AWS Certified CloudOps Engineer - Associate
ASG Lifecycle Hooks and Instance Refresh
The states an instance passes through inside an Auto Scaling group, the lifecycle hooks that pause it at launch and termination, warm pools for slow boots, and how instance refresh rolls a new AMI across the fleet without dropping capacity.
Advanced 27 minutes 5 Learning Objectives
- Trace an instance through the Auto Scaling group lifecycle states, including the wait states a lifecycle hook creates
- Configure a lifecycle hook with the right timeout and default result for a launch or termination action
- Decide when a warm pool is justified and which instance state to keep the pool in
- Use standby and detach to work on an instance without the group replacing it
- Set minimum and maximum healthy percentages for an instance refresh to get the replacement behavior you need