AttributeError: 'module' object has no attribute 'dump_as_bytes'

[James Slagle]

Seeing the following traceback from nova-compute when trying to launch instances in tripleo-ci for stable/liberty (using the ironic driver):

2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] Traceback (most recent call last):
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2155, in _build_resources
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] yield resources
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2009, in _build_and_run_instance
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] block_device_info=block_device_info)
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/virt/ironic/driver.py", line 802, in spawn
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] files=injected_files)
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/virt/ironic/driver.py", line 716, in _generate_configdrive
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] "error: %s"), e, instance=instance)
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 195, in __exit__
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] six.reraise(self.type_, self.value, self.tb)
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/virt/ironic/driver.py", line 711, in _generate_configdrive
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] with configdrive.ConfigDriveBuilder(instance_md=i_meta) as cdb:
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/virt/configdrive.py", line 72, in __init__
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] self.add_instance_metadata(instance_md)
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/virt/configdrive.py", line 93, in add_instance_metadata
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] for (path, data) in instance_md.metadata_for_config_drive():
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] File "/usr/lib/python2.7/site-packages/nova/api/metadata/base.py", line 465, in metadata_for_config_drive
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] yield (filepath, jsonutils.dump_as_bytes(data['meta-data']))
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] AttributeError: 'module' object has no attribute 'dump_as_bytes'
2016-01-07 13:32:27.691 19349 ERROR nova.compute.manager [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79]
2016-01-07 13:32:27.693 19349 INFO nova.compute.manager [req-6b73f4c5-c031-496e-b2f0-a5380d3ca7ba 285d1c33eca8410e9ed03bbe3de03d15 9448d5b54ff84bd6a8a04b1083eb920f - - -] [instance: 5a7c299b-f6b6-48d8-a20e-36e72c7bed79] Termi

I believe it's caused by this commit:
https://review.openstack.org/#/c/246792/

which I've submitted a revert for:
https://review.openstack.org/#/c/264793/

The failed tripleo-ci job:
http://logs.openstack.org/46/254946/4/check-tripleo/gate-tripleo-ci-f22-nonha/1363b32/

from this patch:
https://review.openstack.org/#/c/254946/

The version of oslo.serialization in use on the job is python2-oslo-serialization-1.9.1-dev3.el7.centos.noarch, tripleo-ci uses delorean which is building rpm's based on the latest from stable/liberty

[Matt Riedemann (mriedem)]

Revert is approved for nova: https://review.openstack.org/#/c/264793/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/264793
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=cf75bf233fb444d363a004845789e9deb965d27d
Submitter: Jenkins
Branch: stable/liberty

commit cf75bf233fb444d363a004845789e9deb965d27d
Author: James Slagle <email address hidden>
Date: Thu Jan 7 09:27:26 2016 -0500

    Revert "Fixes Python 3 str issue in ConfigDrive creation"

    This reverts commit 0134d88b750c304fa893ed4778806e56ec410857.

    The commit was breaking tripleo-ci on stable/liberty with this error:
    AttributeError: 'module' object has no attribute 'dump_as_bytes'

    The root cause is that jsonutils.py from the stable/liberty version of
    oslo.serialization does not have a dump_as_bytes method.

    Partial-Bug: #1531881
    Change-Id: I6a0c90fc319dc3d7fc4ed3347495758cbd7d0cc2

[Ben Nemec (bnemec)]

Looks like the revert landed, so I'm marking this fixed for tripleo.