** Changed in: nova
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1373962
Title:
LVM backed VM fails to launch
Status in OpenStack Compute (Nova):
Fix Released
Bug description:
LVM ephemeral storage backend is broken in the most recent Nova
(commit 945646e1298a53be6ae284766f5023d754dfe57d)
To reproduce in Devstack:
1. Configure Nova to use LVM ephemeral storage by adding to
create_nova_conf function in lib/nova
iniset $NOVA_CONF libvirt images_type "lvm"
iniset $NOVA_CONF libvirt images_volume_group "nova-lvm"
2. Create a backing file for LVM
truncate -s 5G nova-backing-file
3. Mount the file via loop device
sudo losetup /dev/loop0 nova-backing-file
4. Create nova-lvm volume group
sudo vgcreate nova-lvm /dev/loop0
5. Launch Devstack
6. Alternatively, skipping step 1, /etc/nova/nova.conf can be modified
after Devstack is launched by adding
[libvirt]
images_type = lvm
images_volume_group = nova-lvm
and then restarting nova-compute by entering the Devstack screen
session, going to the n-cpu screen and hitting Ctrl-C, Up-arrow, and
Enter.
7. Launch an instance
nova boot test --flavor 1 --image cirros-0.3.2-x86_64-uec
Instance fails to launch. Nova compute reports
2014-09-25 10:11:08.180 ERROR nova.compute.manager
[req-b7924ad0-5f4b-46eb-a798-571d97c77145 demo demo] [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] Instance failed to spawn
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] Traceback (most recent call last):
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/compute/manager.py", line 2231, in _build_resources
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] yield resources
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/compute/manager.py", line 2101, in _build_and_run_instance
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] block_device_info=block_device_info)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 2617, in spawn
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] block_device_info,
disk_info=disk_info)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 4434, in
_create_domain_and_network
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] domain.destroy()
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 4358, in _create_domain
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] for vif in network_info if
vif.get('active', True) is False]
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] six.reraise(self.type_, self.value,
self.tb)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 4349, in _create_domain
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] raise
exception.VirtualInterfaceCreateException()
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] result = proxy_call(self._autowrap,
f, *args, **kwargs)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in
proxy_call
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] rv = execute(f, *args, **kwargs)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] six.reraise(c, e, tb)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] rv = meth(*args, **kwargs)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] File
"/usr/lib/python2.7/dist-packages/libvirt.py", line 711, in createWithFlags
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] if ret == -1: raise libvirtError
('virDomainCreateWithFlags() failed', dom=self)
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] libvirtError: cannot open file
'/dev/nova-lvm/8d69f0de-253a-403e-a137-0da77b0d415c_disk.config': No such file
or directory
2014-09-25 10:11:08.180 29649 TRACE nova.compute.manager [instance:
8d69f0de-253a-403e-a137-0da77b0d415c]
2014-09-25 10:11:08.218 AUDIT nova.compute.manager
[req-b7924ad0-5f4b-46eb-a798-571d97c77145 demo demo] [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] Terminating instance
2014-09-25 10:11:08.228 29649 INFO nova.virt.libvirt.driver [-] [instance:
8d69f0de-253a-403e-a137-0da77b0d415c] Instance destroyed successfully.
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