- [Server Binaries](#server-binaries-6)
    - [Node Binaries](#node-binaries-6)
  - [Changelog since v1.12.3](#changelog-since-v1123)
    - [Action Required](#action-required)
    - [Other notable changes](#other-notable-changes-6)
- [v1.12.3](#v1123)
  - [Downloads for v1.12.3](#downloads-for-v1123)
    - [Client Binaries](#client-binaries-7)
    - [Server Binaries](#server-binaries-7)
    - [Node Binaries](#node-binaries-7)

- Modify DNS-1123 error messages to indicate that RFC 1123 is not followed exactly ([#94182](https://github.com/kubernetes/kubernetes/pull/94182), [@mattfenwick](https://github.com/mattfenwick)) [SIG API Machinery, Apps, Auth, Network and Node]

## Urgent Upgrade Notes

### (No, really, you MUST do this before you upgrade)

Before upgrading to Kubernetes 1.13, you must keep the following in mind:

- kube-apiserver

## Changelog since v1.23.15

## Changes by Kind

### API Change

- Kubernetes 1.23 is now built with go1.19.4. To match behavior of previous Kubernetes 1.23 patch releases:
  - `kube-apiserver` defaults the GOGC setting to 63, to approximate go1.17 garbage collection memory performance in heavily loaded API servers

    - [Node Binaries](#node-binaries-6)
  - [Changelog since v1.11.3](#changelog-since-v1113)
    - [Other notable changes](#other-notable-changes-6)
- [v1.11.3](#v1113)
  - [Downloads for v1.11.3](#downloads-for-v1113)
    - [Client Binaries](#client-binaries-7)
    - [Server Binaries](#server-binaries-7)
    - [Node Binaries](#node-binaries-7)
  - [Changelog since v1.11.2](#changelog-since-v1112)
    - [Action Required](#action-required)

  // externalName is the external reference that discovery mechanisms will
  // return as an alias for this service (e.g. a DNS CNAME record). No
  // proxying will be involved.  Must be a lowercase RFC-1123 hostname
  // (https://tools.ietf.org/html/rfc1123) and requires `type` to be "ExternalName".
  // +optional
  optional string externalName = 10;

* 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))
* Fixed [#61123](https://github.com/kubernetes/kubernetes/pull/61123) by triggering syncer.Update on all cases including when a syncer is created ([#61124](https://github.com/kubernetes/kubernetes/pull/61124), [@satyasm](https://github.com/satyasm))
    * on a new add event.

* Fix class name in docstring for `OAuth2PasswordRequestFormStrict`. PR [#1126](https://github.com/tiangolo/fastapi/pull/1126) by [@adg-mh](https://github.com/adg-mh).
* Clarify function name in example in docs. PR [#1121](https://github.com/tiangolo/fastapi/pull/1121) by [@tmsick](https://github.com/tmsick).

        * Additional memory overhead per container ([#21737](https://github.com/kubernetes/kubernetes/pull/21737))

    * Docker 1.10.3 contains [backports provided by RedHat](https://github.com/docker/docker/compare/v1.10.3...runcom:docker-1.10.3-stable) for known issues

* For issues with Docker 1.13.X please see the [1.13.X tracking issue](https://github.com/kubernetes/kubernetes/issues/42926)

* rkt version 1.23.0+

    * Additional memory overhead per container ([#21737](https://github.com/docker/docker/issues/21737))
  * Docker 1.10.3 contains [backports provided by RedHat](https://github.com/docker/docker/compare/v1.10.3...runcom:docker-1.10.3-stable) for known issues
  * Support for Docker version 1.9.x has been removed
* rkt version 1.23.0+