There are two parts to unifying around EC2 instance IDs: systemd machine ID and etcd peer/member IDs. Switching etcd should be as simple as setting the ETCD_NAME environment variable in a drop-in, but I don't have any clue what will be involved to switch the systemd machine ID (or if it is even feasible).
There are two parts to unifying around EC2 instance IDs:
systemdmachine ID andetcdpeer/member IDs. Switchingetcdshould be as simple as setting theETCD_NAMEenvironment variable in a drop-in, but I don't have any clue what will be involved to switch thesystemdmachine ID (or if it is even feasible).