* kube-apiserver: The external hostname no longer longer use the cloud provider API to select a default. It can be set explicitly using --external-hostname, if needed. If there is no default, AdvertiseAddress or os.Hostname() will be used, in that order. ([#56812](https://github.com/kubernetes/kubernetes/pull/56812), [@dims](https://github.com/dims))

### SIG Network

- Corrected family type (inet6) for ipsets in ipv6-only clusters ([#68436](https://github.com/kubernetes/kubernetes/pull/68436), [@uablrek](https://github.com/uablrek))
- kube-proxy argument `hostname-override` can be used to override hostname defined in the configuration file ([#69340](https://github.com/kubernetes/kubernetes/pull/69340), [@stevesloka](https://github.com/stevesloka))

* Fixes issue where you could not mount NFS or glusterFS volumes using hostnames on GCI/GKE with COS images. ([#42376](https://github.com/kubernetes/kubernetes/pull/42376), [@jingxu97](https://github.com/jingxu97))

  - Health check (liveness & readiness) probes using an HTTPGetAction will no longer follow redirects to different hostnames from the original probe request. Instead, these non-local redirects will be treated as a Success (the documented behavior). In this case an event with reason "ProbeWarning" will be generated, indicating that the redirect was ignored. If you were...

### Service
* The 'endpoints.beta.kubernetes.io/hostnames-map' annotation is no longer supported.  Users can use the 'Endpoints.subsets[].addresses[].hostname' field instead. ([#39284](https://github.com/kubernetes/kubernetes/pull/39284), [@bowei](https://github.com/bowei))

### StatefulSet

- Fix panic in kubelet when running IPv4/IPv6 dual-stack mode with a CNI plugin ([#82508](https://github.com/kubernetes/kubernetes/pull/82508), [@aanm](https://github.com/aanm))
- EndpointSlice hostname is now set in the same conditions Endpoints hostname is. ([#84207](https://github.com/kubernetes/kubernetes/pull/84207), [@robscott](https://github.com/robscott))

- Fix isCurrentInstance for Windows by removing the dependency of hostname. ([#89138](https://github.com/kubernetes/kubernetes/pull/89138), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

## Changelog since v1.31.2

## Changes by Kind

### Bug or Regression

*   The kubeadm `--skip-preflight-checks` flag is now deprecated and will be removed in a future release.
*   If you are using the cloud provider API to determine the external host address of the apiserver, set `--external-hostname` explicitly instead. The cloud provider detection has been deprecated and will be removed in the future ([#54516](https://github.com/kubernetes/kubernetes/pull/54516),[ @dims](https://github.com/dims))

### **Multicluster**

- Fixed a bug that occurred when the hostname label of a node did not match the node name, pods bound to a PersistentVolume with `nodeAffinity` using the hostname may be scheduled to the wrong node or experience scheduling failures. ([#125398](https://github.com/kubernetes/kubernetes/pull/125398), [@AxeZhan](https://github.com/AxeZhan)) [SIG Scheduling...