Re: RFC: "local" communications

[Anthony Liguori <aliguori@us.ibm.com>]

Rik van Riel wrote:

>Hi,
>
>When combining clustering with cluster storage, the situation
>arises where virtual machines are not only managed by the cluster
>software, but also need to participate in the cluster software
>themselves...
>
>In order for this to work better, it would be good if there
>was a way for software in a domU to communicate with software
>on the local dom0 - so after being migrated elsewhere, a guest
>would start talking to the new dom0 automatically.
>
>Now what I'm not sure about is, what would be the best way to
>do this?
>
>Should it be some virtual device analogous to the virtual
>network driver, or should we have some other kind of socket
>for node local communications ?
>
>What kind of approach would the Xen community (that's you, if
>you read this far) prefer ?
>  
>
I can only speak for myself, but I'd personally like to see a small 
userspace library that established a datagram connection between two 
domains (using an event channel and a shared page) that could be reused 
for many applications.

If it could be used with normal read/write calls that would be even 
better (although first thought is that that would require a daemon).

Regards,

Anthony Liguori