Proxmox OpenVE looks the closest to a VMCenter/VMSphere alternative based purely on Linux (Debian to be more precise). You can add pure virtualized environments a la VMware guests, or run container based Linux(-only) guests. It comes with a cluster option with live migration possibilities.
Two disadvantages on first sight :
- It's 64bit only
- It comes only in the form of an appliance-based installation (which will wipe your /dev/sda)
Apart from that, very promising.
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Ganeti
Somehow related, did you have a look at Ganeti?
http://code.google.com/p/ganeti/
A Google project where they integrated vm clusters with drbd. Used by Google internally.
openVE also drbd
In reply to Ganeti by Serge van Gind…
OpenVE also uses DRBD, it seems
32bit possible
You can install it unofficially on 32bit HW
LWN article
Here's an LWN article about Proxmox which goes into more detail.
OpenNode
Just wanted to mention OpenNode... which just recently had their first public release. What is OpenNode? It aims to be similar to Proxmox VE but based on CentOS.
In the beta release they have the installer done and it has the following features from my memory so check out their site if desired:
Their next release will include a modern (Web 2.0 / Ajax-based) web-based management system.
So far as I can tell you can drop to shell and use vzctl for OpenVZ container management and virsh / virt-manager for KVM machine management.
Fairly functional for a first release.