/2310
• Support forward requests to leader hub for sharing pool scope metadata in nodepool by @rambohe in https://github.com/openyurtio/openyurt/pull/2325
• Improve load balancer to support dynamically updating backends by @rambohe in https://github.com/openyurtio/openyurt/pull/2314
• Add leader node names to v1beta2.nodepool by @tnsimon in https://github.com/openyurtio/openyurt/pull/2297
• Rename enablePoolScopeMetadata to enableLeaderElections by @tnsimon in https://github.com/openyurtio/openyurt/pull/2316
• Add consistent hashing strategy for yurthub by @tnsimon in https://github.com/openyurtio/openyurt/pull/2359
• Improve proxy handler for yurthub and optimize metrics of multiplexer by @rambohe in https://github.com/openyurtio/openyurt/pull/2345
• Refactor multiplexer by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2349
• Optimizing hub cache by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2423
• Improve direct clientsets for yurthub by @rambohe in https://github.com/openyurtio/openyurt/pull/2285
• Improve readiness probe for yurthub component by @rambohe in https://github.com/openyurtio/openyurt/pull/2284
• Improve config and start process of yurthub component by @rambohe in https://github.com/openyurtio/openyurt/pull/2303
• Improve yurthub configmap management by @rambohe in https://github.com/openyurtio/openyurt/pull/2275
• Systemd component support for yurthub by @yuyushui66 in https://github.com/openyurtio/openyurt/pull/2449
• Release assets add yurthub binary by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2448
• Remove YurtAppOverrider by @Jessie in https://github.com/openyurtio/openyurt/pull/2280
• Remove yurt-coordinator from yurthub by @rambohe in https://github.com/openyurtio/openyurt/pull/2276
• Refactor: remove yurt-coordinator-cert controller from yurt-manager by @Lixx in https://github.com/openyurtio/openyurt/pull/2322
• Refactor yurt-manager: update CRD categories and remove YurtAppDaemon related code by @Lu Chen in https://github.com/openyurtio/openyurt/pull/2320
• Deprecate yurtmanager delegate lease controller by @tnsimon in https://github.com/openyurtio/openyurt/pull/2308
• Deprecate YurtAppDaemon controller and webhook by @tnsimon in https://github.com/openyurtio/openyurt/pull/2309
• Remove yurt-coordinator from Helm charts by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2477
• Support Kubernetes v1.32 by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2387
• Use autonomy duration label by @tnsimon in https://github.com/openyurtio/openyurt/pull/2313
• Update Go version by @tnsimon in https://github.com/openyurtio/openyurt/pull/2357
• Upgrade upload-artifact to v4 by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2336
• Update codecov-action by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2538
• Update README by @akhilmukkara in https://github.com/openyurtio/openyurt/pull/2464
• Correct some inaccurate information by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2476
• Updated to CNCF Incubating Project by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2470
• Update the OpenYurt architecture diagram by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2485
• Update GVR for core.v1.services by @tnsimon in https://github.com/openyurtio/openyurt/pull/2321
• yurt-manager chart support extraArgs by @William Wang in https://github.com/openyurtio/openyurt/pull/2489

Fixes

• Always overwrite server-addr in yurt-static-set-yurt-hub configmap by yurtadm by @rayne-Li in https://github.com/openyurtio/openyurt/pull/2271
• Test: fix nodepool e2e test by @tnsimon in https://github.com/openyurtio/openyurt/pull/2283
• Fix openyurt fuzz test by @tnsimon in https://github.com/openyurtio/openyurt/pull/2319
• Fix issue 2253 by @RG-Dou in https://github.com/openyurtio/openyurt/pull/2330
• Ensure hub leader configmap is deleted with nodepool by @tnsimon in https://github.com/openyurtio/openyurt/pull/2324
• Fix ota controller doesn't has permission to patch pod status by @PersistentJZH in https://github.com/openyurtio/openyurt/pull/2415
• Fix: Fix the issue where the masterservice and serviceenvupdater modified the multiplexer cache by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2481
• Fix dummy-if name length exceeds 15 by @KubeKyrie in https://github.com/openyurtio/openyurt/pull/2486
• Bugfix: remove deprecated rand.Seed() calls by @shiavm006 in https://github.com/openyurtio/openyurt/pull/2499
• Fix: race condition in cache manager's inMemoryCache by @Shivam Mittal in https://github.com/openyurtio/openyurt/pull/2508
• Fix: restore from backup and return error on ReplaceComponentList create/write failure by @Shivam Mittal in https://github.com/openyurtio/openyurt/pull/2507
• Fix NodeAutonomy condition LastTransitionTime never being updated by @Aman Kumar in https://github.com/openyurtio/openyurt/pull/2502
• Fix: guard nil request info in autonomy proxy by @Shivam Mittal in https://github.com/openyurtio/openyurt/pull/2517
• Fix: nil pointer dereference in local proxy (localDelete/localPost) by @Shivam Mittal in https://github.com/openyurtio/openyurt/pull/2515
• Fix: avoid panic on pod without owner refs by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2509
• Fix: add unit test cases for modifyresponse by @kartik angiras in https://github.com/openyurtio/openyurt/pull/2497
• Fix/UT error by @tnsimon in https://github.com/openyurtio/openyurt/pull/2535

Proposals

• Proposal: reuse list/watch requests in the nodepool for reducing cloud-edge network traffic by @rambohe in https://github.com/openyurtio/openyurt/pull/2226
• Proposal: OTA upgrade supports image preheating by @zyjhtangtang in https://github.com/openyurtio/openyurt/pull/2474
• Proposal: label driven yurthub by @Vacant-lot07734 in https://github.com/openyurtio/openyurt/pull/2530

New Contributors

• @rayne-Li made their first contribution in https://github.com/openyurtio/openyurt/pull/2271
• @Lixxcn made their first contribution in https://github.com/openyurtio/openyurt/pull/2322
• @RG-Dou made their first contribution in https://github.com/openyurtio/openyurt/pull/2330
• @co63oc made their first contribution in https://github.com/openyurtio/openyurt/pull/2344
• @cangqiaoyuzhuo made their first contribution in https://github.com/openyurtio/openyurt/pull/2346
• @yuyushui66 made their first contribution in https://github.com/openyurtio/openyurt/pull/2449
• @PersistentJZH made their first contribution in https://github.com/openyurtio/openyurt/pull/2415
• @xichengliudui made their first contribution in https://github.com/openyurtio/openyurt/pull/2456
• @akhilmukkara made their first contribution in https://github.com/openyurtio/openyurt/pull/2464
• @KubeKyrie made their first contribution in https://github.com/openyurtio/openyurt/pull/2486
• @will4j made their first contribution in https://github.com/openyurtio/openyurt/pull/2489
• @promalert made their first contribution in https://github.com/openyurtio/openyurt/pull/2492
• @kartikangiras made their first contribution in https://github.com/openyurtio/openyurt/pull/2497
• @shiavm006 made their first contribution in https://github.com/openyurtio/openyurt/pull/2499
• @Aman-Cool made their first contribution in https://github.com/openyurtio/openyurt/pull/2502
• @xenonnn4w made their first contribution in https://github.com/openyurtio/openyurt/pull/2495
• @Vacant-lot07734 made their first contribution in https://github.com/openyurtio/openyurt/pull/2530
• @gaganhr94 made their first contribution in https://github.com/openyurtio/openyurt/pull/2543

Full Changelog: https://github.com/openyurtio/openyurt/compare/v1.6.0...v1.7.0