This is just a quick reminder for myself on how to restore a btrfs Snapshot on Nextcloudpi.
Our setup is the following:
- Raspberry pi 4b+ 8gb,
- 2x2tb hard drive connected via usb (They reside in a usbdock)
- 32gb microsd card
Nextcloud for raspberry pi from https://github.com/nextcloud/nextcloudpi/releases/
Name of hard drives (mounted to /media):
- NextcloudHDD1 (The data directory and database directory)
- NextcloudHDDBackUp (Backup for the btrfs snapshots, and ncp config)
This configuration assumes that the nextcloudpi installation is broken and the first hard drive NextcloudHDD1 is still working.
Steps to take: First, setup a new Nextcloudpi installation. Then restore ncp config from NextcloudHDD1. Then (?)
- Nc-restore
- Create a read-only snapshot:
btrfs subvolume snapshot -r /media/NextcloudHDDBackpu/snapshots/name_of_snapshot /media/NextcloudHDDBackpu/snapshots/data-ro
-
Delete data on NextcloudHDD1
-
Copy the snapshot:
btrfs send /media/NextcloudHDDBackpu/snapshots/data-ro| btrfs receive /media/NextcloudHDD1
- Make snapshot Read write Snapshot
btrfs subvolume snapshot /media/NextcloudHDD1/data-ro /media/NextcloudHDD1/data
- Turn maintenance mode off from web ui
- Scan for the files
sudo -u www-data php /var/www/nextcloud/occ files:scan --all
Some notes:
Btrfs subvolume snapshot move etc. https://www.reddit.com/r/btrfs/comments/qfcmpe/moving_subvolume_to_different_drive/ scan for the files https://help.nextcloud.com/t/files-and-directories-not-displaying-solved/12865 general manual for backup and restore https://help.nextcloud.com/t/how-to-backup-and-restore-using-nc-snapshot/126377
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The logfile of Nextcloud is located in the data directory /var/www/nextcloud/data/nextcloud.log.
/etc/cron.d/ncp-snapsync-auto Htop display cpu ram