The CSI Migration feature for vSphere Volume also requires minimum vSphere vCenter/ESXi Version to be 7.0u1 and minimum HW Version to be VM version 15.
  

- The `EmptyDir` memory backed volumes are sized as the minimum of pod allocatable memory on a host and an optional explicit user provided value. ([#101048](https://github.com/kubernetes/kubernetes/pull/101048), [@dims](https://github.com/dims))

- kubeadm: Bumped the minimum supported Docker version to 1.13.1 ([#77051](https://github.com/kubernetes/kubernetes/pull/77051), [@chenzhiwei](https://github.com/chenzhiwei))

* Image GC logic should compensate for reserved blocks ([#27996](https://github.com/kubernetes/kubernetes/pull/27996), [@ronnielai](https://github.com/ronnielai))
* Bump minimum API version for docker to 1.21 ([#27208](https://github.com/kubernetes/kubernetes/pull/27208), [@yujuhong](https://github.com/yujuhong))

* Supporting only etcd3, with 3.0.14 as the minimum version.

  * We have renamed “minions” to “nodes”.  If you were specifying NUM\_MINIONS or
MINION\_SIZE to kube-up, you should now specify NUM\_NODES or NODE\_SIZE.

### Known Issues

  * Paused deployments can't be resized and don't clean up old ReplicaSets.
  * Minimum memory limit is 4MB. This is a docker limitation
  * Minimum CPU limits is 10m. This is a Linux Kernel limitation

  * Add `kubectl rollout status`
* Security/Auth
  * L7 LB controller and disk attach controllers run on master, so nodes do not need those privileges.
  * Setting TLS1.2 minimum
  * `kubectl create secret tls` command
  * Webhook Token Authenticator
  * **beta** PodSecurityPolicy objects limits use of security-sensitive features by pods.
* Kubectl
  * Display line number on JSON errors

### Network

- Reduces the cache TTL for negative responses to 5s minimum. ([#74093](https://github.com/kubernetes/kubernetes/pull/74093), [@blakebarnett](https://github.com/blakebarnett))

### Node

- `kubelet` now allows pods to use the `net.ipv4.tcp_keepalive_time` sysctl by default
  and the minimal kernel version is 4.5; Pod Security Admission allows this sysctl
  in `v1.29+` versions of the baseline and restricted policies. ([#118846](https://github.com/kubernetes/kubernetes/pull/118846), [@cyclinder](https://github.com/cyclinder))

- Clarified the CFS quota as 100ms in the code comments and set the minimum `cpuCFSQuotaPeriod` to 1ms to match Linux kernel expectations. ([#112123](https://github.com/kubernetes/kubernetes/pull/112123), [@paskal](https://github.com/paskal))