- Resolves spurious `Failed to list *v1.Secret` or `Failed to list *v1.ConfigMap` messages in kubelet logs. ([#99538](https://github.com/kubernetes/kubernetes/pull/99538), [@liggitt](https://github.com/liggitt)) [SIG Auth and Node]

* Add IPv6 address support for pods - does NOT include services ([#23090](https://github.com/kubernetes/kubernetes/pull/23090), [@tgraf](https://github.com/tgraf))
* Use local disk for ConfigMap volume instead of tmpfs ([#25306](https://github.com/kubernetes/kubernetes/pull/25306), [@pmorie](https://github.com/pmorie))

* Release the kubelet client certificate rotation as beta. ([#51045](https://github.com/kubernetes/kubernetes/pull/51045), [@jcbsmpsn](https://github.com/jcbsmpsn))
* Adds --append-hash flag to kubectl create configmap/secret, which will append a short hash of the configmap/secret contents to the name during creation. ([#49961](https://github.com/kubernetes/kubernetes/pull/49961), [@mtaufen](https://github.com/mtaufen))

  
  v1beta3 is now marked as deprecated but will continue to be supported until version 1.34 or later.
  The storage configuration in the kube-system/kubeadm-config ConfigMap is now a v1beta4 ClusterConfiguration. ([#125029](https://github.com/kubernetes/kubernetes/pull/125029), [@neolit123](https://github.com/neolit123))

- kube-proxy...

- kubeadm: Improved resiliency when it comes to updating the `kubeadm-config` configmap upon new control plane joins or resets. This allows for safe multiple control plane joins and/or resets. ([#76821](https://github.com/kubernetes/kubernetes/pull/76821), [@ereslibre](https://github.com/ereslibre))

- [kubectl] Improved the describe output for projected volume sources to clearly indicate whether Secret and ConfigMap entries are optional. ([#129457](https://github.com/kubernetes/kubernetes/pull/129457), [@gshaibi](https://github.com/gshaibi)) [SIG CLI]

* kubelet: resolved hang/timeout issues when running large numbers of pods with unique configmap/secret references ([#74755](https://github.com/kubernetes/kubernetes/pull/74755), [@liggitt](https://github.com/liggitt))

- kubeadm: implement retry logic for certain ConfigMap failures when joining nodes ([#78915](https://github.com/kubernetes/kubernetes/pull/78915), [@ereslibre](https://github.com/ereslibre))

- Kubeadm: do not upload kubelet patch configuration into `kube-system/kubelet-config` ConfigMap ([#123107](https://github.com/kubernetes/kubernetes/pull/123107), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]