Manually scaling an application

k8ManualScale.sh

#!/bin/bash
#Manually scaling an application (can also be done through yaml changes)

#Nginx deployment yaml created in previous script
kubectl create -f nginx-deployment.yaml

#Detailed status of nginx deployment
kubectl describe deployment nginx-deployment

#Scale deployment to 3 replicas
kubectl scale deployment/nginx-deployment --replicas=3

#Check status of nginx deployment after scaling
kubectl get deployments

#Check status of pods; including replicas
kubectl get pods

#Scale deployment to 1 replicas
kubectl scale deployment/nginx-deployment --replicas=1

#Check status of pods; including replicas
kubectl get pods

#Scale deployment to 2 replicas
kubectl scale deployment/nginx-deployment --replicas=2

#Check status of pods; including replicas
kubectl get pods