I use limevirtual.com (and related domain names such as limedns.com, lime2.com and lime2.co.uk) for testing and customising open source software, particularly for high availability and load balancing, both out of personal interest and for my day job as a Senior Systems Administrator at DediPower.
Technologies currently in use include GNU/Linux (Debian and Red Hat/CentOS), KVM and Xen (virtualisation), Apache (web serving), MySQL (databases), BIND (DNS), HAProxy (load balancing), Postfix + Dovecot + GlusterFS (redundant mail services), tinc (mesh VPN between hosts), as well as a large number of custom Perl scripts for automated management, DNS-based failover, and service monitoring and recovery, all spread across three VM hosts and a number of additional VMs in geographically diverse locations. In addition, other technologies come and go on an almost daily basis as I encounter them at or outside work.
If you are visiting this page, most likely you have followed a link from a site or service on one of my hosts. Most services are closed off from public access, and all are non-commercial, but if you have reason to request more information, please send me an email.
David Joy
2 September 2010