([#79073](https://github.com/kubernetes/kubernetes/pull/79073), [@rafatio](https://github.com/rafatio))
- Fix kubelet NodeLease potential performance issues. Kubelet now will try to update lease using cached one instead of get from API Server every time. ([#81174](https://github.com/kubernetes/kubernetes/pull/81174), [@answer1991](https://github.com/answer1991))

## Changelog since v1.6.11

### Other notable changes

* Azure cloudprovider: Fix controller manager crash issue on a manually created k8s cluster. ([#53694](https://github.com/kubernetes/kubernetes/pull/53694), [@andyzhangx](https://github.com/andyzhangx))

- When `SchedulerQueueingHints` is enabled, clear events cached in the scheduling queue as soon as possible so that the scheduler consumes less memory. ([#120586](https://github.com/kubernetes/kubernetes/pull/120586), [@sanposhiho](https://github.com/sanposhiho)) [SIG Scheduling]

# optionally, remove the old secret
kubectl delete secret --namespace=federation federation-apiserver-secret
```

- Kubernetes components no longer handle panics, and instead actively crash.  All Kubernetes components should be run by something that actively restarts them. This is true of the default setups, but those with custom environments may need to double-check (#28800, @lavalamp)

- Bumped `ProcMountType` feature to on by default beta ([#130798](https://github.com/kubernetes/kubernetes/pull/130798), [@haircommander](https://github.com/haircommander)) [SIG Node]
- Calculated pod resources are now cached when adding pods to NodeInfo in the scheduler framework, improving performance when processing unschedulable pods. ([#129635](https://github.com/kubernetes/kubernetes/pull/129635), [@macsko](https://github.com/macsko)) [SIG Scheduling]

- Fixed a 1.26.7 regression where kube-controller-manager can crash when StatefulSet with Parallel policy and PVC labels is scaled up. ([#121186](https://github.com/kubernetes/kubernetes/pull/121186), [@aleksandra-malinowska](https://github.com/aleksandra-malinowska)) [SIG Apps]

- Avoid caching the Azure VMSS instances whose network profile is nil ([#100948](https://github.com/kubernetes/kubernetes/pull/100948), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]
- Azure: avoid setting cached Sku when updating VMSS and VMSS instances ([#102005](https://github.com/kubernetes/kubernetes/pull/102005), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

- Kube-apiserver: fixes a potential crash serving CustomResourceDefinitions that combine an invalid schema and CEL validation rules. ([#126167](https://github.com/kubernetes/kubernetes/pull/126167), [@cici37](https://github.com/cici37)) [SIG API Machinery and Testing]

- Avoid caching the Azure VMSS instances whose network profile is nil ([#100948](https://github.com/kubernetes/kubernetes/pull/100948), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]
- Azure: avoid setting cached Sku when updating VMSS and VMSS instances ([#102005](https://github.com/kubernetes/kubernetes/pull/102005), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

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