String API_JSON_RESPONSE_HEADERS = "api.json.response.headers";

    /** The key of the configuration. e.g. false */
    String API_JSON_RESPONSE_EXCEPTION_INCLUDED = "api.json.response.exception.included";

    /** The key of the configuration. e.g.  */
    String API_GSA_RESPONSE_HEADERS = "api.gsa.response.headers";

    /** The key of the configuration. e.g. false */

  // +optional
  optional string host = 3;

  // Scheme to use for connecting to the host.
  // Defaults to HTTP.
  // +optional
  optional string scheme = 4;

  // Custom headers to set in the request. HTTP allows repeated headers.
  // +optional
  repeated HTTPHeader httpHeaders = 5;
}

// HTTPHeader describes a custom header to be used in HTTP probes
message HTTPHeader {
  // The header field name

- Kube-controller-manager: Fixes bug setting headless service labels on endpoints ([#85361](https://github.com/kubernetes/kubernetes/pull/85361), [@liggitt](https://github.com/liggitt))

- Adds `create ingress` command to `kubectl` ([#78153](https://github.com/kubernetes/kubernetes/pull/78153), [@amimof](https://github.com/amimof)) [SIG CLI and Network]
- Adds a headless service on node-local-cache addon. ([#88412](https://github.com/kubernetes/kubernetes/pull/88412), [@stafot](https://github.com/stafot)) [SIG Cloud Provider and Network]

- fixes a validation error that could prevent updates to StatefulSet objects containing non-normalized resource requests ([#66165](https://github.com/kubernetes/kubernetes/pull/66165), [@liggitt](https://github.com/liggitt))
- Headless Services with no ports defined will now create Endpoints correctly, and appear in DNS. ([#67622](https://github.com/kubernetes/kubernetes/pull/67622), [@thockin](https://github.com/thockin))

- Services implemented a field selector for the ClusterIP and Type fields.
  The Kubelet uses this field selector to avoid monitoring Headless Services, which helps reduce memory consumption. ([#123905](https://github.com/kubernetes/kubernetes/pull/123905), [@aojea](https://github.com/aojea)) [SIG Apps, Node and Testing]

- On single-stack configured (IPv4 or IPv6, but not both) clusters, Services which are both headless (no clusterIP) and selectorless (empty or undefined selector) will report `ipFamilyPolicy RequireDualStack` and will have entries in `ipFamilies[]` for both IPv4 and IPv6.  This is a change from alpha, but does not have any impact on the manually-specified...

- Handle Generic Ephemeral Volumes properly in the node limits scheduler filter and the kubelet `hostPath` check. ([#100482](https://github.com/kubernetes/kubernetes/pull/100482), [@pohly](https://github.com/pohly))

- Fixed the EndpointSliceController to correctly create endpoints for IPv6-only pods.
  
  Fixed the EndpointController to allow IPv6 headless services, if the IPv6DualStack
  feature gate is enabled, by specifying `ipFamily: IPv6` on the service. (This already

* [Federation] Make federation etcd PVC size configurable ([#36310](https://github.com/kubernetes/kubernetes/pull/36310), [@irfanurrehman](https://github.com/irfanurrehman))
* Allow no ports when exposing headless service ([#32811](https://github.com/kubernetes/kubernetes/pull/32811), [@fraenkel](https://github.com/fraenkel))