Public bug reported: [This bug was originally reported by Lukas Bezdicka when testing Red Hat's OpenStack (OSP); but this should be reproducible in upstream context as well. I'm writing this report based on the root cause analysis in the environment where the bug occcurred. Thanks to Daniel Berrangé for the debugging help!]
Description ----------- Live-migrating a guest from 'Queens' compute node (running CentOS 7) to a 'Train' compute node (running CentOS 8) fails with: ----------------------------------------------------------------------- [...] _compare_cpu /usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py:8559 2021-01-26 23:30:25.169 7 ERROR nova.virt.libvirt.driver [req-774be110-7fb6-4865-a177-d624a821cf9e 19ec0130b8714aac8c64a5c2ee5b914b 352675f5f34d45d59bdd61fde58e4bd0 - default default] CPU doesn't have compatibility. 0 Refer to http://libvirt.org/html/libvirt-libvirt-host.html#virCPUCompareResult 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server [req-774be110-7fb6-4865-a177-d624a821cf9e 19ec0130b8714aac8c64a5c2ee5b914b 352675f5f34d45d59bdd61fde58e4bd0 - default default] Exception during message handling: nova.exception.InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility. [...] 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server block_migration, disk_over_commit) 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 8258, in check_can_live_migrate_destination 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server self._compare_cpu(None, source_cpu_info, instance) 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 8575, in _compare_cpu 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server raise exception.InvalidCPUInfo(reason=m % {'ret': ret, 'u': u}) 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server nova.exception.InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility. 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server [...] ----------------------------------------------------------------------- Environment ----------- The bug was reported by testing in a nested KVM environment, running on Intel hardware (Xeon(R) Gold 5218R CPU @ 2.10GHz), with the entire OpenStack setup in VMs. So the Nova instances themselves will be nested guests. - Source: a CentOS-7 compute node (a level-1 guest), running OpenStack 'Queens' - Destination: a CentOS-8 compute node (a level-1 guest), running OpenStack 'Train' Steps to reproduce ------------------ Live-migrate a guest from source to host. Expected result --------------- Live migration should've succeeded. Actual result ------------- Live migration fails during compareCPU() check on the destination host with: [...] _compare_cpu /usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py:8559 2021-01-26 23:30:25.169 7 ERROR nova.virt.libvirt.driver [req-774be110-7fb6-4865-a177-d624a821cf9e 19ec0130b8714aac8c64a5c2ee5b914b 352675f5f34d45d59bdd61fde58e4bd0 - default default] CPU doesn't have compatibility. [...] ** Affects: nova Importance: Undecided Status: New -- 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/1913716 Title: Live-migrating a guest from 'Queens' to 'Train' fails during libvirt's compareCPU() check Status in OpenStack Compute (nova): New Bug description: [This bug was originally reported by Lukas Bezdicka when testing Red Hat's OpenStack (OSP); but this should be reproducible in upstream context as well. I'm writing this report based on the root cause analysis in the environment where the bug occcurred. Thanks to Daniel Berrangé for the debugging help!] Description ----------- Live-migrating a guest from 'Queens' compute node (running CentOS 7) to a 'Train' compute node (running CentOS 8) fails with: ----------------------------------------------------------------------- [...] _compare_cpu /usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py:8559 2021-01-26 23:30:25.169 7 ERROR nova.virt.libvirt.driver [req-774be110-7fb6-4865-a177-d624a821cf9e 19ec0130b8714aac8c64a5c2ee5b914b 352675f5f34d45d59bdd61fde58e4bd0 - default default] CPU doesn't have compatibility. 0 Refer to http://libvirt.org/html/libvirt-libvirt-host.html#virCPUCompareResult 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server [req-774be110-7fb6-4865-a177-d624a821cf9e 19ec0130b8714aac8c64a5c2ee5b914b 352675f5f34d45d59bdd61fde58e4bd0 - default default] Exception during message handling: nova.exception.InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility. [...] 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server block_migration, disk_over_commit) 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 8258, in check_can_live_migrate_destination 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server self._compare_cpu(None, source_cpu_info, instance) 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py", line 8575, in _compare_cpu 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server raise exception.InvalidCPUInfo(reason=m % {'ret': ret, 'u': u}) 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server nova.exception.InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility. 2021-01-26 23:30:25.242 7 ERROR oslo_messaging.rpc.server [...] ----------------------------------------------------------------------- Environment ----------- The bug was reported by testing in a nested KVM environment, running on Intel hardware (Xeon(R) Gold 5218R CPU @ 2.10GHz), with the entire OpenStack setup in VMs. So the Nova instances themselves will be nested guests. - Source: a CentOS-7 compute node (a level-1 guest), running OpenStack 'Queens' - Destination: a CentOS-8 compute node (a level-1 guest), running OpenStack 'Train' Steps to reproduce ------------------ Live-migrate a guest from source to host. Expected result --------------- Live migration should've succeeded. Actual result ------------- Live migration fails during compareCPU() check on the destination host with: [...] _compare_cpu /usr/lib/python3.6/site-packages/nova/virt/libvirt/driver.py:8559 2021-01-26 23:30:25.169 7 ERROR nova.virt.libvirt.driver [req-774be110-7fb6-4865-a177-d624a821cf9e 19ec0130b8714aac8c64a5c2ee5b914b 352675f5f34d45d59bdd61fde58e4bd0 - default default] CPU doesn't have compatibility. [...] To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1913716/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
