The final role in our playbook creates a launch configuration and then creates/updates an autoscaling group to finally launch our instances. It then does a tiny bit of housekeeping. To create the role, run:
$ ansible-galaxy init roles/autoscaling
First of all, there are a few default variables we need to set in roles/autoscaling/default/main.yml; these details show how many instances we want running at any one time, and also how many instances we replace at a time when doing a deployment of a new AMI:
min_size: 2max_size: 9desired_capacity: 3replace_size: 2health_check_type: ELBassign_public_ip: yesec2_instance_type: "t2.micro"
What those variables are saying is that we want three instances running at all times, so if there are ...
