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Proxying

Overview

Sometimes, you may want to produce backup data on a remote host or store backup data to a remote host while still keeping uback configuration on a third host. For example, you may want to use a btrfs source on a remote host to produce the backup but store it locally on a fs destination, or use a tar source locally and use a fs destination on another host. You may combine both requirements, and on host A get a backup from a btrfs source from host B and store it in a fs destination on host C.

Proxying means using another uback process to provide the source and/or the destination while doing a backup. The other uback process may run on another user, or in a container, or a remote host.

Note that encryption and compression is done on the local process (not the remote one). Also, restoring with proxy is not supported ; you must use a direct source.

Usage

For both sources and destinations :

  1. Use proxy as a source or destination type.

  2. Spawn the other uback instance by setting the command option to uback proxy.

  3. Specify the proxyfied type and/or command option by prefixying it with proxy-.

Examples

Proxy a custom destination using ssh :

type=proxy,command="ssh root@example.com uback proxy",proxy-type=command,proxy-command=uback-custom-dest

Proxy a btrfs source using sudo :

type=proxy,command="sudo uback proxy",proxy-type=btrfs