* Support multiple scale sets in Azure cloud provider. ([#57543](https://github.com/kubernetes/kubernetes/pull/57543), [@feiskyer](https://github.com/feiskyer))

* Support LoadBalancer for Azure Virtual Machine Scale Sets ([#57131](https://github.com/kubernetes/kubernetes/pull/57131), [@feiskyer](https://github.com/feiskyer))

  // Defaults to 6
  // +optional
  optional int32 backoffLimit = 7;

  // A label query over pods that should match the pod count.
  // Normally, the system sets this field for you.
  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 4;

which one\n  const element1root = getRoot(element1);\n  if (element1root.host) {\n    return findCommonOffsetParent(element1root.host, element2);\n  } else {\n    return findCommonOffsetParent(element1, getRoot(element2).host);\n  }\n}\n","/**\n * Gets the scroll value of the given element in the given side (top and left)\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @argument {String} side `top` or `left`\n * @returns {number} amount of scrolled pixels\n */\nexport default...

*   A new service annotation `service.beta.kubernetes.io/azure-dns-label-name` now sets the Azure DNS label for a public IP address. ([#47849](https://github.com/kubernetes/kubernetes/pull/47849),[ @tomerf](https://github.com/tomerf))

  //   - 'map': `X + Y` performs a merge where the array positions of all keys in `X` are preserved but the values
  //     are overwritten by values in `Y` when the key sets of `X` and `Y` intersect. Elements in `Y` with
  //     non-intersecting keys are appended, retaining their partial order.
  // Required.
  optional string Expression = 1;

- Supporting Cross RG resources (disks, Azure File and node [Experimental]

Besides the above new features, support for Azure Virtual Machine Scale Sets (VMSS) and Cluster-Autoscaler is now stable and considered GA:

- Azure virtual machine scale sets (VMSS) allow you to create and manage identical load balanced VMs that automatically increase or decrease based on demand or a set schedule.

* Adds a new `kubeadm config` command that lets users tell `kubeadm upgrade` what kubeadm configuration to use and lets users view the current state. ([#50980](https://github.com/kubernetes/kubernetes/pull/50980), [@luxas](https://github.com/luxas))

    multipartReader.use {
      while (true) {
        val part = multipartReader.nextPart() ?: break
        process(part.headers, part.body)
      }
    }
    ```

 *  New: `MediaType.parameter()` gets a parameter like `boundary` from a media type like
    `multipart/mixed; boundary="abc"`.

 *  New: `Authenticator.JAVA_NET_AUTHENTICATOR` forwards authentication requests to

This simplicity and flexibility allow doing things like using NoSQL databases as the main data storage system.

As it is very simple, it's relatively intuitive to learn, although the documentation gets somewhat technical at some points.

## Changelog since v1.15.3

### Other notable changes

* Restores compatibility with kubectl client-side validation when structural schemas are present in a CRD which sets spec.preserveUnknownFields=true ([#82666](https://github.com/kubernetes/kubernetes/pull/82666), [@liggitt](https://github.com/liggitt))