Overview

The Backup role provides storage space for websites backups. These backups take place over ssh on the default SSH port (22). You must have public key authentication enabled in your sshd_config - this is the default on Ubuntu. Password authentication and root login are not required and can be disabled. If your backup server has a hardware firewall, it must permit port 22 TCP from every server in your cluster.

Website backups are stored incrementally using hard links to save space. The latest backup is referenced by a symlink with the name current.

TIP

We recommend installing the backup role on a completely separate server to your web servers and hosting it in a different data centre