AWS Classroom Series – 04/Dec/2020

EC2 AutoScaling group and a loadbalancer

• Lets create an ami with game of life(tomcat based application) and stress tool

sudo apt update
sudo apt install openjdk-8-jdk tomcat8 stress -y
sudo -i
cd /var/lib/tomcat8/webapps
wget https://referenceappkhaja.s3-us-west-2.amazonaws.com/gameoflife.war

• Verify if the application is working or not and create an image
• Now lets create an auto scaling group:
  • Auto scaling group gives us capability to automatically scale up (increase vms) or scale down (decrease vms) depending on Virtual Machine(EC2) metrics
• Creating an autoscaling creates ec2 instances, but we need to understand
  • Capacity:
    • Desired Capacity
    • min capacity
    • max capactity
  • Launch Template
  • Launch Configuration
  • Scaling Policy
  • Loadbalancers
• Lets look at a scenario (multi-region deployment) and try to realize this after we conceptually understand autoscaling & loadbalancing