xenapi: migration error - original exception not logged

[Mate Lakat]

If there is a non-properly installed host (maybe the /images directory is not created, or ssh was not setup), the following tempest test fails:

nosetests tempest.api.compute.servers.test_server_actions:ServerActionsTestXML.test_resize_server_confirm

This is the log entry from n-cpu:
[req-ee3f693d-2d80-4f7a-927f-19ae6264fd7b ServerActionsTestXML1666436677-user ServerActionsTestXML1666436677-tenant] Exception during message handling
Traceback (most recent call last):
  File "/opt/stack/nova/nova/openstack/common/rpc/amqp.py", line 461, in _process_data
    **args)
  File "/opt/stack/nova/nova/openstack/common/rpc/dispatcher.py", line 172, in dispatch
    result = getattr(proxyobj, method)(ctxt, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 353, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/exception.py", line 90, in wrapped
    payload)
  File "/opt/stack/nova/nova/exception.py", line 73, in wrapped
    return f(self, context, *args, **kw)
  File "/opt/stack/nova/nova/compute/manager.py", line 243, in decorated_function
    pass
  File "/opt/stack/nova/nova/compute/manager.py", line 229, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 294, in decorated_function
    function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 271, in decorated_function
    e, sys.exc_info())
  File "/opt/stack/nova/nova/compute/manager.py", line 258, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 3021, in resize_instance
    block_device_info)
  File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 284, in migrate_disk_and_power_off
    dest, instance_type, block_device_info)
  File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 939, in migrate_disk_and_power_off
    context, instance, dest, vm_ref, sr_path)
  File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 882, in _migrate_disk_resizing_up
    self._migrate_vhd(instance, vdi_uuid, dest, sr_path, seq_num)
  File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 770, in _migrate_vhd
    raise exception.MigrationError(reason=msg)
MigrationError: Migration error: Failed to transfer vhd to new host

It would be good to see what was the actual error message.

[Mate Lakat (mate-lakat)]

This is what I see in compute log:

/usr/bin/rsync -av --progress -e ssh -o StrictHostKeyChecking=no /var/run/sr-mount/48c0ce72-d125-403a-40ae-dbfda62ca9fa/tmp44w5G5/ root@169.254.0.1:/images/instance0194ea30-1bb8-4376-861e-782782f9bba5/

[John Garbutt (johngarbutt)]

might be good to say about what log level you are using?

[John Garbutt (johngarbutt)]

From a code inspection it seems like this got fixed:
https://github.com/openstack/nova/commit/531adcd3d9d098bd784f56ce5e9e0d423e7f8a3d