- Kubeadm: uses the api-server AdvertiseAddress IP family to choose the etcd endpoint IP family for non external etcd clusters ([#85745](https://github.com/kubernetes/kubernetes/pull/85745), [@aojea](https://github.com/aojea)) [SIG Cluster Lifecycle]

pkg runtime/metrics, type Float64Histogram struct, Buckets []float64
pkg runtime/metrics, type Float64Histogram struct, Counts []uint64
pkg runtime/metrics, type Sample struct
pkg runtime/metrics, type Sample struct, Name string
pkg runtime/metrics, type Sample struct, Value Value
pkg runtime/metrics, type Value struct
pkg runtime/metrics, type ValueKind int

pkg syscall (netbsd-arm64-cgo), type RawSockaddrInet4 struct, Family uint8
pkg syscall (netbsd-arm64-cgo), type RawSockaddrInet4 struct, Len uint8
pkg syscall (netbsd-arm64-cgo), type RawSockaddrInet4 struct, Zero [8]int8
pkg syscall (netbsd-arm64-cgo), type RawSockaddrInet6 struct, Family uint8
pkg syscall (netbsd-arm64-cgo), type RawSockaddrInet6 struct, Len uint8

  // manually, the requested family is available in the cluster,
  // and ipFamilyPolicy allows it, it will be used; otherwise creation of
  // the service will fail. This field is conditionally mutable: it allows
  // for adding or removing a secondary IP family, but it does not allow
  // changing the primary IP family of the Service. Valid values are "IPv4"

- Fix a bug in kube-proxy that caused it to crash when using load balancers with a different IP family ([#87117](https://github.com/kubernetes/kubernetes/pull/87117), [@aojea](https://github.com/aojea)) [SIG Network]

#### Azure

- Kubelet can now run without identity on Azure. A sample cloud provider configuration is:  `{"vmType": "vmss", "useInstanceMetadata": true, "subscriptionId": "<subscriptionId>"}` ([#77906](https://github.com/kubernetes/kubernetes/pull/77906), [@feiskyer](https://github.com/feiskyer))

CSI was first introduction as alpha in Kubernetes v1.9 and moved to beta in Kubernetes v1.10.

You can find a list of sample and production drivers in the [CSI Documentation](https://kubernetes.io/docs/concepts/storage/volumes/#csi).

*   An example CRD controller has been added, at [github.com/kubernetes/sample-controller](https://github.com/kubernetes/sample-controller). ([#52753](https://github.com/kubernetes/kubernetes/pull/52753),[ @munnerz](https://github.com/munnerz))

- Kubenet: added HostPort IPv6 support.  HostPortManager: operates only with one IP family, failing if receives port mapping entries with different IP families.  HostPortSyncer: operates only with one IP family, skipping portmap entries with different IP families ([#80854](https://github.com/kubernetes/kubernetes/pull/80854), [@aojea](https://github.com/aojea))

- When a CNI plugin returns dual-stack pod IPs, kubelet will now try to respect the
  "primary IP family" of the cluster by picking a primary pod IP of the same family
  as the (primary) node IP, rather than assuming that the CNI plugin returned the IPs
  in the order the administrator wanted (since some CNI plugins don't allow