[Xen-users] How to make network storage high available?

[Dominik Klein <dk@xxxxxxxxxxxxxxxx>]

Hello xen-users

I have a test setup with 2 xen-hosts and 1 storage host which works 
nicely. Block devices are exported from the storage host using open 
iscsi, migration works.
So far so good.

Now storage is a single point of failure and I want to avoid such.

I read a lot on the mailing list archives and all solutions I found 
about how to make storage high available consist of at least 3-5 
components like GFS, ocfs2, iscsi, LVM, CLVM, lustre, DRBD, heartbeat 
and so on. The list of possibilities seems almost endless and each one 
is quite a challenge not only to set up, even more to handle later on.
What I would like to know is how people really use Xen guests on network 
storage and how they make storage high available. Any "easier" setups?
I am aware that this is somewhat asking for a lot without seeming to 
want to do a lot for it, but I thought that asking couldn't mind.
I like things simple and the setups I found in tutorials seem very 
complex to handle. They may work out of the box from such a tutorial, 
but what to do when something fails? So that's kind of why I ask.
Regards
Dominik

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