Openstack版本： Kilo
OS：CentOS 7 Gnome桌面版
问题：CentOS 7 计算节点上虚拟机创建失败
日志记录：/var/log/nova/nova-compute.log
2015-08-10 22:06:41.282 707 INFO nova.compute.manager [req-c4498aca-20cc-4950-8484-2ea9da8670c9 a9ba5e68a0db48fdbf5ab664f6f25ca0 a506166979e641dd9f44a25351515014 - - -] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Starting instance...
2015-08-10 22:06:41.544 707 INFO nova.compute.claims [-] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Attempting claim: memory 2048 MB, disk 20 GB
2015-08-10 22:06:41.544 707 INFO nova.compute.claims [-] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Total memory: 16049 MB, used: 2560.00 MB
2015-08-10 22:06:41.545 707 INFO nova.compute.claims [-] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] memory limit: 24073.50 MB, free: 21513.50 MB
2015-08-10 22:06:41.545 707 INFO nova.compute.claims [-] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Total disk: 49 GB, used: 20.00 GB
2015-08-10 22:06:41.546 707 INFO nova.compute.claims [-] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] disk limit not specified, defaulting to unlimited
2015-08-10 22:06:41.621 707 INFO nova.compute.claims [-] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Claim successful
2015-08-10 22:06:41.874 707 INFO nova.scheduler.client.report [-] Compute_service record updated for ('localhost.localdomain', 'localhost.localdomain')
2015-08-10 22:06:42.253 707 INFO nova.scheduler.client.report [-] Compute_service record updated for ('localhost.localdomain', 'localhost.localdomain')
2015-08-10 22:06:42.835 707 INFO nova.virt.libvirt.driver [req-5028a584-b5fb-4260-b3f8-cb145d6a2088 - - - - -] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Creating image
2015-08-10 22:06:44.116 707 INFO nova.scheduler.client.report [-] Compute_service record updated for ('localhost.localdomain', 'localhost.localdomain')
2015-08-10 22:06:57.048 707 INFO nova.virt.libvirt.firewall [req-5028a584-b5fb-4260-b3f8-cb145d6a2088 - - - - -] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Called setup_basic_filtering in nwfilter
2015-08-10 22:06:57.049 707 INFO nova.virt.libvirt.firewall [req-5028a584-b5fb-4260-b3f8-cb145d6a2088 - - - - -] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Ensuring static filters
2015-08-10 22:06:57.468 707 ERROR nova.virt.libvirt.driver [req-5028a584-b5fb-4260-b3f8-cb145d6a2088 - - - - -] Error launching a defined domain with XML: <domain type='kvm'>
<name>instance-00000006</name>
<uuid>e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c</uuid>
<metadata>
<nova:package version="2015.1.0-3.el7"/>
<nova:name>ffd</nova:name>
<nova:creationTime>2015-08-11 02:06:57</nova:creationTime>
<nova:flavor>
<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="a9ba5e68a0db48fdbf5ab664f6f25ca0">admin</nova:user>
<nova:project uuid="a506166979e641dd9f44a25351515014">adminTenant</nova:project>
</nova:owner>
<nova:root type="image" uuid="7cf6891d-e1b1-433c-8ac3-9047c251c368"/>
</nova:instance>
</metadata>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static' cpuset='0-3'>1</vcpu>
<cputune>
<shares>1024</shares>
</cputune>
<sysinfo type='smbios'>
<system>
<entry>Fedora Project</entry>
<entry>OpenStack Nova</entry>
<entry>2015.1.0-3.el7</entry>
<entry>bc3c4917-1c83-4aff-b58f-d860f485625a</entry>
<entry>e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c</entry>
</system>
</sysinfo>
<os>
<type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
<boot dev='hd'/>
<smbios mode='sysinfo'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-model'>
<model fallback='allow'/>
<topology sockets='1' cores='1' threads='1'/>
</cpu>
<clock offset='utc'>
<timer tickpolicy='delay'/>
<timer tickpolicy='catchup'/>
<timer present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver type='qcow2' cache='none'/>
<source file='/var/lib/nova/instances/e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c/disk'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</disk>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='fa:16:3e:dd:a0:44'/>
<source bridge='br100'/>
<model type='virtio'/>
<filterref filter='nova-instance-instance-00000006-fa163edda044'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<serial type='file'>
<source path='/var/lib/nova/instances/e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c/console.log'/>
<target port='0'/>
</serial>
<serial type='pty'>
<target port='1'/>
</serial>
<console type='file'>
<source path='/var/lib/nova/instances/e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c/console.log'/>
<target type='serial' port='0'/>
</console>
<channel type='pty'>
<target type='virtio'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0' keymap='en-us'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<graphics type='spice' autoport='yes' listen='0.0.0.0' keymap='en-us'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
<stats period='10'/>
</memballoon>
</devices>
</domain>
2015-08-10 22:06:57.469 707 ERROR nova.compute.manager [req-5028a584-b5fb-4260-b3f8-cb145d6a2088 - - - - -] [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Instance failed to spawn
2015-08-10 22:06:57.469 707 TRACE nova.compute.manager [instance: e8b32dc2-4dd1-4956-9cab-a6c6c0d5655c] Traceback (most recent call last):