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Re: [Xen-devel] EL6 initscript feedback.

On Tue, 21 May 2013 21:30:27 +1000, Steven Haigh <netwiz@xxxxxxxxx> wrote:
On 05/21/2013 09:20 PM, Stefano Stabellini wrote:
On Tue, 21 May 2013, Steven Haigh wrote:
Hi all,

I'm throwing in my initscript here that I've been pushing to autostart xen
domains on system boot.

There are at least one issue right now that I'm not 100% sure how to handle - and that is domains created by libvirt. These continue to show in an xm/xl list output even when they are not paused / running / blocked - causing my
initscript to think they are still running.

The ways I can think of detecting this are *very* hacky and I wouldn't feel
comfortable to including them in widely used packages.

I'm wondering if people have some spare time that they review the logic in this initscript and provide feedback / suggestions / fixes / improvements that
I can roll into the scripts to enhance them for all.

Is it actually a good idea to mix and match different toolstacks on the same host? If somebody intends to use libvirt, surely she would want to
use it for everything?

This is the interesting question... which probably leads into a more
important question... What is the best practices for config management
and defining configuration for DomU's?

While I recommend that people use a plain text config file in
/etc/xen (although really the files can be just about anywhere) and
then links to various auto-start DomU's in /etc/xen/auto as a general

Am I correct in thinking that libvirt only keeps details of domains
in the xenstore? Is this recommended? Although more a libvirt question
- can libvirt be configured to use config files in /etc/xen or

I think this is largely distribution dependant. In the case of EL/Fedora, libvirt seems to be the distro's intended way of managing VMs, at least for
their primary supported virtualization method (KVM).

In the interest of clarity and maintainability I have seen the light
and converted my VMs to simple text files in /etc/xen/ (there seems to be
no documentation on how to edit most of the settings in xenstore). Some
consensus on the best way would be good, though.


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