I can reproduce this using Ubuntu LTS 12.04 and 0.9.8-2ubuntu17 as
mentioned. I use OpenStack nova (2012.1-0ubuntu2) and (openstack-
dashboard 2012.1-0ubuntu8). However the same problem occurs when the
nova command line client is used.
The nova.conf part relevant for nova-volume looks like this:
volume_group=nova-volumes
volume_name_template=volume-%08x
iscsi_helper=tgtadm
The iSCSI device on the nova-volume side is created successfully and is
usable from the physical host. I can attach and use the device using
"virsh" but now using OpenStack.
Replacing the line
virt_dom.attachDevice(xml)
in /usr/share/pyshared/nova/virt/libvirt/connection.py with
LOG.info("Attaching device with virsh because attachDevice does
not work")
device_path = connection_info['data']['device_path']
utils.execute('virsh', "attach-disk", instance_name,
device_path, mount_device, run_as_root=True)
and adding
filters.CommandFilter("/usr/bin/virsh", "root"),
to /usr/share/pyshared/nova/rootwrap/compute.py
works.
This behaviour is rather strange as I am sure it worked before.
This I tried:
- restarting all nova services (on compute host and controller which is also
the nova volume host)
- restarting libvirt-bin
- restarting tgtd on nova-volume host
I also tried to manually attach the volume using the libvirt-python
bindings like this:
conn=libvirt.open("qemu:///system")
dom = conn.lookupByName("instance-00000047")
xml="""<disk type='block'>
<driver name='qemu' type='raw' cache='none'/>
<source
dev='/dev/disk/by-path/ip-192.168.124.81:3260-iscsi-iqn.2010-10.org.openstack:volume-00000009-lun-1'/>
<target dev='vdc' bus='virtio'/>
</disk>"""
dom.attachDevice(xml)
The result was the same as with OpenStack: The API call hangs and the
libvirt log does not show any other info as already posted above.
Attaching the volume via CLI using "virsh" does work.
Detaching the volume also works with Python using dom.detachDevice(xml).
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https://bugs.launchpad.net/bugs/996840
Title:
Libvirt error when trying to mount ISCSI volumes
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