* New federation deployment mechanism now allows non-GCP clusters. ([#34620](https://github.com/kubernetes/kubernetes/pull/34620), [@madhusudancs](https://github.com/madhusudancs))
  * Writes the federation kubeconfig to the local kubeconfig file.
* Update the series and the README to reflect the change. ([#30374](https://github.com/kubernetes/kubernetes/pull/30374), [@mbruzek](https://github.com/mbruzek))

* Flex volume plugin is updated to support attach/detach interfaces. It broke backward compatibility. Please update your drivers and implement the new callouts.  ([#41804](https://github.com/kubernetes/kubernetes/pull/41804), [@chakri-nelluri](https://github.com/chakri-nelluri))

## Notable Features

pkg bufio, func ScanWords([]uint8, bool) (int, []uint8, error)
pkg bufio, method (*Reader) WriteTo(io.Writer) (int64, error)
pkg bufio, method (*Scanner) Bytes() []uint8
pkg bufio, method (*Scanner) Err() error
pkg bufio, method (*Scanner) Scan() bool
pkg bufio, method (*Scanner) Split(SplitFunc)
pkg bufio, method (*Scanner) Text() string
pkg bufio, method (*Writer) ReadFrom(io.Reader) (int64, error)

- Correctly handle resetting cpuacct in a live container ([#94041](https://github.com/kubernetes/kubernetes/pull/94041), [@andyzhangx](https://github.com/andyzhangx)) [SIG Node and Windows]
- Fix a concurrent map writes error in kubelet ([#93773](https://github.com/kubernetes/kubernetes/pull/93773), [@knight42](https://github.com/knight42)) [SIG Node]

   ([#123508](https://github.com/kubernetes/kubernetes/pull/123508), [@saschagrunert](https://github.com/saschagrunert))
- Dynamic Resource Allocation: DRA drivers can now use "structured parameters" to let the scheduler handle claim allocation.
   ([#123516](https://github.com/kubernetes/kubernetes/pull/123516), [@pohly](https://github.com/pohly))

- NFS Drivers are now enabled to collect metrics, StatFS metrics provider is used to collect the metrics. (@brahmaroutu) ([#75805](https://github.com/kubernetes/kubernetes/pull/75805), [@brahmaroutu](https://github.com/brahmaroutu))

- Fixed `creationTimestamp: null` causing unnecessary writes to etcd. ([#116865](https://github.com/kubernetes/kubernetes/pull/116865), [@alexzielenski](https://github.com/alexzielenski))

- CRD deep copies should no longer contain shallow copies of `JSONSchemaProps.XValidations`. ([#107956](https://github.com/kubernetes/kubernetes/pull/107956), [@benluddy](https://github.com/benluddy))

Section 10.1.2.2. // K = HMAC (K, V || 0x00 || provided_data) h := hmac.New(hash, K) h.Write(d.V) h.Write([]byte{0x00}) h.Write(entropy) h.Write(nonce) switch s := s.(type) { case plainPersonalization: h.Write(s) case blockAlignedPersonal: l := len(d.V) + 1 + len(entropy) + len(nonce) for _, b := range s { pad000(h, l) h.Write(b) l = len(b) } } K = h.Sum(K[:0]) // V = HMAC (K, V) h = hmac.New(hash, K) h.Write(d.V) d.V = h.Sum(d.V[:0]) // K = HMAC (K, V || 0x01 || provided_data). h.Reset() h.Write(d.V)...

- Fixes creationTimestamp: null causing unnecessary writes to etcd ([#116865](https://github.com/kubernetes/kubernetes/pull/116865), [@alexzielenski](https://github.com/alexzielenski)) [SIG API Machinery and Testing]