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[Bug 1673467] Re: [ocata] unsupported configuration: CPU mode 'host-model' for aarch64 kvm domain on aarch64 host is not supported by hypervisor

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: ChristianEhrhardt <1673467@xxxxxxxxxxxxxxxxxx>
Date: Wed, 05 Jul 2017 07:43:52 -0000
Reply-to: Bug 1673467 <1673467@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Hi trying to get the status right here.
AFAIK these things are changed in libvirt 3.2 to be good - at least for x86, not sure if/how arm followed but since there were major changes we should consider it fixed and re-analyze from there for the development release.
So the coming merge of a newer libvirt will fix it for current Ubuntu-dev.

Since it is a "known behavior" on zesty's version I added a task on
won't fix as so far - as I understood - we thought to better fix it in
Openstack creating the xml's.

Furthermore adding a qemu task which will need to be >=2.9 to let the
code in libvirt >=3.2 really work correctly.

Read [1] for the version references.

[1]: https://libvirt.org/formatdomain.html#elementsCPU


** Also affects: libvirt (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Changed in: libvirt (Ubuntu Zesty)
       Status: New => Triaged

** Changed in: libvirt (Ubuntu Zesty)
       Status: Triaged => Won't Fix

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: qemu (Ubuntu Zesty)

** Changed in: qemu (Ubuntu)
       Status: New => Triaged

** Changed in: libvirt (Ubuntu)
       Status: Incomplete => Triaged

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https://bugs.launchpad.net/bugs/1673467

Title:
  [ocata] unsupported configuration: CPU mode 'host-model' for aarch64
  kvm domain on aarch64 host is not supported by hypervisor

Status in OpenStack nova-compute charm:
  Confirmed
Status in OpenStack Compute (nova):
  New
Status in libvirt package in Ubuntu:
  Triaged
Status in qemu package in Ubuntu:
  Triaged
Status in libvirt source package in Zesty:
  Won't Fix

Bug description:
  We hit this error in Ocata while trying to launch an arm64 instance:

  2017-03-16 08:01:42.329 144245 ERROR nova.virt.libvirt.guest [req-2ad2d5d9-696d-4baa-a071-756e460ca3de 8f431f83f7e44ef1a084e7e27b40a685 a904dd389c5d4817a4d95b8f3268cf4d - - -] Error launching a defined domain with XML: <domain type='kvm'>
    <name>instance-00000001</name>
    <uuid>220bec1b-8907-4da9-9862-9cc2354abf39</uuid>
    <metadata>
      <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0";>
        <nova:package version="15.0.0"/>
        <nova:name>guestOS-test-arm64-kvm-xenial-ci_oil_slave14_0</nova:name>
        <nova:creationTime>2017-03-16 08:01:38</nova:creationTime>
        <nova:flavor name="m1.small">
          <nova:memory>2048</nova:memory>
          <nova:disk>20</nova:disk>
          <nova:swap>0</nova:swap>
          <nova:ephemeral>0</nova:ephemeral>
          <nova:vcpus>1</nova:vcpus>
        </nova:flavor>
        <nova:owner>
          <nova:user uuid="8f431f83f7e44ef1a084e7e27b40a685">admin</nova:user>
          <nova:project uuid="a904dd389c5d4817a4d95b8f3268cf4d">admin</nova:project>
        </nova:owner>
        <nova:root type="image" uuid="4e864421-efc0-4c39-8b49-d619356f72de"/>
      </nova:instance>
    </metadata>
    <memory unit='KiB'>2097152</memory>
    <currentMemory unit='KiB'>2097152</currentMemory>
    <vcpu placement='static'>1</vcpu>
    <cputune>
      <shares>1024</shares>
    </cputune>
    <os>
      <type arch='aarch64' machine='virt-2.8'>hvm</type>
      <loader readonly='yes' type='pflash'>/usr/share/AAVMF/AAVMF_CODE.fd</loader>
      <nvram>/var/lib/libvirt/qemu/nvram/instance-00000001_VARS.fd</nvram>
      <boot dev='hd'/>
    </os>
    <features>
      <acpi/>
      <apic/>
      <gic version='3'/>
    </features>
    <cpu mode='host-model'>
      <model fallback='allow'/>
      <topology sockets='1' cores='1' threads='1'/>
    </cpu>
    <clock offset='utc'>
      <timer name='pit' tickpolicy='delay'/>
      <timer name='rtc' tickpolicy='catchup'/>
    </clock>
    <on_poweroff>destroy</on_poweroff>
    <on_reboot>restart</on_reboot>
    <on_crash>destroy</on_crash>
    <devices>
      <emulator>/usr/bin/kvm</emulator>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2' cache='none'/>
        <source file='/var/lib/nova/instances/220bec1b-8907-4da9-9862-9cc2354abf39/disk'/>
        <target dev='vda' bus='virtio'/>
        <address type='virtio-mmio'/>
      </disk>
      <controller type='pci' index='0' model='pcie-root'/>
      <interface type='bridge'>
        <mac address='fa:16:3e:74:b0:97'/>
        <source bridge='qbr9a95f1e8-d5'/>
        <target dev='tap9a95f1e8-d5'/>
        <model type='virtio'/>
        <address type='virtio-mmio'/>
      </interface>
      <serial type='pty'>
        <log file='/var/lib/nova/instances/220bec1b-8907-4da9-9862-9cc2354abf39/console.log' append='off'/>
        <target port='0'/>
      </serial>
      <console type='pty'>
        <log file='/var/lib/nova/instances/220bec1b-8907-4da9-9862-9cc2354abf39/console.log' append='off'/>
        <target type='serial' port='0'/>
      </console>
      <memballoon model='virtio'>
        <stats period='10'/>
        <address type='virtio-mmio'/>
      </memballoon>
    </devices>
  </domain>
               
  2017-03-16 08:01:42.333 144245 ERROR nova.virt.libvirt.driver [req-2ad2d5d9-696d-4baa-a071-756e460ca3de 8f431f83f7e44ef1a084e7e27b40a685 a904dd389c5d4817a4d95b8f3268cf4d - - -] [instance: 220bec1b-8907-4da9-9862-9cc2354abf39] Failed to start libvirt guest
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1930, in _build_and_run_instance
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     block_device_info=block_device_info)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2688, in spawn
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     destroy_disks_on_failure=True)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 5099, in _create_domain_and_network
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     destroy_disks_on_failure)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     self.force_reraise()
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     six.reraise(self.type_, self.value, self.tb)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 5071, in _create_domain_and_network
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     post_xml_callback=post_xml_callback)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 4989, in _create_domain
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     guest.launch(pause=pause)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     self._encoded_xml, errors='ignore')
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     self.force_reraise()
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     six.reraise(self.type_, self.value, self.tb)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/guest.py", line 140, in launch
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     return self._domain.createWithFlags(flags)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 186, in doit
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     result = proxy_call(self._autowrap, f, *args, **kwargs)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 144, in proxy_call
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     rv = execute(f, *args, **kwargs)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 125, in execute
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     six.reraise(c, e, tb)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 83, in tworker
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     rv = meth(*args, **kwargs)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1065, in createWithFlags
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]     if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self)
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39] libvirtError: unsupported configuration: CPU mode 'host-model' for aarch64 kvm domain on aarch64 host is not supported by hypervisor
  2017-03-16 08:01:43.522 144245 ERROR nova.compute.manager [instance: 220bec1b-8907-4da9-9862-9cc2354abf39]

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References

[Bug 1673467] [NEW] [ocata] unsupported configuration: CPU mode 'host-model' for aarch64 kvm domain on aarch64 host is not supported by hypervisor
From: Larry Michel, 2017-03-16