#### Audit Logging
* [alpha] Advanced Auditing enhances the Kubernetes API [audit logging](https://kubernetes.io/docs/tasks/debug/debug-cluster/audit/#log-backend) capabilities through a customizable policy, pluggable audit backends, and richer audit data.

#### Encryption at Rest

* A buffered audit backend can be used with other audit backends. ([#60076](https://github.com/kubernetes/kubernetes/pull/60076), [@crassirostris](https://github.com/crassirostris))

    * }
    * If excludeMasterFromStandardLB is not set, it will be default to true, which means master nodes are excluded to the backend of standard LB.
    * Also note standard load balancer doesn't work with annotation `service.beta.kubernetes.io/azure-load-balancer-mode`. This is because all nodes (except master) are added as the LB backends.

* Ensure the backend pools are set correctly for Azure SLB with multiple backend pools (e.g. outbound rules) ([#76691](https://github.com/kubernetes/kubernetes/pull/76691), [@feiskyer](https://github.com/feiskyer))

- Kube-apiserver: redirect responses are no longer returned from backends by default. Set `--aggregator-reject-forwarding-redirect=false` to continue forwarding redirect responses. ([#112193](https://github.com/kubernetes/kubernetes/pull/112193), [@jindijamie](https://github.com/jindijamie)) [SIG API Machinery and Testing]

  - `spec.backend` -> `spec.defaultBackend`
  - `serviceName` -> `service.name`
  - `servicePort` -> `service.port.name` (for string values)
  - `servicePort` -> `service.port.number` (for numeric values)
  - `pathType` no longer has a default value in v1; "Exact", "Prefix", or "ImplementationSpecific" must be specified

  Other Ingress API updates:
  - backends can now be resource or service backends

  The API Server will no longer proxy non-101 responses for upgrade requests. This could break proxied backends (such as an extension API server) that respond to upgrade requests with a non-101 response code. ([#92941](https://github.com/kubernetes/kubernetes/pull/92941), [@tallclair](https://github.com/tallclair)) [SIG API Machinery]
 

	case conf.AccessKey != "" && conf.SecretKey != "":
		creds = credentials.NewStaticV4(conf.AccessKey, conf.SecretKey, "")
	default:
		return nil, errors.New("insufficient parameters for S3 backend authentication")
	}
	opts := &minio.Options{
		Creds:     creds,
		Secure:    u.Scheme == "https",
		Transport: globalRemoteTargetTransport,
		Region:    conf.Region,
	}

### Other notable changes

* Fixes an issue with upgrade requests made via pod/service/node proxy subresources sending a non-absolute HTTP request-uri to backends ([#52065](https://github.com/kubernetes/kubernetes/pull/52065), [@liggitt](https://github.com/liggitt))

// BackendType - represents different backend types.
type BackendType int

// Enum for different backend types.
const (
	Unknown = BackendType(madmin.Unknown)
	// Filesystem backend.
	BackendFS = BackendType(madmin.FS)
	// Multi disk BackendErasure (single, distributed) backend.
	BackendErasure = BackendType(madmin.Erasure)
	// Add your own backend.
)