Regular backup Nextcloud server running with NCP (NextcloudPi) using kopia and Storj cloud storage

Some scripts to backup your local nextcloud instance running on a Raspberry Pi (or alike) with nextcloudpi.

Requirements

This scripts uses:

• the wonderful kopia for backup (end-to-end encrypted, incremental, de-dup (using hashes and splitting to save only changed parts of large files), compressed, fast!)
• optional: use zstd to compress DB dumps (gzip otherwise)
• save backup to Storj cloud storage (but you could connect to another kopia repository if you want, of course. *However, Storj currently offers 150 GB for free and is cheaper than all other providers I found. And I like the idea of the distributed approach with open source software that anyone can use and sign up to host another Storj node. I don't really understand the details of 'erasure codes' as redundancy approach 🤔, but it sounds to me like someone really thought in depth about this... 🫣)

Installation

• the files in this repo should be checked out to /home/kopia as some paths are hardcoded...
• create your kopia repository, e.g. at Storj
• connect to the kopia repository, e.g. using storj-connect-repo.sh
  • in this case you should write your .env file containing your credentials
• NOTE: currently you need to adjust the paths in kopia-run-backup.sh
• setup and enable systemd timers by running setup-systemd.sh

Usage

The timers run the kopia-run-backup.sh as root (which you also could run manually). No user interaction is required.

The script supports two modes: normal (executed every 4 hours) and full (daily).

Normal Backup

This will backup

• compressed mysql DB dump (using zstd if available, gzip otherwise)
• nextcloud's data dir, containing all files
• the backup setup at /home/kopia
• complete system backup including the nextcloud from /

Full Backup

In addition to the normal backup, this

• sets nextcloud's maintenance mode to avoid any action to produce an inconsistent state
• shutdown mysql and snapshot the DB directory (and restart mysql afterwards)
• restore maintenance mode to what it was before

Sample .env

bucket=kopia
access-key=... your credentials from Storj...
secret-access-key=... your credentials from Storj...