Merge master into dev-1.21 to keep in sync, plus latest API reference

This sync merge includes API reference updates.

content/en/docs/concepts/overview/components.md

@@ -33,7 +33,8 @@ The control plane's components make global decisions about the cluster (for exam
 Control plane components can be run on any machine in the cluster. However,
 for simplicity, set up scripts typically start all control plane components on
 the same machine, and do not run user containers on this machine. See
-[Building High-Availability Clusters](/docs/admin/high-availability/) for an example multi-master-VM setup.
+[Creating Highly Available clusters with kubeadm](/docs/setup/production-environment/tools/kubeadm/high-availability/)
+for an example control plane setup that runs across multiple VMs.
 
 ### kube-apiserver
 
@@ -132,4 +133,3 @@ saving container logs to a central log store with search/browsing interface.
 * Learn about [Controllers](/docs/concepts/architecture/controller/)
 * Learn about [kube-scheduler](/docs/concepts/scheduling-eviction/kube-scheduler/)
 * Read etcd's official [documentation](https://etcd.io/docs/)
-

content/en/docs/concepts/overview/working-with-objects/names.md

@@ -24,6 +24,10 @@ For non-unique user-provided attributes, Kubernetes provides [labels](/docs/conc
 
 {{< glossary_definition term_id="name" length="all" >}}
 
+{{< note >}}
+In cases when objects represent a physical entity, like a Node representing a physical host, when the host is re-created under the same name without deleting and re-creating the Node, Kubernetes treats the new host as the old one, which may lead to inconsistencies.
+{{< /note >}}
+
 Below are three types of commonly used name constraints for resources.
 
 ### DNS Subdomain Names
@@ -86,4 +90,3 @@ UUIDs are standardized as ISO/IEC 9834-8 and as ITU-T X.667.
 
 * Read about [labels](/docs/concepts/overview/working-with-objects/labels/) in Kubernetes.
 * See the [Identifiers and Names in Kubernetes](https://git.k8s.io/community/contributors/design-proposals/architecture/identifiers.md) design document.
-