AWS Auto Scaling
- AWS Autoscaling group scales ec2 instances based on some resources such as
- CPU
- RAM
- I/O
- Network
- To inform the CPU or other resource information AWS uses Cloud watch
- Lets examine cloud watch for ec2 instance
- In cloud watch alarm represents the condition met
Launch Template in AWS EC2
- Refer Here for launch template
- Create a launch template with phpinfo ami and donot include key pair
Autoscaling group (ASG)
- Autoscaling group is where we define
- minimum number of instances
- maximum number of instances
- scaling rules
- we use exising launch template
- In ASG, they have desired count
- ASG’s are used in two cases
- Always to maintain same count
- Elastic i.e. scaling up or down based on rules
- lets maintain same count using ASG
- Navigate to ec2 instances
- Now play with ec2 instances by termination and eventually delete auto scaling group.
