### SIG Apps

* Added generators for `apps/v1` deployments. ([#61288](https://github.com/kubernetes/kubernetes/pull/61288), [@ayushpateria](https://github.com/ayushpateria))

### SIG Auth

### CLI

* Use structured generator for kubectl autoscale.  ([#55913](https://github.com/kubernetes/kubernetes/pull/55913), [@wackxu](https://github.com/wackxu))

- The validation-gen code generator generated validation code that supported validation ratcheting. ([#132236](https://github.com/kubernetes/kubernetes/pull/132236), [@yongruilin](https://github.com/yongruilin)) [SIG API Machinery, Apps, Auth and Node]

* Add generate-groups.sh and generate-internal-groups.sh to k8s.io/code-generator to easily run generators against CRD or User API Server types. ([#52186](https://github.com/kubernetes/kubernetes/pull/52186), [@sttts](https://github.com/sttts))

- Fixed a deep copy issue when retrieving the controller reference. ([#124116](https://github.com/kubernetes/kubernetes/pull/124116), [@HiranmoyChowdhury](https://github.com/HiranmoyChowdhury)) [SIG API Machinery and Release]
- Fixed code-generator client-gen to work with `api/v1`-like package structure. ([#125162](https://github.com/kubernetes/kubernetes/pull/125162), [@sttts](https://github.com/sttts)) [SIG API Machinery and Apps]

- The cloudstack and ovirt controllers have been deprecated and will be removed in a future version. ([#68199](https://github.com/kubernetes/kubernetes/pull/68199), [@dims](https://github.com/dims))

- K8s.io/apimachinery - scheme.Convert() now uses only explicitly registered conversions - default reflection based conversion is no longer available. `+k8s:conversion-gen` tags can be used with the `k8s.io/code-generator` component to generate conversions. ([#90018](https://github.com/kubernetes/kubernetes/pull/90018), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery, Apps and Testing]

- Remove support for `node-expansion` between `node-stage` and `node-publish` ([#108614](https://github.com/kubernetes/kubernetes/pull/108614), [@gnufied](https://github.com/gnufied))
- Removed deprecated `generator` and `container-port` flags ([#106824](https://github.com/kubernetes/kubernetes/pull/106824), [@lauchokyip](https://github.com/lauchokyip))

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

With Kubernetes 1.15 as beta, OpenAPI schemas are also published for CRDs, as long as their schemas are structural.

These changes are reflected in the following Kubernetes enhancements:

    * The `generate-internal-groups.sh` script in k8s.io/code-generator will generate OpenAPI definitions by default in `pkg/generated/openapi`. Additional API group dependencies can be added via `OPENAPI_EXTRA_PACKAGES=<group>/<version> <group2>/<version2>...`.