the following properties: "federations".
    * --federations flag is now deprecated. Prefer to set federations via the config-map.
      Federations can be configured by settings the "federations" field to the value currently
      set in the command line.
    * Example:
      ```yaml
      kind: ConfigMap
      apiVersion: v1
      metadata:
        name: kube-dns
        namespace: kube-system
      data:

     * an interface type. 2) An instance of a class implementing that interface
     * so that we can pass non-null instances of the interface.
     *
     * (Currently it's safe to pass instances for which compareTo() always
     * returns 0, but if we had a SingletonImmutableSortedSet, this might no
     * longer be the case.)
     *

    // Obtain m = (-distance mod length), a non-negative value less than "length". This is how many
    // places left to rotate.
    int m = -distance % length;
    m = (m < 0) ? m + length : m;
    // The current index of what will become the first element of the rotated section.
    int newFirstIndex = m + fromIndex;
    if (newFirstIndex == fromIndex) {
      return;
    }

    reverse(array, fromIndex, newFirstIndex);

* Kubeadm is currently omitting etcd certificates in a self-hosted deployment; this will be fixed in a point relelase. ([#61322](https://github.com/kubernetes/kubernetes/issues/61322))

## Known Issues

### Summary API in kubelet doesn't have accelerator metrics

     * If the map does not contain the key, the specified value is associated with the key and the value is returned.
     * In either case, the returned value is the value currently associated with the key in the map.
     * </p>
     *
     * @param <K> the key type of {@link HashMap}
     * @param <V> the value type of {@link HashMap}
     * @param map the map

### Scheduling
* **Multiple schedulers**
  * Modify your PodSpecs that currently use the `scheduler.alpha.kubernetes.io/name` annotation on Pod, to instead use the `schedulerName` field in the PodSpec.

            }
        } catch (Exception e) {
            log.warn("Failed to initialize witness support", e);
        }
    }

    /**
     * Discover witness service for the current server
     *
     * @return witness server address or null if not found
     * @throws IOException if discovery fails
     */
    private InetAddress discoverWitnessService() throws IOException {

   * <p>Iterators returned by the returned iterable do not support the {@link Iterator#remove()}
   * method. The returned lists implement {@link RandomAccess}, whether or not the input list does.
   *
   * <p><b>Note:</b> The current implementation eagerly allocates storage for {@code size} elements.
   * As a consequence, passing values like {@code Integer.MAX_VALUE} can lead to {@link
   * OutOfMemoryError}.
   *

### **OpenStack**

*   Remove the LbaasV1 of OpenStack cloud provider, currently only support LbaasV2. ([#52717](https://github.com/kubernetes/kubernetes/pull/52717),[ @FengyunPan](https://github.com/FengyunPan))

## Known Issues