The BBC use the pre-baked AMIs exclusively for our deployments, we have a concept of a "bakery" which creates a full formed AMI which we then use in our launch config.
The idea being that when you do a deploy, the launch config is updated to use the new AMI ID. The old instances are terminated and the new ones popup in its place. You can play with the scaling options to set an update pause time. We can get a 0 sec downtime with this.
The idea being that when you do a deploy, the launch config is updated to use the new AMI ID. The old instances are terminated and the new ones popup in its place. You can play with the scaling options to set an update pause time. We can get a 0 sec downtime with this.