Comment 2 for bug 944096

That would require a fairly significant restructuring of the code since the compute manager is pretty ignorant about image services or how the drivers actually work. Implementing retries at the manager level would be pretty awkward right now.

I'm testing a change which moves the retry logic from the glance plugin to the xenapi driver. This will allow it to cycle through glance hosts to find one that is actually working.

I'm not against a more significant restructuring, but as an intermediate step I think the patch I'll propose later today will be a good minimal step.