[one-users] Front-End node

[Steven Timm]

OpenNebula Frontend in a VM It can be done, but how well it performs 
depends on what data store you 
are using.  We do it in our development OpenNebula cloud but not
in production yet because we are using a shared image store with
GFS2 and CLVM and it is difficult with our current situation to
get a VM to be a member of a cluster like that, particularly since
our fibre channel host bus adapters don't support pass-through.
We are exploring other options for our data store as we migrate to
OpenNebula 4 series so we can make it work more smoothly.

With NFS data store or ssh-based data store I expect you would not
have any problems.

So right now in the meantime our high availability OpenNebula head nodes 
run on bare metal, in an active-passive configuration, 
using Red Hat Clustering to manage the high availability of the service.
HA is not perfect--if one head node goes down while a VM operation is in 
progress, the other one will not pick it up, but it's good enough for
most thiings.

There was a High Availability guide recently published.

http://opennebula.org/documentation:archives:rel4.2:oneha

We were doing most of this stuff in version 3 before it was formalized in 
the guide.

Steve Timm


On Tue, 17 Dec 2013, Giancarlo De Filippis wrote:

> 
> Hi all,
> 
> i'd know if the front-end node can be installed in a VM (in HA mode) onto a compute-node?
> 
> If yes .... there is some docs?
> 
> Thanks to all.....
> 
> 
>

------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Scientific Computing Division, Scientific Computing Services Quad.
Grid and Cloud Services Dept., Associate Dept. Head for Cloud Computing