- Simplied validation error message for invalid fields by removing redundant field name. ([#132513](https://github.com/kubernetes/kubernetes/pull/132513), [@xiaoweim](https://github.com/xiaoweim)) [SIG API Machinery, Apps, Auth, Node and Scheduling]

- Improve CPU sample sanitization in HPA by taking metric's freshness into account. ([#68068](https://github.com/kubernetes/kubernetes/pull/68068), [@krzysztof-jastrzebski](https://github.com/krzysztof-jastrzebski))

- Projects which use k8s.io/code-generator and invoke `generate-groups` or `generate-internal-groups.sh` have a new, simpler script (`kube_codegen.sh`) they can use.  The old scripts are deprecated but remain intact. ([#117262](https://github.com/kubernetes/kubernetes/pull/117262), [@thockin](https://github.com/thockin)) [SIG API Machinery and Instrumentation]

- Fixed a bug where `events/v1` `Events` with similar event type and reporting instance were not aggregated by `client-go`. ([#112365](https://github.com/kubernetes/kubernetes/pull/112365), [@dgrisonnet](https://github.com/dgrisonnet))

- google.golang.org/genproto/googleapis/bytestream: e85fd2c
- google.golang.org/grpc/cmd/protoc-gen-go-grpc: v1.1.0
- gopkg.in/gcfg.v1: v1.2.3
- gopkg.in/warnings.v0: v0.1.2
- rsc.io/quote/v3: v3.1.0
- rsc.io/sampler: v1.3.0



# v1.31.0-rc.1


## Downloads for v1.31.0-rc.1



### Source Code

filename | sha512 hash
-------- | -----------

*   An example CRD controller has been added, at [github.com/kubernetes/sample-controller](https://github.com/kubernetes/sample-controller). ([#52753](https://github.com/kubernetes/kubernetes/pull/52753),[ @munnerz](https://github.com/munnerz))

- Add fish shell completion to kubectl. ([#92989](https://github.com/kubernetes/kubernetes/pull/92989), [@WLun001](https://github.com/WLun001))
- Add mechanism to load simple sniffer class into fluentd-elasticsearch image ([#92853](https://github.com/kubernetes/kubernetes/pull/92853), [@cosmo0920](https://github.com/cosmo0920))
- Add support for Portworx plugin to csi-translation-lib. Alpha release
  

#### Azure

- Kubelet can now run without identity on Azure. A sample cloud provider configuration is:  `{"vmType": "vmss", "useInstanceMetadata": true, "subscriptionId": "<subscriptionId>"}` ([#77906](https://github.com/kubernetes/kubernetes/pull/77906), [@feiskyer](https://github.com/feiskyer))

- Ephemeral containers have been added in alpha. These temporary containers can be added to running pods for purposes such as debugging, similar to how `kubectl exec` runs a process in an existing container. Also like `kubectl exec`, no resources are reserved for ephemeral containers and they are not restarted when they exit. Note that container namespace targeting is not yet implemented,...

### SIG Storage

[SIG Storage][] is responsible for storage and volume plugin components.

For the 1.8 release, SIG Storage extended the Kubernetes storage API. In addition to providing simple
volume availability, the API now enables volume resizing and snapshotting. These features are in alpha.
The SIG also focused on providing more control over storage: the ability to set requests and