EC2 doesn't do any kind of live machine migration. The only times a machine may start on a different host is if it is stopped and then started. Even reboots don

EC2 doesn't do any kind of live machine migration. The only times a machine may start on a different host is if it is stopped and then started. Even reboots don't allow them to move. You see this a lot when AWS lets you know about maintenance on a physical host and gives you the option to avoid the automated move by doing these steps manually at a time of your choosing before the maintenance window.