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 -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). 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 To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/2022955/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp