UPDATE (June 2013): this post has been published on the RDO site and is now maintained there.

Heat provides orchestration of composite cloud applications using the CloudFormation API and templates; it is an incubated project of OpenStack. Its development cycle is to be Integrated in Havana and follow the full OpenStack release process. I want to go trough the steps needed to install and configure it as the official documentation is still scarce on the …

I've finally built my first cluster on rhel5 using gfs2 and drbd8 :-D

drbd makes a network raid1 between two physical distinguished block devices (eg. internal disks of two servers) and from the release 8.0 it supports the active/active configuration.

gfs2 permits to the two server machines a concurrent mount of the network replicated drbd device.

rhel5 is the OS I've installed on the two machines.

Practically with this stuff the servers share …