[EN] update Cluster (#3492)

Signed-off-by: Noah Ispas (iamNoah1) <noahispas@gmail.com> Signed-off-by: Noah Ispas <Noahispas@gmail.com> Signed-off-by: Nate W <natew@cncf.io> Co-authored-by: Nate W <natew@cncf.io>

Author: iamNoah1

content/en/cluster.md

@@ -2,18 +2,17 @@
 title: Cluster
 status: Completed
 category: Concept
-tags: ["infrastructure", "fundamental", ""]
+tags: ["infrastructure", "fundamental", "architecture"]
 ---
 
-A cluster is a group of computers or applications that work together towards a common goal. 
-In the context of cloud native computing, the term is most often applied to [Kubernetes](/kubernetes/). 
-A Kubernetes cluster is a set of services (or workloads) that run in their own containers, usually on different machines. 
-The collection of all these [containerized](/containerization/) services, connected over a network, represent a cluster.
+A cluster is a group of computers or applications called [nodes](/nodes/) that work together towards a common goal.
+In cloud native computing, the term is often applied when talking about a [Kubernetes](/kubernetes/) cluster.
+It can be seen as a specific kind of [distributed system](/distributed-systems/) where the nodes are a bit more tightly coupled.
 
 ## Problem it addresses 
 
-Software that runs on a single computer presents a single point of failure 
-— if that computer crashes, or someone accidentally unplugs the power cable, 
+Software that runs on a single computer presents a single point of failure — 
+if that computer crashes, or someone accidentally unplugs the power cable, 
 then some business-critical system may be taken offline. 
 That's why modern software is generally built as [distributed applications](/distributed-apps/), grouped together as clusters. 
 

content/en/distributed-systems.md

@@ -2,7 +2,7 @@
 title: Distributed System
 status: Completed
 category: concept
-tags: ["architecture", "", ""]
+tags: ["architecture", "infrastructure", "fundamental"]
 ---
 
 A distributed system is a collection of autonomous computing elements 
@@ -28,4 +28,5 @@ This can be automated allowing a system to handle a sudden increase in workload
 
 A non-distributed system exposes itself to risks of failure because if one machine fails, the entire system fails. 
 A distributed system can be designed in such a way that, 
-even if some machines go down, the overall system can still keep working to produce the same result.
+even if some machines go down, 
+the overall system can still keep working to produce the same result.

content/en/nodes.md

@@ -2,14 +2,15 @@
 title: Nodes
 status: Completed
 category: Concept
-tags: ["infrastructure", "fundamental", ""]
+tags: ["infrastructure", "fundamental", "architecture"]
 ---
 
 A node is a computer that works in concert with other computers, or nodes, to accomplish a common task. 
 Take your laptop, modem, and printer, for example. 
 They are all connected over your wifi network communicating and collaborating, each representing one node. 
 In [cloud computing](/cloud-computing/), a node can be a physical computer, 
-a virtual computer, referred to as a [VM](/virtual-machine/), or even a [container](/container/).
+a virtual computer, referred to as a [VM](/virtual-machine/), 
+or even a [container](/container/).
 
 ## Problem it addresses
 
@@ -22,5 +23,4 @@ Thus, nodes run apps or processes as part of a group forming a [cluster](/cluste
 
 A node gives you a distinct unit of compute (memory, CPU, network) that you can assign to a cluster. 
 In a [cloud native](/cloud-native-tech/) platform or app a node represents a single unit that can perform work. 
-Ideally, individual nodes are undifferentiated in that 
-any one node of a particular type is indistinguishable from any other node of the same type.
+Ideally, individual nodes are undifferentiated in that any one node of a particular type is indistinguishable from any other node of the same type.