Merge remote-tracking branch 'upstream/master' into dev-1.21

2021-02-26 20:30:32 -05:00
parent b709953493 7c94fc38b4
commit 65de0bda77
34 changed files with 1431 additions and 612 deletions
@@ -124,6 +124,6 @@ that can act as a [client for the Kubernetes API](/docs/reference/using-api/clie
    you implement yourself
  * using the [Operator Framework](https://operatorframework.io)
 * [Publish](https://operatorhub.io/) your operator for other people to use
-* Read [CoreOS' original article](https://coreos.com/blog/introducing-operators.html) that introduced the Operator pattern
+* Read [CoreOS' original article](https://web.archive.org/web/20170129131616/https://coreos.com/blog/introducing-operators.html) that introduced the Operator pattern (this is an archived version of the original article).
 * Read an [article](https://cloud.google.com/blog/products/containers-kubernetes/best-practices-for-building-kubernetes-operators-and-stateful-apps) from Google Cloud about best practices for building Operators

@@ -52,7 +52,10 @@ If the prefix is omitted, the label Key is presumed to be private to the user. A

 The `kubernetes.io/` and `k8s.io/` prefixes are reserved for Kubernetes core components.

-Valid label values must be 63 characters or less and must be empty or begin and end with an alphanumeric character (`[a-z0-9A-Z]`) with dashes (`-`), underscores (`_`), dots (`.`), and alphanumerics between.
+Valid label value:
+* must be 63 characters or less (cannot be empty),
+* must begin and end with an alphanumeric character (`[a-z0-9A-Z]`),
+* could contain dashes (`-`), underscores (`_`), dots (`.`), and alphanumerics between.

 For example, here's the configuration file for a Pod that has two labels `environment: production` and `app: nginx` :

@@ -58,7 +58,7 @@ Neither contention nor changes to quota will affect already created resources.
 ## Enabling Resource Quota

 Resource Quota support is enabled by default for many Kubernetes distributions.  It is
-enabled when the API server `--enable-admission-plugins=` flag has `ResourceQuota` as
+enabled when the {{< glossary_tooltip text="API server" term_id="kube-apiserver" >}} `--enable-admission-plugins=` flag has `ResourceQuota` as
 one of its arguments.

 A resource quota is enforced in a particular namespace when there is a
@@ -38,8 +38,7 @@ If a {{< glossary_tooltip term_id="node" >}} dies, the Pods scheduled to that no
 are [scheduled for deletion](#pod-garbage-collection) after a timeout period.

 Pods do not, by themselves, self-heal. If a Pod is scheduled to a
-{{< glossary_tooltip text="node" term_id="node" >}} that then fails,
-or if the scheduling operation itself fails, the Pod is deleted; likewise, a Pod won't
+{{< glossary_tooltip text="node" term_id="node" >}} that then fails, the Pod is deleted; likewise, a Pod won't
 survive an eviction due to a lack of resources or Node maintenance. Kubernetes uses a
 higher-level abstraction, called a
 {{< glossary_tooltip term_id="controller" text="controller" >}}, that handles the work of