[Xen-users] Best Practice and Documentation for Xen 4.2 using LibXL

[Virtually Mad <grant.waters@xxxxxxxxx>]

Hi,

I'm getting back in to Xen after a little while out of the game.  It seems
things have moved on quite a bit while I was away!

I remember using "xm list" and "xm migrate --live" etc to manage my VMs but
I recently took a look at what I believe to be the latest stable release
(Xen 4.2) and found that xm is deprecated and I should be using xl instead. 
When I try and do things with xl it seems to conflict with xend.  Sorry I
can't be more specific -my test setup is a bit of a mess now.
It seems that whenever I google for a Howto or Faq it invariably shows me
the xm way of doing things, and the documentation on Xen 4.2 seems to be not
as comprehensive as Xen 3 was.
Can anyone point me to a definitive guide for Best Practice with Xen 4.2
running Centos 6, e.g. examples of tried and tested config files which work
out of the box so I can create my VMs straight away.

As a minimum what I need to do is get to the point where I can easily do the
following:

create a VM using a config file which defines its name,ram,cpus,etc, and
points to an LVM partition i've just created, and builds Centos from an ISO
I have on the Dom0.

I have managed to get this working partially using virt-install but that
seems to use XML config and not the XL-style configs.

When I build a config file using the examples at 
http://xenbits.xen.org/docs/unstable/man/xl.cfg.5.html and 
http://xenbits.xen.org/docs/4.3-testing/misc/xl-disk-configuration.txt 
I get nowhere when I try "xl create <my-config-file>".  It says it is
building the VM then I just get a couple of DEBUG messages and the VM
disappears.

I just need to understand the best toolset and config combination to use
because from what I have done so far this is not looking like a stable
enough environment for production.

Hope someone can help.

Regards,
GW








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