While reading many of the blogs and posts here about self hosting, I notice that self hosters spend a lot of time searching for and migrating between VPS or backup hosting. Being a cheapskate, I have a raspberry pi with a large disk attached and leave it at a relative’s house. I’ll rsync my backup drive to it nightly. The problem is when something happens, I have to walk them through a reboot or do troubleshooting over the phone or worse, wait until a holiday when we all meet.
What would a solution look like for a bunch of random tech nerds who happen to live near each other to cross host each other’s offsite backups? How would you secure it, support it or make it resilient to bad actors? Do you think it could work? What are the drawbacks?
You could use kopia for this (but you would need to schedule cron jobs or something similar to do it).
The way this works with kopia… You configure your backups to a particular location, then in-between runs there’s a sync command you can use to copy the backup repository to other locations.
Kopia also has the ability to check a repository for bad blobs via its verify function (so you can make sure the backups stored are actually at least X% viable).
Using zerotier or tailscale (for this probably tailscale because of the multithreading) would let you all create a virtual network between the devices that lets them directly talk to each other. That would allow you to use kopia’s sync functionality with devices in their homes.