Public bug reported:
When we created the CPU power interface, we forgot to add a specific privsep
decorator for the set_offline() method :
https://review.opendev.org/c/openstack/nova/+/868236/5/nova/virt/libvirt/cpu/core.py#63
As a result, we have a FileNotFound due to a permission error when
restarting the nova-compute service :
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Traceback (most recent call last):
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/filesystem.py", line 56, in write_sys
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
with open(os.path.join(SYS, path), mode='w') as fd:
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
PermissionError: [Errno 13] Permission denied:
'/sys/devices/system/cpu/cpu1/online'
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service The
above exception was the direct cause of the following exception:
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Traceback (most recent call last):
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/usr/local/lib/python3.10/dist-packages/oslo_service/service.py", line
806, in run_service
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
service.start()
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/service.py", line 162, in start
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
self.manager.init_host(self.service_ref)
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/compute/manager.py", line 1608, in init_host
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
self.driver.init_host(host=self.host)
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 831, in init_host
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
libvirt_cpu.power_down_all_dedicated_cpus()
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/cpu/api.py", line 128, in
power_down_all_dedicated_cpus
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
pcpu.online = False
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/cpu/api.py", line 50, in online
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
core.set_offline(self.ident)
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/cpu/core.py", line 64, in set_offline
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
filesystem.write_sys(os.path.join(gen_cpu_path(core), 'online'), data='0')
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/filesystem.py", line 59, in write_sys
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
raise exception.FileNotFound(file_path=path) from exc
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
nova.exception.FileNotFound: File /sys/devices/system/cpu/cpu1/online could not
be found.
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
** Affects: nova
Importance: Undecided
Assignee: Sylvain Bauza (sylvain-bauza)
Status: In Progress
** Tags: cpu libvirt
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https://bugs.launchpad.net/bugs/2022955
Title:
FileNotFound when offlining a core due to a privsep context missing
Status in OpenStack Compute (nova):
In Progress
Bug description:
When we created the CPU power interface, we forgot to add a specific privsep
decorator for the set_offline() method :
https://review.opendev.org/c/openstack/nova/+/868236/5/nova/virt/libvirt/cpu/core.py#63
As a result, we have a FileNotFound due to a permission error when
restarting the nova-compute service :
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Traceback (most recent call last):
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/filesystem.py", line 56, in write_sys
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
with open(os.path.join(SYS, path), mode='w') as fd:
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
PermissionError: [Errno 13] Permission denied:
'/sys/devices/system/cpu/cpu1/online'
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
The above exception was the direct cause of the following exception:
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
Traceback (most recent call last):
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/usr/local/lib/python3.10/dist-packages/oslo_service/service.py", line
806, in run_service
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
service.start()
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/service.py", line 162, in start
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
self.manager.init_host(self.service_ref)
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/compute/manager.py", line 1608, in init_host
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
self.driver.init_host(host=self.host)
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 831, in init_host
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
libvirt_cpu.power_down_all_dedicated_cpus()
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/cpu/api.py", line 128, in
power_down_all_dedicated_cpus
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
pcpu.online = False
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/cpu/api.py", line 50, in online
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
core.set_offline(self.ident)
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/virt/libvirt/cpu/core.py", line 64, in set_offline
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
filesystem.write_sys(os.path.join(gen_cpu_path(core), 'online'), data='0')
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
File "/opt/stack/nova/nova/filesystem.py", line 59, in write_sys
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
raise exception.FileNotFound(file_path=path) from exc
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
nova.exception.FileNotFound: File /sys/devices/system/cpu/cpu1/online could not
be found.
Jun 05 16:18:49 sbauza-dev2 nova-compute[76374]: ERROR oslo_service.service
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