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Backups: Am I doing this right? (lemmy.zip)

submitted 21 hours ago by [email protected] to c/[email protected]

20 comments fedilink hide all child comments

I'm in the process of setting up backups for my home server, and I feel like I'm swimming upstream. It makes me think I'm just taking the wrong approach.

I'm on a shoestring budget at the moment, so I won't really be able to implement a 3-2-1 strategy just yet. I figure the most bang for my buck right now is to set up off-site backups to a cloud provider. I first decided to do a full-system backup in the hopes I could just restore it and immediately be up and running again. I've seen a lot of comments saying this is the wrong approach, although I haven't seen anyone outline exactly why.

I then decided I would instead cherry-pick my backup locations instead. Then I started reading about backing up databases, and it seems you can't just back up the data directory (or file in the case of SQLite) and call it good. You need to dump them first and backup the dumps.

So, now I'm configuring a docker-db-backup container to back each one of them up, finding database containers and SQLite databases and configuring a backup job for each one. Then, I hope to drop all of those dumps into a single location and back that up to the cloud. This means that, if I need to rebuild, I'll have to restore the containers' volumes, restore the backups, bring up new containers, and then restore each container's backup into the new database. It's pretty far from my initial hope of being able to restore all the files and start using the newly restored system.

Am I going down the wrong path here, or is this just the best way to do it?

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[–] [email protected] 10 points 21 hours ago (1 children)

Some clarifications :

The 3 2 1 rule applies only for the data. Not the backup, in my case I have the real/live data, then a daily snapshot in the same volume /pool and a external off-site backup

For the databases you got misleading information, you can copy the files as they are BUT you need to be sure that the database is not running (you could copy the data and n the middle of a transaction leading to some future problems) AND when you restore it, you need to restore to the exact same database version.

Using the export functionality you ensure that the data is not corrupted (the database ensure the correctness of the data) and the possibility to restore to another database version.

My suggestion, use borgbackup or any other backup system with de duplication, stop the docker to ensure no corruptions and save everything. Having a downtime of a minute every day is usually not a deal breaker for home users

[–] [email protected] 1 points 17 hours ago

Much easier than what I was trying to do. Thank you!