On Sat, May 22, 2010 at 06:47:19PM -0700, Scott Feldman wrote: > On 5/22/10 6:24 PM, "Dave Allan" <dallan@xxxxxxxxxx> wrote: > > >>> Mostly I'm concerned about the failure case: how would the user know > >>> that something has gone wrong, and where would information to debug > >>> the problem appear? > >> > >> Think of it as equivalent to waiting to get link UP after plugging in a > >> physical cable into a physical switch port. In some cases negotiation of > >> the link may take on the order of seconds. Depends on the physical media, > >> of course. A user can check for link UP using ethtool or ip cmd. > >> Similarly, a user can check for association status using ip cmd, once we > >> extend ip cmd to know about virtual ports (patch for ip cmd coming soon). > > > > That's the way I was thinking about it as well. The difference I see > > between an actual physical cable and what we're doing here is that if > > you're in the data center and you plug in a cable, you're focused on > > whether the link comes up. Here, the actor is likely to be an > > automated process, and users will simply be presented with a VM with > > no or incorrect connectivity, and they will have no idea what > > happened. It's just not supportable to provide them with no > > indication of what failed or why. > > What can we do in libvirt to provide async status of port-profile > association? How could an aynsc status be reported to the user via libvirt? > In the virt-manager GUI, for example, on the details sheet for the NICs, can > we display the status of the backing virtual port? Kind of like the status > on the basic details overview sheet. Actually, if we could display the > other virtual port settings like port-profile name of VSI-* tuple along with > status, then the user would have some good info to start troubleshooting. It's not impossible to do what you're suggesting here, but what's the benefit? Is it a problem to poll for even 10 or 20 seconds? Dave -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list