- Migrate `pkg/kubelet/(cri)` to structured logging ([#99006](https://github.com/kubernetes/kubernetes/pull/99006), [@yangjunmyfm192085](https://github.com/yangjunmyfm192085)) [SIG Node]
- Migrate `pkg/kubelet/(node, pod)` to structured logging ([#98847](https://github.com/kubernetes/kubernetes/pull/98847), [@yangjunmyfm192085](https://github.com/yangjunmyfm192085)) [SIG Node]

- Migrate `cmd/proxy/{config, healthcheck, winkernel}` to structured logging ([#104944](https://github.com/kubernetes/kubernetes/pull/104944), [@jyz0309](https://github.com/jyz0309))
- Migrate `pkg/proxy` to structured logging ([#104908](https://github.com/kubernetes/kubernetes/pull/104908), [@CIPHERTron](https://github.com/CIPHERTron))

  config migrate" command. For both commands unknown APIs or fields will throw errors. ([#118013](https://github.com/kubernetes/kubernetes/pull/118013), [@neolit123](https://github.com/neolit123))

- Migrate `proxy/ipvs/proxier.go` logs to structured logging. ([#97796](https://github.com/kubernetes/kubernetes/pull/97796), [@JornShen](https://github.com/JornShen))
- Migrate `staging/src/k8s.io/apiserver/pkg/registry` logs to structured logging. ([#98287](https://github.com/kubernetes/kubernetes/pull/98287), [@lala123912](https://github.com/lala123912))

  - support for the `v1alpha3` configuration file format is deprecated and will be removed in 1.14. Use `kubeadm config migrate` to migrate `v1alpha3` configuration files to `v1beta1`, which provides improvements in image repository management, addons configuration, and other areas. The documentation for `v1beta1` can be found here: https://godoc.org/k8s.io/kubernetes/cmd/kubea...

- Kubeadm: removed the deprecated `v1beta2` API. kubeadm 1.26's `config migrate`
  command can be used to migrate a `v1beta2` configuration file to `v1beta3` ([#114540](https://github.com/kubernetes/kubernetes/pull/114540), [@pacoxu](https://github.com/pacoxu))

- Migrate Memory Manager to contextual logging ([#130727](https://github.com/kubernetes/kubernetes/pull/130727), [@swatisehgal](https://github.com/swatisehgal)) [SIG Node]
- Migrate pkg/kubelet/volumemanager to contextual logging ([#131306](https://github.com/kubernetes/kubernetes/pull/131306), [@Chulong-Li](https://github.com/Chulong-Li)) [SIG Node]

* The deprecated `ThirdPartyResource` (TPR) API was removed.
  To avoid losing your TPR data, [migrate to CustomResourceDefinition](https://kubernetes.io/docs/tasks/access-kubernetes-api/migrate-third-party-resource/).

* The following deprecated flags were removed from `kube-controller-manager`:

  * `replication-controller-lookup-cache-size`

- `kubeadm.k8s.io/v1beta2` has been deprecated and will be removed in a future release, possibly in 3 releases (one year). You should start using `kubeadm.k8s.io/v1beta3` for new clusters. To migrate your old configuration files on disk you can use the `kubeadm config migrate` command. ([#107013](https://github.com/kubernetes/kubernetes/pull/107013), [@pacoxu](https://github.com/pacoxu))

- API
  - Ingress resources will no longer be served from `extensions/v1beta1` in v1.19. Migrate use to the `networking.k8s.io/v1beta1` API, available since v1.14. Existing persisted data can be retrieved via the `networking.k8s.io/v1beta1` API.