// https://www.iana.org/domains/root/db/cbn.html
cbn

// cbre : CBRE, Inc.
// https://www.iana.org/domains/root/db/cbre.html
cbre

// center : Binky Moon, LLC
// https://www.iana.org/domains/root/db/center.html
center

// ceo : XYZ.COM LLC
// https://www.iana.org/domains/root/db/ceo.html
ceo

// cern : European Organization for Nuclear Research ("CERN")

* Clean up the kube-proxy container image by removing unnecessary packages and files. ([#42090](https://github.com/kubernetes/kubernetes/pull/42090), [@timstclair](https://github.com/timstclair))
* Better compat with very old iptables (e.g. CentOS 6) ([#37594](https://github.com/kubernetes/kubernetes/pull/37594), [@thockin](https://github.com/thockin))

### Scheduler

* hyperkube

  * The hyperkube image has been slimmed down and no longer includes addon manifests and other various scripts. These were introduced for the now removed docker-multinode setup system. ([#44555](https://github.com/kubernetes/kubernetes/pull/44555), [@luxas](https://github.com/luxas))

#### Lifecycle

- Support for deprecated old kubeadm v1alpha3 config has been totally removed. ([#75179](https://github.com/kubernetes/kubernetes/pull/75179), [@rosti](https://github.com/rosti))
- kube-up.sh no longer supports "centos" and "local" providers. ([#76711](https://github.com/kubernetes/kubernetes/pull/76711), [@dims](https://github.com/dims))

#### Network

- Namespace editors and admins can now create leases.coordination.k8s.io and should use this type for leaderelection instead of configmaps. ([#111515](https://github.com/kubernetes/kubernetes/pull/111515), [@deads2k](https://github.com/deads2k)) [SIG API Machinery and Auth]

- Kubernetes components that perform leader election now only support using `Leases` for this. ([#114055](https://github.com/kubernetes/kubernetes/pull/114055), [@aimuz](https://github.com/aimuz))

- The namespace editors and admins can now create leases.coordination.k8s.io and should use this type for leaderelection instead of configmaps. ([#111472](https://github.com/kubernetes/kubernetes/pull/111472), [@deads2k](https://github.com/deads2k))

A security issue was discovered in kube-apiserver that could allow node
updates to bypass a Validating Admission Webhook. You are only affected
by this vulnerability if you run a Validating Admission Webhook for Nodes
that denies admission based at least partially on the old state of the
Node object.

**Note**: This only impacts validating admission plugins that rely on old
values in certain fields, and does not impact calls from kubelets that go

* Log error of failed healthz check ([#53048](https://github.com/kubernetes/kubernetes/pull/53048), [@mrIncompetent](https://github.com/mrIncompetent))
* fix azure file mount limit issue on windows due to using drive letter ([#53629](https://github.com/kubernetes/kubernetes/pull/53629), [@andyzhangx](https://github.com/andyzhangx))

  Plugins **have to** implement a QueueingHint for Pod/Update event if the rejection from them could be resolved by updating unscheduled Pods themselves.
  Example: suppose you develop a custom plugin that denies Pods that have a `schedulable=false` label.