Public bug reported:
The patch - https://review.openstack.org/#/c/571535 was introduced with
the aim of keeping the same uuid value for ironic nodes and their
corresponding compute_node records. This works fine for when new nodes
are created. However upon restart/periodic updates from the ironic
driver, it tries to update the uuid of an existing compute_node record
based on the resource update from the ironic driver and this fails since
once a uuid is set it cannot be changed/updated.
Error traceback:
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
[req-62cf93be-023b-41ca-8971-d3dbab4324f8 - - - - -] Error updating resources
for node e3ef5531-3c39-458a-99f0-fd44592ae1ae.: ReadOnlyFieldError: Cannot
modify readonly field uuid
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager Traceback (most recent
call last):
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 7337, in
update_available_resource_for_node
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
rt.update_available_resource(context, nodename)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 680,
in update_available_resource
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
self._update_available_resource(context, resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/oslo_concurrency/lockutils.py", line 274, in
inner
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager return f(*args,
**kwargs)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 704,
in _update_available_resource
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
self._init_compute_node(context, resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 559,
in _init_compute_node
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
self._copy_resources(cn, resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 617,
in _copy_resources
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
compute_node.update_from_virt_driver(resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/objects/compute_node.py", line 353, in
update_from_virt_driver
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager setattr(self, key,
resources[key])
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 77, in
setter
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager raise
exception.ReadOnlyFieldError(field=name)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager ReadOnlyFieldError:
Cannot modify readonly field uuid
** Affects: nova
Importance: High
Status: Triaged
** Affects: nova/rocky
Importance: High
Status: Confirmed
** Tags: compute ironic upgrade
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https://bugs.launchpad.net/bugs/1798172
Title:
Ironic driver tries to update the compute_node's UUID which of course
fails in case of existing compute_nodes
Status in OpenStack Compute (nova):
Triaged
Status in OpenStack Compute (nova) rocky series:
Confirmed
Bug description:
The patch - https://review.openstack.org/#/c/571535 was introduced
with the aim of keeping the same uuid value for ironic nodes and their
corresponding compute_node records. This works fine for when new nodes
are created. However upon restart/periodic updates from the ironic
driver, it tries to update the uuid of an existing compute_node record
based on the resource update from the ironic driver and this fails
since once a uuid is set it cannot be changed/updated.
Error traceback:
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
[req-62cf93be-023b-41ca-8971-d3dbab4324f8 - - - - -] Error updating resources
for node e3ef5531-3c39-458a-99f0-fd44592ae1ae.: ReadOnlyFieldError: Cannot
modify readonly field uuid
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager Traceback (most
recent call last):
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 7337, in
update_available_resource_for_node
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
rt.update_available_resource(context, nodename)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 680,
in update_available_resource
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
self._update_available_resource(context, resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/oslo_concurrency/lockutils.py", line 274, in
inner
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager return f(*args,
**kwargs)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 704,
in _update_available_resource
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
self._init_compute_node(context, resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 559,
in _init_compute_node
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
self._copy_resources(cn, resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 617,
in _copy_resources
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager
compute_node.update_from_virt_driver(resources)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/nova/objects/compute_node.py", line 353, in
update_from_virt_driver
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager setattr(self,
key, resources[key])
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager File
"/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 77, in
setter
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager raise
exception.ReadOnlyFieldError(field=name)
2018-10-11 02:30:34.142 21850 ERROR nova.compute.manager ReadOnlyFieldError:
Cannot modify readonly field uuid
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