Re: xl list -l doesn't work for incoming domain

[Ian Campbell <Ian.Campbell@citrix.com>]

On Mon, 2014-11-10 at 12:35 +0000, Wei Liu wrote:
> On Fri, Nov 07, 2014 at 11:34:33AM -0500, Zhigang Wang wrote:
> > On 11/07/2014 05:47 AM, Wei Liu wrote:
> > > On Thu, Nov 06, 2014 at 02:14:42PM -0500, Zhigang Wang wrote:
> > >> Hi,
> > >>
> > >> While doing VM migration, in the destination side:
> > >>
> > >>    # xl list -l
> > >>     libxl: error: libxl.c:6535:libxl_retrieve_domain_configuration: fail to get domain configuration for domain 7
> > >>     [
> > >>         {
> > >>             "domid": 0,
> > >>             "config": {
> > >>                 "c_info": {
> > >>                     "type": "pv",
> > >>                     "name": "Domain-0"
> > >>                 },
> > >>                 "b_info": {
> > >>                     "max_memkb": 876544,
> > >>                     "target_memkb": 876543,
> > >>                     "sched_params": {
> > >>     
> > >>                     },
> > >>                     "type.pv": {
> > >>     
> > >>                     }
> > >>                 }
> > >>             }
> > >>         }
> > >>     ]
> > >>  
> > >>     # xl list
> > >>     Name                                          ID   Mem VCPUs      State   Time(s)
> > >>     Domain-0                                       0   856     4     r-----    2758.9
> > >>     0004fb00000600003f327a843a5f2b72--incoming     7   131     1     --p---       0.0
> > >>
> > >> Testing on:
> > >>
> > > 
> > > What's the rune you used to migrate the domain? xl migrate? Why is the
> > > domain paused?
> > 
> > The domain is under migrating, so the destination side it's paused. When migration finish,
> > it will become running.
> > 
> > FYI: the domain migration will success.
> > 
> 
> I see. At that point the configuration was not available, yet. After the
> domain is successfully migrated, the configuration should be available.
> 
> I think a domain under construction without domain configuration is a
> valid state. What do you think?

Can we write a stub json file at the beginning of migrate receive, a bit
like we do on create?

Otherwise code like xl list is going to have start special casing
domains which have no json, which we've tried hard to avoid I think.

Ian.