Almost exactly two years ago, I released the first tutorial for building an HA platform for KVM VMs. In that time, I have learned a lot, created some tools to simplify management and refined the design to handle corner-cases seen in the field. Today, the culmination of that learning is summed up in the "2nd Edition" of that tutorial, now called "AN!Cluster Tutorial 2". https://alteeve.ca/w/AN!Cluster_Tutorial_2 These HA KVM platforms have been in production for over two years now in facilities all over the world; Universities, municipal governments, corporate DCs, manufacturing facilities, etc. I've gotten wonderful feedback from users and all that real-world experience has been integrated into this new tutorial. As always, everything is 100% open source and free-as-in-beer! The major changes are: * SELinux and iptables are enabled and used. * Numerous slight changes made to the OS and cluster stack configuration to provide better corner-case fault handling. * Architecture refinements; ** Redundant PSUs, UPSes and fence methods emphasized. ** Monitoring multiple UPSes added via modified apcupsd ** Detailed monitoring of LSI-based RAID controllers and drives ** Discussion on hardware considerations for VM performance based on anticipated work loads * Naming convention changes to support the new AN!CDB dashboard ** New alert system covered with fault and notable event alerting * Wider array of guest OSes are covered; ** Windows 7 ** Windows 8 ** Windows 2008 R2 ** Windows 2012 ** Solaris 11 ** FreeBSD 9 ** RHEL 6 ** SLES 11 Beyond that, the formatting of the tutorial itself has been slightly modified. I do think it is the easiest to follow tutorial I have yet been able to produce. I am very proud of this one! :D As always, feedback is always very much appreciated. Everything from typos/grammar mistakes, functional problems or anything else is very valuable. I take all the feedback I get and use it to helping make the tutorials better. Enjoy! Digimer, who now can now start the next tutorial in earnest! 1. https://alteeve.ca/w/AN!CDB -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education?