** Changed in: nova
Status: Fix Committed => Fix Released
** Changed in: nova
Milestone: None => havana-3
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https://bugs.launchpad.net/bugs/1196570
Title:
xenapi: pygrub running in domU
Status in OpenStack Compute (Nova):
Fix Released
Bug description:
While I was playing with boot from volume, I discovered that I end up
with a:
PV instance if --image-id specified
HVM instance if --image-id is NOT specified
That should be an issue caused by not having the proper metadata
without --image-id switch. But, as part of the investigation,
interesting log entries appeared in cpu log:
DEBUG nova.virt.xenapi.vm_utils [req-67592d22-4561-4a81-8868-8ac6895efa9d
admin demo] Looking up vdi OpaqueRef:055...
WARNING nova.virt.xenapi.vm_utils [req-67592d22-4561-4a81-8868-8ac6895efa9d
admin demo] Image format is None: trying to determine PV status using pygrub;
if instance with vdi OpaqueRef:05503c3e-f1c2-e789-ac3b-38b616
6c59aa does not boot correctly, try with image metadata.
DEBUG nova.virt.xenapi.vm_utils [req-67592d22-4561-4a81-8868-8ac6895efa9d
admin demo] Running pygrub against xvdc
DEBUG nova.openstack.common.processutils
[req-67592d22-4561-4a81-8868-8ac6895efa9d admin demo] Running cmd (subprocess):
sudo nova-rootwrap /etc/nova/rootwrap.conf pygrub -qn /dev/xvdc
Error while executing pygrub! Please, ensure the binary is installed
correctly, and available in your PATH; on some Linux distros, pygrub may be
installed in /usr/lib/xen-X.Y/bin/pygrub. Attempting to boot in HVM mode.
TRACE nova.virt.xenapi.vm_utils Traceback (most recent call last):
TRACE nova.virt.xenapi.vm_utils File
"/opt/stack/nova/nova/virt/xenapi/vm_utils.py", line 2039, in _is_vdi_pv
TRACE nova.virt.xenapi.vm_utils out, err = utils.execute('pygrub', '-qn',
dev_path, run_as_root=True)
TRACE nova.virt.xenapi.vm_utils File "/opt/stack/nova/nova/utils.py", line
162, in execute
TRACE nova.virt.xenapi.vm_utils return processutils.execute(*cmd,
**kwargs)
TRACE nova.virt.xenapi.vm_utils File
"/opt/stack/nova/nova/openstack/common/processutils.py", line 173, in execute
TRACE nova.virt.xenapi.vm_utils cmd=' '.join(cmd))
TRACE nova.virt.xenapi.vm_utils ProcessExecutionError: Unexpected error while
running command.
TRACE nova.virt.xenapi.vm_utils Command: sudo nova-rootwrap
/etc/nova/rootwrap.conf pygrub -qn /dev/xvdc
TRACE nova.virt.xenapi.vm_utils Exit code: 96
TRACE nova.virt.xenapi.vm_utils Stdout: '/usr/local/bin/nova-rootwrap:
Executable not found: pygrub (filter match = pygrub)\n'
TRACE nova.virt.xenapi.vm_utils Stderr: ''
TRACE nova.virt.xenapi.vm_utils
This error says, you need to have pygrub in domU. I think, we should
really be calling down to dom0, and asking those tools to detect if
the machine is PV bootable or not.
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