[Xen-devel] Problem when launch instance in OpenStack when we use xen as virtuallization layer

[Kai Luo <luokain@xxxxxxxxx>]

Hello all:

      Recently we are trying to deploy OpenStack with xen 4.3.0 as virtualization layer, however an error occered when we launch an instance from an image.We have confirmed that OpenStack services work fine and the problem may lies in the xen layer.We checked the xend log and got the following exception:

TapdiskException: ('create', '-aqcow2:arbva/instances4b07c5-7443-418b-81c4-a1f55fb264d3/disk') failed (32512  )

[2014-02-18 21:13:43 11395] DEBUG (XendDomainInfo:3078) XendDomainInfo.destroy: domid=21

[2014-02-18 21:13:43 11395] DEBUG (XendDomainInfo:2408) No device model

[2014-02-18 21:13:43 11395] DEBUG (XendDomainInfo:2410) Releasing devices

[2014-02-18 21:13:43 11395] ERROR (SrvBase:88) Request start failed.

Traceback (most recent call last):

  File "/usrb/xen-4.3/bin/..b/python/xen/web/SrvBase.py", line 85, in perform

    return op_method(op, req)

  File "/usrb/xen-4.3/bin/..b/python/xen/xendrver/SrvDomain.py", line 77, in op_start

    return self.xd.domain_start(self.dom.getName(), paused)

  File "/usrb/xen-4.3/bin/..b/python/xen/xend/XendDomain.py", line 1070, in domain_start

    dominfo.start(is_managed = True)

  File "/usrb/xen-4.3/bin/..b/python/xen/xend/XendDomainInfo.py", line 474, in start

    XendTask.log_progress(31, 60, self._initDomain)

  File "/usrb/xen-4.3/bin/..b/python/xen/xend/XendTask.py", line 209, in log_progress

    retval = func(*args, **kwds)

  File "/usrb/xen-4.3/bin/..b/python/xen/xend/XendDomainInfo.py", line 2845, in _initDomain

    self._configureBootloader()

  File "/usrb/xen-4.3/bin/..b/python/xen/xend/XendDomainInfo.py", line 3286, in _configureBootloader

    mounted_vbd_uuid = dom0.create_vbd(vbd, disk);

  File "/usrb/xen-4.3/bin/..b/python/xen/xend/XendDomainInfo.py", line 3979, in create_vbd

    devid = dev_control.createDevice(config)

  File "/usrb/xen-4.3/bin/..b/python/xen/xendrver/BlktapController.py", line 172, in createDevice

    device = TapdiskController.create(params, file)

  File "/usrb/xen-4.3/bin/..b/python/xen/xendrver/BlktapController.py", line 284, in create

    return TapdiskController.exc('create', '-a%s:%s' % (dtype, image))

  File "/usrb/xen-4.3/bin/..b/python/xen/xendrver/BlktapController.py", line 231, in exc

    (args, rc, out, err))

TapdiskException: ('create', '-aqcow2:arbva/instances4b07c5-7443-418b-81c4-a1f55fb264d3/disk') failed (32512  )

[2014-02-18 21:13:44 11395] INFO (XendDomain:1126) Domain instance-00000035 (db4b07c5-7443-418b-81c4-a1f55fb264d3) deleted.

     We tryed to use image of RAW or QCOW2 format and switch the xen toolstack from xm to xl,still did't work.when we switch the toolstack to xl and closed the xend service, the virt-manager did not work either.We don't know what caused this problem and we know XCP may be a better choice but we have to use xen as OpenStack virtualization layer because some modifications have made in xen.Could you give any suggestions?

Jone

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