How do you manage multiple machines in different locations. The use case is something like this, i want self hosted different apps in different locations as redundancy. Something like i put one server in my house, one in my dad’s house, couple other in my siblings/friends house. So just in case say machine in my house down or internet down. It can fallback to the other machines. I was thinking using docker swarm on multiple raspberry pis. But opening port on router seems not secure at all. How do i connect those machine together? Should i put wireguard on server # 1 and other servers will connect to that server. But if the network/machine failed on thar server; everything else will not work.
You could use HAProxy on the client side to load balance apps in multiple locations, but it really depends on the application.
I like to manage my software with Ansible but Docker stack files might make it simple enough for you.