AWS Application Load Balancer with Autoscaling group

Launch Application Load Balancer (ELB) with Autoscaling group

1. Create a Application Load Balancer
- In the wizard, also create Target group but do not add any
instances
2. Create an Autoscaling Group
- Minimum size 2, Max 4, Desired 2
3. Create Launch Configuration.
- Make sure you add userdata (see below) to download and install website
- Associate Target group with Autoscaling group
- Associate ELB health check
- Set autoscaling policy on Average CPU greater than 20%.
Configure email notification.
- Confirm email subscription.
4. Wait for instances to be running.
- See if you are able to access your Web Application using Load
balancer DNS
- Increase the load on web servers
- Login to any of the EC2 over ssh (Make sure 22 port is open)
- Install stress: sudo yum install stress -y
5. Increase system load: stress --cpu 8 --timeout 3000
6. Wait for 5 mins and see if scaling activities happen

Userdata:
#!/bin/bash
yum install httpd -y
service httpd start
chkconfig httpd on

wget http://chetan-demo.s3-us-west-2.amazonaws.com/awstrainingcenter.com.zip
unzip awstrainingcenter.com.zip
cp -r awstrainingcenter.com/* -d /var/www/html/
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Видео AWS Application Load Balancer with Autoscaling group канала AWS Training Center