snapdisk

snapdisk is a user-mode utility that allows creating snapshots of block-devices in pieced chunks with deduplication. Effectively, it can be used to create backups of block devices. It is currently under development and may not have all functionality implemented fully.

Usage

snapdisk has multiple facilities, as seen in the help page:

Syntax: ./snapdisk.py [command] [options]

Available commands:
    snapshot           Create a snapshot of a block device
    serve              Start a snapshot server that serves an image
    genkey             Generates a server and client key for use with TLS

Options vary from command to command. To receive further info, type
    ./snapdisk.py [command] --help

The easiest is to create a local device block snapshot:

$ ./snapdisk.py snapshot /dev/sda1 backup-image

But when snapdisk is also installed at a peer, it can also be tunneled over ssh:

$ ./snapdisk.py snapshot ssh://root@myserver.com//dev/sda1 backup-image

Alternatively, you can start a server on the peer, e.g., over plain IP:

$ ./snapdisk.py serve -e ip://192.168.1.100 /dev/sdb5

And then, on the client side, create the backup by connecting to it:

$ ./snapdisk.py snapshot ip://192.168.1.100 backup-image-remote

Lastly, you can create TLS keypairs for client and server side:

$ ./snapdisk.py genkey server.json client.json

And then use the TLS server/client functionality. On the server using the server key:

$ ./snapdisk.py serve tls://192.168.1.100/server.json /dev/sdb9

And on the client using the client key:

$ ./snapdisk.py snapshot tls://192.168.1.100/client.json backup-image-tls

All individual commands have their own help pages and offer many options, consult them to learn more.

License

GNU GPL-3.