The topic title is a bit unclear, please let me describe my situation:
I have a bunch of client sites, each with its own domain running on many server instances, each with its own IP address. From time to to time I need to move 1 site from 1 server to another server, and I don’t want to disrupt the site’s operation, I also don’t want to ask the client to update the DNS manually (they are low tech).
I see Shopify uses a fixed address, and they ask all the clients to point the A record to that address. I assume they will do some kind of traffic routing on that?
I’m unsure if Cloudflare offers some service that can be used for this, or should I look somewhere else?