- Validation rules for Custom Resource Definitions can be written in the [CEL expression language](https://github.com/google/cel-spec)...

- **Apps**
  - [stable] When replica sets cannot create pods, they will now report detail via the API about the underlying reason ([kubernetes/features#120](https://github.com/kubernetes/enhancements/issues/120))

* Bumped Heapster to v1.1.0. ([#27542](https://github.com/kubernetes/kubernetes/pull/27542), [@piosz](https://github.com/piosz))
    * More details about the release https://github.com/kubernetes/heapster/releases/tag/v1.1.0
* Deleting federation-push.sh ([#27400](https://github.com/kubernetes/kubernetes/pull/27400), [@nikhiljindal](https://github.com/nikhiljindal))

			// save the index to set correct error at this index.
			Idx: i,
		}
		vr.SetTierFreeVersionID(mustGetUUID())
		// VersionID is not set means delete is not specific about
		// any version, look for if the bucket is versioned or not.
		if objects[i].VersionID == "" {
			// MinIO extension to bucket version configuration
			suspended := opts.VersionSuspended

- Improvements were made to `kubeadm reset` related to cleaning  etcd and notifying the user about the state of iptables.
- kubeadm commands now print warnings if input YAML documents contain unknown or duplicate fields.

	}
	if !globalSiteReplicatorCred.IsValid() {
		globalSiteReplicatorCred.Set(sa.SecretKey)
	}

	return nil
}

// GetIDPSettings returns info about the configured identity provider. It is
// used to validate that all peers have the same IDP.
func (c *SiteReplicationSys) GetIDPSettings(ctx context.Context) madmin.IDPSettings {
	s := madmin.IDPSettings{}

			defer wg.Done()
			dobjects[idx], derrs[idx] = pool.DeleteObject(ctx, bucket, object, opts)
		}(idx, pool)
	}
	wg.Wait()

	// the poolIndices array is pre-sorted in order of latest ModTime, we care only about pool with latest object though
	// the delete call tries to clean up other pools during DeleteObject call.
	objInfo = dobjects[0]
	objInfo.Name = decodeDirObject(object)
	err = derrs[0]
	return objInfo, err
}

- Kubelet podresources API now provides the information about active pods only. ([#79409](https://github.com/kubernetes/kubernetes/pull/79409), [@takmatsu](https://github.com/takmatsu)) [SIG Node]

     *
     * @param clusterName the cluster name
     */
    public void setClusterName(final String clusterName) {
        this.clusterName = clusterName;
    }

    /**
     * Gets information about the search engine.
     *
     * @return the engine information
     * @throws SearchEngineClientException if the client is not an HttpClient
     */
    public EngineInfo getEngineInfo() {

- Revised the comment about the feature-gate level for PodFailurePolicy from alpha to beta ([#117814](https://github.com/kubernetes/kubernetes/pull/117814), [@kerthcet](https://github.com/kerthcet)) [SIG Apps]

### Feature