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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

 

This bug was fixed in the package libvirt - 3.5.0-1ubuntu1

---------------
libvirt (3.5.0-1ubuntu1) artful; urgency=medium

  * Merged with Debian unstable (3.5)
    This closes several bugs:
    - improved handling of host-model since libvirt 3.2 (LP: #1673467)
    - Adding POWER9 cpu model to cpu_map.xml (LP: #1690209)
  * Remaining changes:
    - Disable sheepdog (universe dependency)
    - Disable libssh2 support (universe dependency)
    - Disable firewalld support (universe dependency)
    - Disable selinux
    - Enable esx support
      + Add build-dep to libcurl4-gnutls-dev (required for esx)
    - Set qemu-group to kvm (for compat with older ubuntu)
    - Regularly clear AppArmor profiles for vms that no longer exist
    - Additional apport package-hook
    - Modifications to adapt for our delayed switch away from libvirt-bin (can
      be dropped >18.04).
      + d/p/ubuntu/libvirtd-service-add-bin-alias.patch: systemd: define alias
        to old service name so that old references work
      + d/p/ubuntu/libvirtd-init-add-bin-alias.patch: sysv init: define alias
        to old service name so that old references work
      + d/control: transitional package with the old name and maintainer
        scripts to handle the transition
    - Backwards compatible handling of group rename (can be dropped >18.04).
    - config details and autostart of default bridged network. Creating that is
      now the default in general, yet our solution provides the following on
      top as of today:
      + nat only on some ports <port start='1024' end='65535'/>
      + autostart the default network by default
      + do not autostart if 192.168.122.0 is already taken (e.g. in containers)
    - d/p/ubuntu/Allow-libvirt-group-to-access-the-socket.patch: This is
      the group based access to libvirt functions as it was used in Ubuntu
      for quite long.
      + d/p/ubuntu/daemon-augeas-fix-expected.patch fix some related tests
        due to the group access change.
    - ubuntu/parallel-shutdown.patch: set parallel shutdown by default.
    - d/p/ubuntu/enable-kvm-spice.patch: compat with older Ubuntu qemu/kvm
      which provided a separate kvm-spice.
    - d/p/ubuntu/storage-disable-gluster-test: gluster not enabled, skip test
    - d/p/ubuntu/ubuntu-libxl-qemu-path.patch: this change was split. The
      section that adapts the path of the emulator to the Debian/Ubuntu
      packaging is kept.
    - d/p/ubuntu/ubuntu-libxl-Fix-up-VRAM-to-minimum-requirements.patch: auto
      set VRAM to minimum requirements
    - d/p/ubuntu/xen-default-uri.patch: set default URI on xen hosts
    - Add libxl log directory
    - libvirt-uri.sh: Automatically switch default libvirt URI for users on
      Xen dom0 via user profile (was missing on changelogs before)
    - d/p/ubuntu/apibuild-skip-libvirt-common.h: drop libvirt-common.h from
      included_files to avoid build failures due to duplicate definitions.
    - Update README.Debian with Ubuntu changes
    - Convert libvirt0, libnss_libvirt and libvirt-dev to multi-arch.
    - Enable some additional features on ppc64el and s390x (for arch parity)
      + systemtap, zfs, numa and numad on s390x.
      + systemtap on ppc64el.
    - fix conffile upgrade handling to avoid obsolete files
      and inactive duplicates (LP 1694159)
    - d/t/control, d/t/smoke-qemu-session: fixup smoke-qemu-session by making
      vmlinuz available and accessible (Debian bug 848314)
    - d/t/control, d/t/smoke-lxc: fix up lxc smoke test (Debian bug 848317)
    - Extended handling of apparmor profiles - clear lost profiles via cron
    - Add dnsmasq configuration to work with system wide dnsmasq (drop >18.04,
      no more UCA onto Xenial then which has global dnsmasq by default).
    - Reworked apparmor Delta, especially the more complex delta is dropped
      now, also our former delta is now split into logical pieces, has
      improved comments and is part of a continuous upstreaming effort.
      Listing related remaining changes:
      + d/p/0001-apparmor-Allow-pygrub-to-run-on-Debian-Ubuntu.patch: apparmor:
        Allow pygrub to run on Debian/Ubuntu
      + d/p/0002-apparmor-libvirt-qemu-Allow-macvtap-access.patch: apparmor,
        libvirt-qemu: Allow macvtap access
      + d/p/0003-apparmor-libvirt-qemu-Allow-read-access-to-overcommi.patch:
        apparmor, libvirt-qemu: Allow read access to overcommit_memory
      + d/p/0004-apparmor-Explicit-deny-for-setpcap.patch: apparmor: Explicit
        deny for setpcap
      + d/p/0005-apparmor-libvirt-qemu-Allow-use-of-sgabios.patch: apparmor,
        libvirt-qemu: Allow use of sgabios
      + d/p/0006-apparmor-libvirt-qemu-Silence-lttng-related-deny-mes.patch:
        apparmor, libvirt-qemu: Silence lttng related deny messages
      + d/p/0007-apparmor-libvirt-qemu-Allow-owner-read-access-to-PRO.patch:
        apparmor, libvirt-qemu: Allow owner read access to @{PROC}/*/auxv
      + d/p/0008-apparmor-libvirt-qemu-Allow-read-access-to-sysfs-sys.patch:
        apparmor, libvirt-qemu: Allow read access to sysfs system info
      + d/p/0009-apparmor-libvirt-qemu-Allow-read-access-to-max_mem_r.patch:
        apparmor, libvirt-qemu: Allow read access to max_mem_regions
      + d/p/0010-apparmor-libvirt-qemu-Allow-qemu-block-extra-librari.patch:
        apparmor, libvirt-qemu: Allow qemu-block-extra libraries
      + d/p/0011-apparmor-libvirt-qemu-Allow-access-to-hugepage-mount.patch:
        apparmor, libvirt-qemu: Allow access to hugepage mounts
      + d/p/0012-apparmor-libvirtd-Allow-access-to-netlink-sockets.patch:
        apparmor, libvirtd: Allow access to netlink sockets
      + d/p/0013-apparmor-Add-rules-for-mediation-support.patch:
        apparmor: Add rules for mediation support
      + d/p/0014-apparmor-virt-aa-helper-Improve-comment-about-backin.patch:
        apparmor, virt-aa-helper: Improve comment about backing store
      + d/p/0015-apparmor-virt-aa-helper-Allow-access-to-ecryptfs-fil.patch:
        apparmor, virt-aa-helper: Allow access to ecryptfs files
      + d/p/0016-apparmor-libvirtd-Allow-ixr-to-var-lib-libvirt-virtd.patch:
        apparmor, libvirtd: Allow ixr to /var/lib/libvirt/virtd*
      + d/p/0017-apparmor-virt-aa-helper-Allow-access-to-tmp-director.patch:
        apparmor, virt-aa-helper: Allow access to tmp directories
      + d/p/0018-apparmor-virt-aa-helper-Add-ipv6-network-policy.patch:
        apparmor, virt-aa-helper: Add ipv6 network policy
      + d/p/0019-apparmor-virt-aa-helper-Allow-access-to-sys-bus-usb-.patch:
        apparmor, virt-aa-helper: Allow access to /sys/bus/usb/devices
      + d/p/0020-apparmor-virt-aa-helper-Allow-various-storage-pools-.patch:
        apparmor, virt-aa-helper: Allow various storage pools and image
        locations
      + d/p/0021-apparmor-virt-aa-helper-Add-openvswitch-support.patch:
        apparmor, virt-aa-helper: Add openvswitch support
      + d/p/0022-apparmor-drop-references-to-qemu-kvm.patch: apparmor: drop
        references to qemu-kvm
      + d/p/0023-apparmor-qemu-won-t-call-qemu-nbd.patch: apparmor: qemu
        won't call qemu-nbd
      + d/p/0024-apparmor-virt-aa-helper-Allow-access-to-name-service.patch:
        apparmor, virt-aa-helper: Allow access to name services
      + d/p/0025-apparmor-fix-newer-virt-manager-1.4.0.patch: Add Apparmor
        permissions so virt-manager 1.4.0 viewing works (LP 1668681).
      + d/p/0026-apparmor-add-generic-base-vfio-device.patch: apparmor: add
        /dev/vfio for vf (hot) attach (LP 1680384).
      + d/p/0027-apparmor-allow-reading-cmdline-of-shutdown-signal.patch:
        apparmor: allow to parse cmdline of the pid that send the shutdown
        signal (LP 1680384).
      + (28 is a new patch, listed in added changes)
      + d/p/0029-appmor-libvirt-qemu-Add-9p-support.patch: appmor,
        libvirt-qemu: Add 9p support
      + d/p/0030-virt-aa-helper-Complete-9p-support.patch: virt-aa-helper:
        add l to 9p file options.
      + d/p/0031-virt-aa-helper-Ask-for-no-deny-rule-for-readonly-dis.patch:
        virt-aa-helper: Ask for no deny rule for readonly disk (renamed and
        reworded, was virt-aa-helper-no-explicity-deny-for-basefiles.patch)
      + d/p/0032-apparmor-libvirt-qemu-Allow-reading-charm-specific-c.patch:
        apparmor, libvirt-qemu: Allow reading charm-specific ceph config
      + d/p/0033-UBUNTU-only-apparmor-for-kvm.powerpc-LP-1680384.patch: allow
        commands executed by ubuntu only kvm wrapper on ppc64el (LP 1686621).
      + d/p/0034-apparmor-virt-aa-helper-access-for-snapped-nova.patch:
        apparmor, virt-aa-helper: access for snapped nova
    - remaining but updated to match the latest release
      + d/p/Disable-use-of-namespaces-by-default.patch (Debian change)
      + d/p/Reduce-udevadm-settle-timeout-to-10-seconds.patch (Debian change)
      + d/p/debian/apparmor_profiles_local_include.patch Include local
        apparmor profile (Debian change)
      + d/p/ubuntu/ubuntu_machine_type.patch: accept ubuntu types as pci440fx
      + d/test/smoke-lxc workaround for debbug 848317/867379
  * Dropped Changes (Upstream):
    - Add missing apparmor rule for debug-threads feature (LP 1615550).
    - Add new block device types to virt-aa-helpers profile (LP 1641618)
    - d/p/ubuntu/storage-default-permission-mode-to-0711: safer default perms
      for storage dirs like /var/lib/libvirt/images.
    - d/p/ubuntu/libvirtd-service-nolimit.patch: remove proc/file/task limits
      to support huge systems.
    - d/p/ubuntu/libvirtd-service-set-notifyaccess.patch: set NotifyAccess=all
      in libvirtd.service (-d not allowed to be specified, everything else
      upstream so drop delta; LP 1574566).
    - d/p/ubuntu/qemu_process-spice-don-t-release-used-port.patch: qemu_process
      spice: don't release used port (LP 1697729).
    - d/p/ubuntu/virsh-maxvcpu-fall-back-to-old-command.patch: virsh: maxvcpus:
      Always fall back to the old command if domain caps fail (LP 1674298)
    - d/p/ubuntu/qemu-Allow-empty-script-path-to-interface.patch: in the past
      it was possible to have <script path=''/> which now fails - fix to match
      the old behavior (LP 1665698)
    - Reworked apparmor Delta and started upstreaming, listing related
      changes dropped:
      + Apparmor feature parsing to depend on new apparmor features which
        appear in different versions across distributions (no more needed
        >=Xenial, allows to now separate changes and upstream more easily).
      + d/p/ubuntu/Ensure-disk-names-follow-the-disk-name-regex.patch:
        guarantee disk spec is following the defined regex (LP 1665410).
      + d/p/ubuntu/virt-aa-helper-add-guest-agent-rule.patch: add
        virt-aa-helper rule allowing all private channel access.
      + d/p/ubuntu/virt-aa-helper-apparmor-allow-usr-share-AAVMF-too.patch:
        virt-aa-helper to allow access to aarch64 UEFI images.
      + d/rules, apparmor: include and install local apparmor profiles (This
        is now done by dh_apparmor automatically)
      + add local apparmor override templates (provided by dh_apparmor now)
      + Fix name resolution calls from virt-aa-helper profile (LP 1546674).
      + virt-aa-helper, apparmor: allow /usr/share/OVMF/ too
      + virt-aa-helper: Generalize test for firmware paths
      + apparmor, virt-aa-helper: Allow aarch64 UEFI.
      + apparmor, libvirt-qemu: Add ppc64el related changes
      + apparmor, libvirtd: Allow libxl-save-helper to run on Debian/Ubuntu
      + apparmor, libvirt-qemu: Allow access to ceph config
      + apparmor, libvirt-qemu: Allow access to certificates used by libvirt-vnc
      + apparmor, virt-aa-helper: Explicit denies for host devices
      + apparmor, virt-aa-helper: Allow access to libnl-3 config files
      + apparmor, libvirt-qemu: allow access to pt_chown for pty consoles
  * Dropped Changes (In Debian):
    - d/rules: debhelper start virtlogd.socket
    - d/p/ubuntu/Debianize-virtlogd-service.patch: Adapt config file location
      for Debian based systems.
    - Additional debian/bug-presubj
    - Extended handling of apparmor profiles - reload and remove in maintainer
      scripts (dh_apparmor* now generate these snippets)
  * Dropped Changes (no SysV anymore):
    - Add sysvinit script for virtlockd
    - Wait on socket in sysvinit script
    - d/rules: dh_installinit virtlockd (was part of "Cleanup systemd
      debhelper"
    - d/p/ubuntu/Debianize-virtlockd-init.patch: Fix default config path in
      virtlockd.init for Debian based systems.
  * Dropped Changes (other reasons):
    - d/p/ubuntu/dnsmasq-as-priv-user: configuration to run as extra user
      This used group libvirt instead of nobody which makes it worse; Needs
      to be fixed upstream (LP: #1690729).
      + d/p/ubuntu/disable-network-test.patch: disable test failing due to
        dnsmasq changes.
    - Add .gitignore for .pc
    - we keep lxc support as Debian does, but stop adding delta. It feels
      somewhat less maintained than e.g. libvirt for qemu. Also for secure
      and comfortable container management lxd is clearly preferred. The
      delta caused more issues than it solved so deliver libvirt-lxc as-is
      and drop the related delta.
      + d/p/ubuntu/9031-enable-lxc-apparmor: enable apparmor confinement of
        containers by default.
      + d/p/ubuntu/9032-lxc-allow-no-security-driver: allow empty sec driver
        for libvirt-lxc.
    - The following xen changes are no more required with current versions
      + d/p/ubuntu/ubuntu-libxl-hvmloader-path.patch: Fallback for libxl
        xen paths (LP 1459603)
      + d/p/ubuntu/ubuntu-libxl-qemu-path.patch: this change was split. The
        section about compat to the very old qemu-dm name is no more needed.
      + d/p/ubuntu/libxl-fix-test-data.patch and
        d/p/ubuntu/fix-xen-xml-in-tests.patch: updated and unified into the
        former one + also updated the maintainer notes to ease updating.
      + d/p/ubuntu/libxl-no-dm-check.patch: Stop calling emulator to identify
        device-model
  * Added Changes:
    - d/p/0028-apparmor-add-default-pki-path-of-lbvirt-spice.patch:
      apparmor: add default pki path of lbvirt-spice (LP: #1690140)
    - conffile handling of files dropped in 3.5 (can be dropped >18.04)
      + /etc/init.d/virtlockd was sysv init only
      + /etc/apparmor.d/local/usr.sbin.libvirtd and
        /etc/apparmor.d/local/usr.lib.libvirt.virt-aa-helper are now generated
        by dh_apparmor as needed
    - d/p/ubuntu/fix-libxl-default-driver-name.patch: avoid an issue with
      default driver entries missing name='qemu'.

 -- Christian Ehrhardt <christian.ehrhardt@xxxxxxxxxxxxx>  Thu, 06 Jul
2017 15:43:17 +0200

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

-- 
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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:
  Fix Released
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