Setup backup server
This role configures backup server(s) in the
borg-backup-server group to accept backups from remote
hosts.
Note that the borg-backup role must have run on each
host in the borg-backup group before this role. That role
will create a borg_user tuple in the hostvars for for each
host consisting of the required username and public key.
Each required user gets a separate home directory in
/opt/backups. Their authorized_keys file is
configured with the public key to allow the remote host to log in and
only run borg in server mode.
Role Variables