Btrfs snapshot backup utility

• Push/pull support via SSH
• Retention
• Email notifications
• Compression of transferred data
• Syslog logging

The following packages have to be available on both source and destination

• btrfs-progs

The system executing btrfs-backup requires

• python3

• ssh (for remote push/pull, not required for local operation)
• lzop (for compression support if desired)
• pv (provides progress indication if installed)
• sendmail (for email notifications if desired)

• when using ssh, public/private key authentication should be set up

• the destination filesystem has to be mounted without the subvol option, otherwise an error will occur on btrfs receive prompting you to remount with fs tree
• some commands (like update) may not be available for backup jobs created with older versions of btrfs-sxbackup. in this case backup jobs can be recreated using destroy and init. existing snapshots will be kept as long as destroy is not invoked with --purge.

Initialize a backup job pulling snapshots of subvolume / on remote host myhost.org to local subvolume /backup/myhost

Initialize a backup job pushing snapshots of local subvolume / to remote subvolume /backup/myhost on host mybackupserver.org

Run a backup job

Cronjob performing a pull backup job

• Fixed retention breakage which could occur when first/earliest expression kept 1 backup per interval

• Python 3.3 compatibility fixes
• Added proper support for relative paths passed to init

• New command line interface
• Source container subvolume path is now .sxbackup relative to the source subvolume and cannot be customized anylonger
• Backups created with older versions are still supported. If you customized the source container subvolume, this will still work, but it's recommended to rename it to the new default (.sxbackup) and update source and destination configuration files (.btrfs-sxbackup) accordingly