/** The key of the configuration. e.g. anchor */
    String INDEX_FIELD_ANCHOR = "index.field.anchor";

    /** The key of the configuration. e.g. segment */
    String INDEX_FIELD_SEGMENT = "index.field.segment";

    /** The key of the configuration. e.g. role */
    String INDEX_FIELD_ROLE = "index.field.role";

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

*   Azure NSG rules can be consolidated to reduce the likelihood of hitting Azure resource limits (available only in regions where the Augmented Security Groups preview is available).  ([#55740](https://github.com/kubernetes/kubernetes/pull/55740), [@itowlson](https://github.com/itowlson))

admission plugin is enabled.([#51436](https://github.com/kubernetes/kubernetes/pull/51436))

* [Action required] The validation rule for metadata.initializers.pending[x].name is tightened. The initializer name must contain at least three segments, separated by dots. You can create objects with pending initializers and not rely on the API server to add pending initializers according to `initializerConfiguration`. If you do so, update the initializer name in the existing objects and the configuration...

  
  1. `apiGroup`: If set, it must be a valid DNS subdomain (e.g. 'example.com').
  2. `kind` and `name`: It must be valid path segment name. It may not be '.' or '..' and it may not contain '/' and '%' characters. ([#125218](https://github.com/kubernetes/kubernetes/pull/125218), [@carlory](https://github.com/carlory))