btrbackup

Utilize btrfs read-only snapshot capability to provide agentless compact backups to directories and databases.
All the heavy work is being done by rsync via ssh access.

Server-side requirements

• ssh configured to access clients with pubkey
• rsync
• btrfs-progs
• btrfs mountpoint with enough space to hold all the backup data (use compress mount option to save space)
• archiver of your choice for sql dump files (gzip, bzip2, xz, zstd, etc..)

Client-side requirements

• sshd running and configured pubkey access for the server-side
• rsync
• mysqldump/mariadb-dump for database backups