### Migration

Check out the [Pydantic migration guide](https://docs.pydantic.dev/2.0/migration/).

For the things that need changes in your Pydantic models, the Pydantic team built [`bump-pydantic`](https://github.com/pydantic/bump-pydantic).

### Network
- The official kube-proxy image (used by kubeadm, among other things) is now compatible with systems running iptables 1.8 in "nft" mode, and will autodetect which mode it should use. ([#82966](https://github.com/kubernetes/kubernetes/pull/82966), [@danwinship](https://github.com/danwinship))

message VolumeSource {
  // hostPath represents a pre-existing file or directory on the host
  // machine that is directly exposed to the container. This is generally
  // used for system agents or other privileged things that are allowed
  // to see the host machine. Most containers will NOT need this.
  // More info: https://kubernetes.io/docs/concepts/storage/volumes#hostpath
  // ---

- Enable SPDY pings to keep connections alive, so that `kubectl exec` and `kubectl portforward` won't be interrupted. ([#97083](https://github.com/kubernetes/kubernetes/pull/97083), [@knight42](https://github.com/knight42)) [SIG API Machinery and CLI]

- Shell completion has been migrated to Cobra's go solution.  `kubectl` is now smarter about disabling file completion when it does not apply.  Furthermore, completion for the `cp` command does not show all files unless the user has started typing something. ([#96087](https://github.com/kubernetes/kubernetes/pull/96087), [@marckhouzam](https://github.com/marckhouzam)) [SIG CLI]

  
  This is a new major release of kustomize, so there are a few backwards-incompatible changes, most of which are rare use cases, bug fixes with side effects, or things that have been deprecated for multiple releases already:
  

- Using `--log-file` is known to be problematic in 1.15. This presents as things being logged multiple times to the same file. The behaviour and details of this issue, as well as some preliminary attempts at fixing it are documented [here](https://github.com/kubernetes/kubernetes/issues/78734#issuecomment-501372131)

- [`KTIJ-26629`](https://youtrack.jetbrains.com/issue/KTIJ-26629) K2 IDE: Completion of types in anonymous function return is not shortened
- [`KTIJ-26599`](https://youtrack.jetbrains.com/issue/KTIJ-26599) K2 IDE: Typing `do ... while` statement: InvalidFirElementTypeException: "For DO_WHILE with text... FirExpression expected, but FirDoWhileLoopImpl found"

### Service