Re: [Xen-users] Running scripts on domU create/shutdown?

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

Hi, Steve,

>   I'm working on the early design stages of a multi-dom0 xen
>  monitoring tool, (to replace my previous attempt "Argo").

Ah cool.  Argo looked quite funky to me, so it'll be interesting to see what 
you come up with.  Do you have a particular use case in mind that you're 
making this for?

>   One thing that would be very useful for a monitoring tool
>  would be the ability to run a script, or scripts, upon
>  dom0 events:
>
>     domU creation
>     domU shutdown

I've now replied to your e-mail commenting on technical issues on the 
xen-devel list.

Cheers,
Mark

>   Ideally /etc/xen/events/domU-up.d/* + domU-down.d/* or
>  similar.  (Running every executable the appropriate directory
>  with a single argument of the domain name would be sufficient
>  for my purposes.)
>
>   I've managed to write simple behavior for this by hacking
>  /etc/xen/scripts/vif-common.sh.  I can detect startup/shutdown
>  by looking at the first command line argument.
>
>   From there I can examine $XENBUS_PATH to get the ID of the
>  domain which is being created/destroyed - however there
>  isn't a simple mechanism that I've seen to get the domain
>  name.
>
>   So two questions:
>
>     1.  Is there a simple method to get the domain name
>        from the ID, short of parsing "xm list N"?
>
>     2.  Would this kind of startup/shutdown hook be useful
>        to others, and if so would a patch be applied?  (I'm
>        happy to submit my code.)
>
> Steve

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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