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https://github.com/rubenhoenle/bergkapellen-backup
NixOS configuration for backing up a SaaS Nextcloud instance
https://github.com/rubenhoenle/bergkapellen-backup
backup linux nextcloud nixos raspberry-pi sever
Last synced: 1 day ago
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NixOS configuration for backing up a SaaS Nextcloud instance
- Host: GitHub
- URL: https://github.com/rubenhoenle/bergkapellen-backup
- Owner: rubenhoenle
- Created: 2024-11-14T23:01:17.000Z (2 months ago)
- Default Branch: main
- Last Pushed: 2024-11-16T17:34:38.000Z (2 months ago)
- Last Synced: 2025-01-20T02:55:43.219Z (4 days ago)
- Topics: backup, linux, nextcloud, nixos, raspberry-pi, sever
- Language: Nix
- Homepage:
- Size: 14.6 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Bergkapelle Nextcloud Backup configuration
This is a bare minimum config to build a NixOS Raspberry Pi SD card image which is used inside a Raspberry Pi to backup a SaaS Nextcloud instance.
Hardware setup:
* Raspberry Pi 4 with 2GB RAM
* external Hard drive
## Everything you should know
* The hard drive is formatted in `ext4` and may not be readable using a Windows machine. Just in case I leave this world and you need to access these backups, use a Linux machine to read it.
* The hard drive contains two directories:
* `synced`: This directory always contains the latest files from the Nextcloud instance. It should be synced every hour.
* `restic`: This directory contains a [restic](https://restic.net/) repository. Restic is a backup tool which supports incremental backups and deduplication. Using the restic software you should be able to jump back to the file structure of the Nextcloud from the latest
* 48 hours
* 7 days
* 4 weeks
* 12 months
* 10 years
## Rebuilding
```bash
nixos-rebuild switch --target-host root@bergkapellen-backup --flake ".#raspberry-pi_4"
```
## Helpful commands
```bash
# starting the sync job manually (should start the restic backup job automatically afterwards)
systemctl start nc-backup
# view status of the sync job
systemctl status nc-backup
# starting the restic job manually
systemctl start restic-backups-nextcloud
# view status of the restic job
systemctl status restic-backups-nextcloud
```
## Building the SD card image for a new setup
> [!NOTE]
> This might take a while and eat up some disk space on your machine.
### Prerequisites
To be able to build the SD card image on your local x86 machine, you will have to add the following lines to your nix system config.
```nix
boot.binfmt.emulatedSystems = ["aarch64-linux"];
nix.settings.extra-platforms = config.boot.binfmt.emulatedSystems;
```
### Building the image and flashing the SD card
```bash
nix build .#nixosConfigurations.raspberry-pi_4.config.system.build.sdImage
```
## Flash the ISO to the SD card
```bash
# run this before inserting the sd card
lsblk
# NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
# sda 8:0 1 0B 0 disk
# sdb 8:16 1 0B 0 disk
# now insert the SD card, then run it again
lsblk
# NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
# sda 8:0 1 0B 0 disk
# sdb 8:16 1 29,8G 0 disk
# ├─sdb1 8:17 1 256M 0 part /run/media/ruben/bootfs
# └─sdb2 8:18 1 29,6G 0 part /run/media/ruben/rootfs
# NOW WE KNOW: OUR SD CARD IS /dev/sdb
# unmount the sd card
sudo umount /dev/sdb1
sudo umount /dev/sdb2
# get the path of your iso in the nix store
# BE CAREFUL: The iso image is hidden in a subdirectory inside the nix store
ls -lisa result
# write the ISO to the SD card
sudo dd if=/nix/store/xz8hw00mpcgl1y7fd4g58x1ilnpwbjkz-nixos-sd-image-24.11.20240608.cd18e2a-aarch64-linux.img/sd-image/nixos-sd-image-24.11.20240608.cd18e2a-aarch64-linux.img of=/dev/sdb bs=1M status=progress
```