* AWS: Recognize ca-central-1 region ([#38410](https://github.com/kubernetes/kubernetes/pull/38410), [@justinsb](https://github.com/justinsb))
* fix nil dereference when doing a volume type check on persistent volumes ([#39529](https://github.com/kubernetes/kubernetes/pull/39529), [@sjenning](https://github.com/sjenning))

- Added support for installing `arm64` node artifacts. ([#99242](https://github.com/kubernetes/kubernetes/pull/99242), [@liu-cong](https://github.com/liu-cong))

* 🔧 Update sponsors: add Fine. PR [#11784](https://github.com/tiangolo/fastapi/pull/11784) by [@tiangolo](https://github.com/tiangolo).
* 🔧 Tweak sponsors: Kong URL. PR [#11765](https://github.com/tiangolo/fastapi/pull/11765) by [@tiangolo](https://github.com/tiangolo).
* 🔧 Tweak sponsors: Kong URL. PR [#11764](https://github.com/tiangolo/fastapi/pull/11764) by [@tiangolo](https://github.com/tiangolo).

    private static Logger log = LoggerFactory.getLogger(SmbFile.class);

    private long createTime;
    private long lastModified;
    private long lastAccess;
    private int attributes;
    private long attrExpiration;
    private long size;
    private long sizeExpiration;
    private boolean isExists;

    private CIFSContext transportContext;

  // +mapType=atomic
  map<string, string> selector = 2;

  // label selector for pods that should match the replicas count. This is a serializated
  // version of both map-based and more expressive set-based selectors. This is done to
  // avoid introspection in the clients. The string will be in the same format as the
  // query-param syntax. If the target type only supports map-based selectors, both this

#### CustomResourceDefinition OpenAPI Publishing

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

With Kubernetes 1.15 as beta, OpenAPI schemas are also published for CRDs, as long as their schemas are structural.

    // CONTAINS_VALUE_RETRIES increases, though without locking it is theoretically possible.
    final Segment<K, V, E, S>[] segments = this.segments;
    long last = -1L;
    for (int i = 0; i < CONTAINS_VALUE_RETRIES; i++) {
      long sum = 0L;
      for (Segment<K, V, E, S> segment : segments) {
        // ensure visibility of most recent completed write
        int unused = segment.count; // read-volatile

* kubelet to master communication when doing node status updates now has a timeout to prevent indefinite hangs ([#52176](https://github.com/kubernetes/kubernetes/pull/52176), [@liggitt](https://github.com/liggitt))

### AWS

  
  The API does include a few breaking changes:
  - The "extraArgs" component construct is now a list of "name"/"value" pairs instead of a string/string map. This has been done to support duplicate args where needed.
  - The "JoinConfiguration.discovery.timeout" field has been replaced by "JoinConfiguration.timeouts.discovery".