Merge pull request #20622 from davivcgarcia/feature-15123

Clarify minimum cluster resource requirement for tasks

Author: k8s-ci-robot

content/en/docs/tasks/administer-cluster/manage-resources/cpu-constraint-namespace.md

@@ -20,7 +20,7 @@ in the namespace.
 
 {{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
 
-Each node in your cluster must have at least 1 CPU.
+Your cluster must have at least 1 CPU available for use to run the task examples.
 
 {{% /capture %}}
 
@@ -204,11 +204,7 @@ Because your Container did not specify its own CPU request and limit, it was giv
 [default CPU request and limit](/docs/tasks/administer-cluster/cpu-default-namespace/)
 from the LimitRange.
 
-At this point, your Container might be running or it might not be running. Recall that a prerequisite
-for this task is that your Nodes have at least 1 CPU. If each of your Nodes has only
-1 CPU, then there might not be enough allocatable CPU on any Node to accommodate a request
-of 800 millicpu. If you happen to be using Nodes with 2 CPU, then you probably have
-enough CPU to accommodate the 800 millicpu request.
+At this point, your Container might be running or it might not be running. Recall that a prerequisite for this task is that your cluster must have at least 1 CPU available for use. If each of your Nodes has only 1 CPU, then there might not be enough allocatable CPU on any Node to accommodate a request of 800 millicpu. If you happen to be using Nodes with 2 CPU, then you probably have enough CPU to accommodate the 800 millicpu request.
 
 Delete your Pod:
 

content/en/docs/tasks/configure-pod-container/assign-cpu-resource.md

@@ -18,7 +18,7 @@ allocated as much CPU as it requests.
 
 {{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
 
-Each node in your cluster must have at least 1 CPU.
+Your cluster must have at least 1 CPU available for use to run the task examples.
 
 A few of the steps on this page require you to run the
 [metrics-server](https://github.com/kubernetes-incubator/metrics-server)
@@ -122,9 +122,7 @@ Recall that by setting `-cpu "2"`, you configured the Container to attempt to us
 
 {{< note >}}
 Another possible explanation for the CPU use being below 1.0 is that the Node might not have
-enough CPU resources available. Recall that the prerequisites for this exercise require each of
-your Nodes to have at least 1 CPU. If your Container runs on a Node that has only 1 CPU, the Container
-cannot use more than 1 CPU regardless of the CPU limit specified for the Container.
+enough CPU resources available. Recall that the prerequisites for this exercise require your cluster to have at least 1 CPU available for use. If your Container runs on a Node that has only 1 CPU, the Container cannot use more than 1 CPU regardless of the CPU limit specified for the Container.
 {{< /note >}}
 
 ## CPU units