libvirt users - Mar 2016 - control virtualbox from virsh

Hi.

I am running virtualbox 4.3 on Mac OS X 10.11.12 and libvirtd 1.3.1 (installed
with brew).
I want to control the virtual machines via virsh.

On libvirtd, I enabled tcp mode, removed all the authentication etc.. It's a
development environment, so no worries here.
It allows me to make a call such as:
virsh –c vbox+tcp://172.30.5.51/session list —all

172.30.5.51 being my Mac IP address.

Virsh connects successfully to libvirtd (I see my request in the log) but the
"list —all" returns an error.

virsh -c vbox+tcp://172.30.5.51/session list --all
error: Failed to list domains
error: invalid connection pointer in virGetDomain


Based on the debug logs, it appears the vbox driver is properly used

2016-03-03 22:27:44.415+0000: 18446744073709551615: debug : do_open:1003 : name
"vbox:///session" to URI components:
  scheme vbox
  server <null>
  user <null>
  port -1
  path /session
(…)
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : do_open:1050 :
trying driver 4 (VBOX) ...
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : virArchFromHost:181
: Mapped x86_64 to 32 (x86_64)
2016-03-03 22:27:44.416+0000: 18446744073709551615: info : virObjectNew:202 :
OBJECT_NEW: obj=0x7fa41950b2c0 classname=virCaps
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : virArchFromHost:181
: Mapped x86_64 to 32 (x86_64)
2016-03-03 22:27:44.416+0000: 18446744073709551615: info : virObjectNew:202 :
OBJECT_NEW: obj=0x7fa41a208da0 classname=virDomainXMLOption
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : vboxConnectOpen:460
: in vboxOpen
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : do_open:1065 :
driver 4 VBOX returned SUCCESS


But later there is this error:

2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virThreadJobSet:96 :
Thread 18446744073709551615 (virNetServerHandleJob) is now running job
remoteDispatchConnectListAllDomains
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollCleanupTimeouts:526 : Cleanup 2
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
remoteDispatchConnectListAllDomainsHelper:1219 : server=0x7fa419700040
client=0x7fa4196037c0 msg=0x7fa41a201280 rerr=0x700000415d40 args=0x7fa419602c90
ret=0x7fa419600ad0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollCleanupHandles:575 : Cleanup 5
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virConnectListAllDomains:6701 : conn=0x7fa41950afe0, domains=0x700000415c40,
flags=3
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollMakePollFDs:401 : Prepare n=0 w=1, f=5 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollMakePollFDs:401 : Prepare n=1 w=2, f=7 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollMakePollFDs:401 : Prepare n=2 w=3, f=9 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollMakePollFDs:401 : Prepare n=3 w=4, f=11 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollMakePollFDs:401 : Prepare n=4 w=8, f=12 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollCalculateTimeout:338 : Calculate expiry of 2 timers
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollCalculateTimeout:346 : Got a timeout scheduled for 1457044069419
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollCalculateTimeout:359 : Schedule timeout then=1457044069419
now=1457044064420
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug :
virEventPollCalculateTimeout:369 : Timeout at 1457044069419 due in 4999 ms
2016-03-03 22:27:44.420+0000: 18446744073709551615: info :
virEventPollRunOnce:641 : EVENT_POLL_RUN: nhandles=5 timeout=4999
2016-03-03 22:27:44.421+0000: 18446744073709551615: error : virGetDomain:203 :
invalid connection pointer in virGetDomain
2016-03-03 22:27:44.422+0000: 18446744073709551615: debug :
virThreadJobClear:121 : Thread 18446744073709551615 (virNetServerHandleJob)
finished job remoteDispatchConnectListAllDomains with ret=-1


The full log is here http://pastebin.com/raw/83Fgs5MZ


I've been digging around but can't find anything I should change in my
configuration or in virtualbox.
I poked in the libvirt code, but I am not a C developer, so can't really
figure it out.


Any chance somebody sees a solution to this?
There must be something obvious that I don't see…

Thanks!


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