Caching
=======

OkHttp implements an optional, off by default, Cache. OkHttp aims for RFC correct and
pragmatic caching behaviour, following common real-world browser like Firefox/Chrome and 
server behaviour when ambiguous.

# Basic Usage

```kotlin
  private val client: OkHttpClient = OkHttpClient.Builder()
      .cache(Cache(
          directory = File(application.cacheDir, "http_cache"),
          // $0.05 worth of phone storage in 2020

### Bug or Regression

  // but should apply for any default implementation. If set, it is assumed that a load balancer
  // implementation is watching for Services with a matching class. Any default load balancer
  // implementation (e.g. cloud providers) should ignore Services that set this field.
  // This field can only be set when creating or updating a Service to type 'LoadBalancer'.

	([docs](http://kubernetes.io/docs/user-guide/federation/federated-ingress.md))
	([kubernetes/features#82](https://github.com/kubernetes/enhancements/issues/82))
  - [beta] `Federated Replica Sets` create and maintain matching
    `Replica Set`s in some or all clusters in a federation, with the
    desired replica count distributed equally or according to
    specified per-cluster weights.

### Bug or Regression

#### Cluster Selection
* [alpha] Federation [ClusterSelector annotation](https://kubernetes.io/docs/tasks/administer-federation/cluster/#clusterselector-annotation) to direct objects to federated clusters with matching labels.


### **Instrumentation**
#### Core Metrics API

the extended resource is exported by a device plugin, its capacity will change to a valid value after the device plugin re-connects with the Kubelet. If the extended resource is exported by an external component through direct node status capacity patching, the component should repatch the field after kubelet becomes ready again. During the time gap, pods previously assigned with such resources may fail kubelet admission but their controller should create new pods in response to such failures. ([#...

- Namespace API objects now have a `kubernetes.io/metadata.name` label matching their metadata.name field to allow selecting any namespace by its name using a label selector. ([#96968](https://github.com/kubernetes/kubernetes/pull/96968), [@jayunit100](https://github.com/jayunit100)) [SIG API Machinery, Apps, Cloud Provider,...

- Fix output of `kubectl get --watch-only` when watching a single resource ([#79345](https://github.com/kubernetes/kubernetes/pull/79345), [@liggitt](https://github.com/liggitt))

			fmt.Fprintf(writer, "%sWARNING POD DOES NOT MATCH ANY SUBSETS.  (Non matching subsets %s)\n",
				printSpaces(initPrintNum+printLevel1), strings.Join(nonmatchingSubsets, ","))
		}
		fmt.Fprintf(writer, "%sMatching subsets: %s\n",
			printSpaces(initPrintNum+printLevel1), strings.Join(matchingSubsets, ","))
		if len(nonmatchingSubsets) > 0 {
			fmt.Fprintf(writer, "%s(Non-matching subsets %s)\n",