this post was submitted on 31 Jul 2024

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Immutable backup for important data (sh.itjust.works)

submitted 4 months ago by [email protected] to c/[email protected]

21 comments fedilink hide all child comments

Hello,

I am looking for recommendations for a service provider of immutable backup that has options for a homelab user.

My research has led me to services with expensive options, or no pricing at all unless you ask for a quote.

Thank you

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[–] [email protected] 10 points 4 months ago* (last edited 4 months ago) (1 children)

How immutable do you need?

S3 offers a flag that prevents modification or deletion for a set period, and afaik basically every S3-compatible provider offers that.

I use that along with a lifecycle rule to maintain my backup buckets on iDrive.

If you need a 'you cannot touch this and the provider has no way of allowing it' then you're talking specialized corporate talk-to-a-sales-person-for-a-quote, as you found out.

Edit: if you don't need cloud, there's options for WORM media from the humble BluRay to fancy SSDs that don't allow deletion.

[–] [email protected] 3 points 4 months ago (1 children)

My goal is that if for whatever reason, my homelab is compromised, I will be able to at least restore my important data.

If i can modify the data on the other end, but cannot from my proxmox, then its fine.

I would like a offsite solution in the future, but for now it's going to be a cloud for data blob only.

[–] [email protected] 2 points 4 months ago (1 children)

Borg backup?

[–] [email protected] 1 points 4 months ago (1 children)

Never heard of it, but I will look into it. Thanks

[–] [email protected] 2 points 4 months ago (1 children)

Borg append only seems like the way to do this easily

[–] [email protected] 1 points 4 months ago

restic can run append-only, too. It's more about the remote not allowing deletions.

[–] [email protected] 9 points 4 months ago (1 children)

BorgBase allows for append-only backups.

[–] [email protected] 4 points 4 months ago

Thanks, from another link in this thread, Borg seems to have wrapper options as a complement to its features.

[–] [email protected] 7 points 4 months ago (1 children)

I use Backblaze B2, but stored in an encrypted Restic container, set up using this guide:

https://helgeklein.com/blog/restic-encrypted-offsite-backup-with-ransomware-protection-for-your-homeserver/

Restic has been great for automating backups, and even letting me mount the encrypted storage to grab individual files. I like doing it this way since I don't have to trust Backblaze isn't reading my data - I know for sure that they can't.

Performance of storage that is both remote and encrypted is about what you would expect, but I don't need access to the data unless something bad happens.

[–] [email protected] 1 points 4 months ago

Thats a great link, it lists a lot of options and gives a good explanation on how to setup the author's choices.

[–] [email protected] 3 points 4 months ago* (last edited 4 months ago) (2 children)

Backblaze B2 has the option: https://www.backblaze.com/docs/cloud-storage-object-lock

Cheap storage too.

[–] [email protected] 1 points 4 months ago (1 children)

Thanks for the information, I will look into that.

[–] [email protected] 3 points 4 months ago (1 children)

I use backblaze storage with Kopia, which supports using object lock. Every time a backup is made the objects for it are locked for a configurable amount of time. I use 30 days, so an attacker would have to compromise my backup software for a month before being able to erase my backups.

[–] [email protected] 1 points 4 months ago (1 children)

I like the thought of having timed backups to keep the costs lower by pruning the olds backups.

[–] [email protected] 2 points 4 months ago

Also only differences are stored, so if your files don’t change much each backup costs very little. I keep hundreds of backups for the previous year of changes, and it uses less than double the amount of storage the files take up. You can also enable compression, which I do, so it’s even smaller.

[–] [email protected] 1 points 4 months ago

I use B2 for my backups with object lock on

[–] [email protected] 2 points 4 months ago (1 children)

How much data are we talking about?

A free mega.nz account should be fine for everything except family fotos and legally obtained music/movies.

[–] [email protected] 1 points 4 months ago

Photos was part of my plan, so mega.nz isn't an option. Thanks for the suggestion though.

[–] [email protected] 2 points 4 months ago (1 children)

Restic or Borg on your side, a safe and remote destination on the other side.

use restic, with backrest web GUI, and cannot be happier.

As for remote site, I use a remote machine I rent, but there are plenty of providers around, shop a bit... Or find a friend for reciprocal backup?

[–] [email protected] 1 points 4 months ago (1 children)

My plan is to build a second server that I will leave at my inlaws' house and use that, but for now, I will rent a cloud while this happens.

[–] [email protected] 1 points 4 months ago

Thats perfect