- A `create` or `update` API request with duplicate items in a keyed list no longer wipes out managedFields. Examples include env var entries with the same name, or port entries with the same containerPort in a pod spec.

  - The `--export` flag for the `kubectl get` command, deprecated since v1.14, will be removed in v1.18.
  - `kubectl cp` no longer supports copying symbolic links from containers; to support this use case, see `kubectl exec --help` for examples using `tar` directly ([#82143](https://github.com/kubernetes/kubernetes/pull/82143), [@soltysh](https://github.com/soltysh))

- In text format, log messages that previously used quoting to prevent multi-line output (for example, text="some \"quotation\", a\nline break") will now be printed with more readable multi-line output without the escape sequences. ([#107103](https://github.com/kubernetes/kubernetes/pull/107103), [@pohly](https://github.com/pohly))

- Included an additional resource labeltransformation in on_operations_total metric which could be used for resource specific validations for example handling of encryption config by the apiserver. ([#126512](https://github.com/kubernetes/kubernetes/pull/126512), [@kmala](https://github.com/kmala)) [SIG API Machinery, Auth, Etcd and Testing]

- Improved the `FreeDiskSpaceFailed` warning event to provide more actionable details when image garbage collection fails to free enough disk space. Example: `Insufficient free disk space on the node's image filesystem (95.0% of 10.0 GiB used). Failed to free sufficient space by deleting unused images. Consider resizing the disk or deleting unused files.`. ([#132578](https://github.com/kubernetes/kub...

  
  If `username.expression` used 'claims.email', then 'claims.email_verified' must have been used in `username.expression` or `extra[*].valueExpression` or `claimValidationRules[*].expression`. An example claim validation rule expression that matches the validation automatically applied when `username.claim` is set to 'email' is 'claims.?email_verified.orValue(true) == true'.

	}

	s.RLock()
	formatLegacy := s.formatLegacy
	s.RUnlock()

	dstBuf, err := xioutil.ReadFile(dstFilePath)
	if err != nil {
		// handle situations when dstFilePath is 'file'
		// for example such as someone is trying to
		// upload an object such as `prefix/object/xl.meta`
		// where `prefix/object` is already an object
		if isSysErrNotDir(err) && runtime.GOOS != globalWindowsOSName {

  
  Action required for custom scheduler plugin developers:
  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. 

- Updated command descriptions and examples for grammar and punctuation consistency. ([#103524](https://github.com/kubernetes/kubernetes/pull/103524), [@bergerhoffer](https://github.com/bergerhoffer)) [SIG Auth and CLI]

    // Create a certificate with an IP address in the subject alt name.
    val heldCertificate =
      HeldCertificate
        .Builder()
        .commonName("example.com")
        .addSubjectAlternativeName(localIpAddress!!)
        .build()
    val handshakeCertificates =
      HandshakeCertificates
        .Builder()
        .heldCertificate(heldCertificate)