- Added a new IPAddress object kind

* Do not consider master instance zones for dynamic volume creation ([#41702](https://github.com/kubernetes/kubernetes/pull/41702), [@justinsb](https://github.com/justinsb))
* Fix AWS device allocator to only use valid device names ([#41455](https://github.com/kubernetes/kubernetes/pull/41455), [@gnufied](https://github.com/gnufied))

  Enabled the `MultiCIDRRangeAllocator` by setting `--cidr-allocator-type=MultiCIDRRangeAllocator` flag in kube-controller-manager. ([#109090](https://github.com/kubernetes/kubernetes/pull/109090), [@sarveshr7](https://github.com/sarveshr7))

- Removed the generally available feature gate `ProxyTerminatingEndpoints`. ([#122134](https://github.com/kubernetes/kubernetes/pull/122134), [@ty-dc](https://github.com/ty-dc))

  Notes:
  1. Only the first two CIDRs are used (soft limits for Alpha, might be lifted later on).
  2. Only the "RangeAllocator" (default) is allowed as a value for `--cidr-allocator-type`. Cloud allocators are not compatible with IPv6 dual stack
     ([#73977](https://github.com/kubernetes/kubernetes/pull/73977), [@khenidak](https://github.com/khenidak))

* kubernetes-master charm now properly clears the client-ca-file setting on the apiserver snap ([#61479](https://github.com/kubernetes/kubernetes/pull/61479), [@hyperbolic2346](https://github.com/hyperbolic2346))
* Bound cloud allocator to 10 retries with 100 ms delay between retries. ([#61375](https://github.com/kubernetes/kubernetes/pull/61375), [@satyasm](https://github.com/satyasm))

- the IP allocator in v1.17.0 can return errors such as `the cluster IP <ip> for service <service-name> is not within the service CIDR <cidr>; please recreate` in the logs of the kube-apiserver. The cause is incorrect CIDR calculations if the service CIDR (`--serv...

- KEP-1880: Users of the new feature to add multiple service CIDR will use by default a dual-write strategy on the new ClusterIP allocators to avoid the problem of possible duplicate IPs allocated to Services when running skewed kube-apiservers using different allocators. They can opt-out of this behavior by enabled the feature gate DisableAllocatorDualWrite. ([#122047](https://github.com/kubernetes/kubernetes/pull/122047), [@aojea](https://github.com/aojea))...

### Other notable changes

* Backport of the IPAM allocator enhancements to 1.8 branch. ([#62041](https://github.com/kubernetes/kubernetes/pull/62041), [@satyasm](https://github.com/satyasm))

    * - Don't generate empty record for externalName service.
    * - Add validation for upstreamNameserver port.
    * - Update go version to 1.9.3.
* Backport Cloud CIDR allocator fixes to 1.9 ([#61797](https://github.com/kubernetes/kubernetes/pull/61797), [@satyasm](https://github.com/satyasm))