* Leaked File descriptors ([#275](https://github.com/docker/containerd/issues/275))

        * Additional memory overhead per container ([#21737](https://github.com/kubernetes/kubernetes/pull/21737))

      which can be identified by the [node problem detector](http://kubernetes.io/docs/admin/node-problem/)
    * Leaked File descriptors ([#275](https://github.com/docker/containerd/issues/275))
    * Additional memory overhead per container ([#21737](https://github.com/docker/docker/issues/21737))

* na ([#79892](https://github.com/kubernetes/kubernetes/pull/79892), [@mikebrow](https://github.com/mikebrow))
* Use O_CLOEXEC to ensure file descriptors do not leak to subprocesses. ([#74691](https://github.com/kubernetes/kubernetes/pull/74691), [@cpuguy83](https://github.com/cpuguy83))

    <_comment>SSEYO Koan File</_comment>
    <glob pattern="*.skp"/>
    <glob pattern="*.skd"/>
    <glob pattern="*.skt"/>
    <glob pattern="*.skm"/>
  </mime-type>
  <mime-type type="application/vnd.kodak-descriptor">
    <glob pattern="*.sse"/>
  </mime-type>
  <mime-type type="application/vnd.liberty-request+xml"/>
  <mime-type type="application/vnd.llamagraphics.life-balance.desktop">
    <glob pattern="*.lbd"/>

- Fixed a 1.30.0 regression in OpenAPI descriptions of the `imagePullSecrets` and 
  `hostAliases` fields to mark the fields used as keys in those lists as either defaulted
  or required. ([#124553](https://github.com/kubernetes/kubernetes/pull/124553), [@pmalek](https://github.com/pmalek))

### API Change

- Fixes a 1.30.0 regression in openapi descriptions of imagePullSecrets and hostAliases fields to mark the fields used as keys in those lists as either defaulted or required. ([#124553](https://github.com/kubernetes/kubernetes/pull/124553), [@pmalek](https://github.com/pmalek)) [SIG API Machinery]

var s2 = s1                    // s2 stores the slice descriptor of s1
s1 = s1[:1]                    // s1's length is 1 but it still shares its underlying array with s2
s2[0] = 42                     // setting s2[0] changes s1[0] as well
fmt.Println(s1, s2)            // prints [42] [42 2 3]

var m1 = make(map[string]int)
var m2 = m1                    // m2 stores the map descriptor of m1

- `kubelet` now exposes latency metrics of different stages of the node startup. ([#118568](https://github.com/kubernetes/kubernetes/pull/118568), [@qiutongs](https://github.com/qiutongs))

### Documentation

- Added descriptions and examples for the situation of using `kubectl rollout restart` without specifying a particular deployment. ([#120118](https://github.com/kubernetes/kubernetes/pull/120118), [@Ithrael](https://github.com/Ithrael))

- Realigned line breaks from `kubectl explain` descriptions. ([#126533](https://github.com/kubernetes/kubernetes/pull/126533), [@ah8ad3](https://github.com/ah8ad3))
- Removed attachable volume limits from the capacity of the node for the following

- Fixed some missing white spaces in the flag descriptions and logs. ([#131562](https://github.com/kubernetes/kubernetes/pull/131562), [@logica0419](https://github.com/logica0419)) [SIG Network]