Any number of remote web servers may be configured. They need an aegir user and webserver configuration, with the same user name and directory paths. SSH public/private keys should be set up so hostmaster's Aegir user can access remote web Aegir users with no passwords. The above Apache configuration needs to be performed too.
Additionally, the remote web server needs the 'mysql' client binary installed so that Aegir can test that it can successfully connect to the database server. On (at least) Debian-based systems, this can be installed via the 'mysql-client' package.
They will also need a login shell, which can be modified using the
Shell commands as root::
apt-get install mysql-client adduser --system --group --home /var/aegir aegir adduser aegir www-data #make aegir a user of group www-data chsh -s /bin/sh aegir apt-get install rsync apache2 php5 php5-cli php5-mysql mkdir /var/aegir/.ssh cat > /var/aegir/.ssh/authorized_keys <<EOF ssh-rsa AAAAB3NzaC1yc2EAAAADAQAB...UF aegir@filer01 EOF chown aegir:aegir /var/aegir/.ssh -R chmod 750 /var/aegir/.ssh chmod 640 /var/aegir/.ssh/authorized_keys a2enmod rewrite ln -s /var/aegir/config/apache.conf /etc/apache2/conf.d/aegir.conf cat > /etc/sudoers.d/aegir <<EOF Defaults:aegir !requiretty aegir ALL=NOPASSWD: /usr/sbin/apache2ctl EOF chmod 440 /etc/sudoers.d/aegir
For clusters, use the aegir-cluster-slave package to operate the above and NFS mounts for you. See also web cluster configuration documentation.