When it comes to using Auto Scaling for your application, a common question is “How can we configure an instance with our application and its dependencies, and make it ready to serve traffic?”
To answer this question, we can turn to lifecycle hooks.
Lifecycle hooks are powerful, because they let us pause the creation (or termination) of an instance so that we can sneak in and perform custom actions. We can, for example:
- Download required files
- Configure the instance
- Perform any other step required to make the instance ready