ReplicaSet wording

Author: rcastley

content/en/tko/session-5/docs/deploy-loadgen.md

@@ -1,9 +1,11 @@
 ---
 title: Deploy Load Generator
 linkTitle: Deploy Load Generator
-weight: 4
+weight: 5
 ---
 
+Now to see how the autoscaler reacts to increased load. To do this, you'll start a different Pod to act as a client. The container within the client Pod runs in an infinite loop, sending queries to the php-apache service.
+
 ## 1. Create loadgen YAML
 
 In the terminal window create a new file using (`vim` or `nano`) called `loadgen.yaml` and copy the following YAML into the file.
@@ -49,6 +51,10 @@ kubectl apply -f loadgen.yaml --namespace loadgen
 
 ## 4. Scale the load generator
 
+A ReplicaSet is a process that runs multiple instances of a Pod and keeps the specified number of Pods constant. Its purpose is to maintain the specified number of Pod instances running in a cluster at any given time to prevent users from losing access to their application when a Pod fails or is inaccessible.
+
+ReplicaSet helps bring up a new instance of a Pod when the existing one fails, scale it up when the running instances are not up to the specified number, and scale down or delete Pods if another instance with the same label is created. A ReplicaSet ensures that a specified number of Pod replicas are running continuously and helps with load-balancing in case of an increase in resource usage.
+
 ``` text
 kubectl scale deployment/loadgen --replicas 4 -n loadgen
 ```

content/en/tko/session-5/docs/setup-hpa.md

@@ -1,7 +1,7 @@
 ---
 title: Setup Horizontal Pod Autoscaler
 linkTitle: Setup HPA
-weight: 5
+weight: 4
 ---
 
 In Kubernetes, a HorizontalPodAutoscaler automatically updates a workload resource (such as a Deployment or StatefulSet), with the aim of automatically scaling the workload to match demand.