On Thu, Mar 08, 2012 at 11:29:48AM +0800, suyi wang wrote:

Hi all:

Hi Suyi, qemu-trivial is a mailing list for QEMU patches, questions should be directed at the regular QEMU mailing list. I have CCed qemu-devel and libvirt-list so your question will go to the QEMU and libvirt communities. Are you sure your libvirt configuration allows the QEMU process to access /dev/shm? You may have SELinux enabled. Stefan

I tried kvm on my ubuntu with the libvirt.xml file as follows: <domain type='kvm'> <name>instance-00000011</ name> <memory>2097152</memory> <os> <type>hvm</type> <boot dev="hd" /> </os> <features> <acpi/> </features> <vcpu>1</vcpu> <devices> <sound model='ac97'/> <input type='tablet' bus='usb'/> <disk type='file'> <driver type='qcow2'/> <source file='/opt/stack/nova/nova/../ /instances/instance-00000011/disk'/> <target dev='vda' bus='ide'/> </disk> <disk type='file'> <driver type='qcow2'/> <source

- Ignored: file='/opt/stack/nova/nova/..//instances/instance-00000011/disk.local'/> <target dev='vdb' bus='ide'/> </disk>

<interface type='bridge'> <source bridge='br100'/> <mac address='02:16:3e:44:a1:dd'/> <filterref filter="nova-instance-instance-00000011-02163e44a1dd"> <parameter name="IP" value="10.0.0.2" /> <parameter name="DHCPSERVER" value="10.0.0.1" /> </filterref> </interface>

<!-- The order is significant here. File must be defined first --> <serial type="file"> <source path='/opt/stack/nova/nova/..//instances/instance-00000011/console.log'/> <target port='1'/> </serial>

<console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target port='0'/> </console>

<serial type='pty'> <source path='/dev/pts/2'/> <target port='0'/> </serial>

<graphics type='vnc' port='-1' autoport='yes' keymap='en-us' listen='0.0.0.0'/>

</devices> </domain>

So it works well.

Howerver, I want change the remote access method by spice, I simply changed the libvirt.xml as follows: <domain type='kvm'> <name>instance-00000011</name> <memory>2097152</memory> <os> <type>hvm</type> <boot dev="hd" /> </os> <features> <acpi/> </features> <vcpu>1</vcpu> <devices> <sound model='ac97'/> <input type='tablet' bus='usb'/> <disk type='file'> <driver type='qcow2'/> <source file='/opt/stack/nova/nova/..//instances/instance-00000011/disk'/> <target dev='vda' bus='ide'/> </disk> <disk type='file'> <driver type='qcow2'/> <source file='/opt/stack/nova/nova/..//instances/instance-00000011/disk.local'/> <target dev='vdb' bus='ide'/> </disk>

<interface type='bridge'> <source bridge='br100'/> <mac address='02:16:3e:44:a1:dd'/> <filterref filter="nova-instance-instance-00000011-02163e44a1dd"> <parameter name="IP" value="10.0.0.2" /> <parameter name="DHCPSERVER" value="10.0.0.1" /> </filterref> </interface>

<!-- The order is significant here. File must be defined first --> <serial type="file"> <source path='/opt/stack/nova/nova/..//instances/instance-00000011/console.log'/> <target port='1'/> </serial>

<console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target port='0'/> </console>

<serial type='pty'> <source path='/dev/pts/2'/> <target port='0'/> </serial>

<graphics type='spice' port='-1' autoport='yes' keymap='en-us' listen='0.0.0.0'/>

</devices> </domain>

As you can see, I just change <graphics type='vnc' port='-1' autoport='yes' keymap='en-us' listen='0.0.0.0'/> to <graphics type='spice' port='-1' autoport='yes' keymap='en-us' listen='0.0.0.0'/> , But it called the error as follows:

libvirtError: internal error Process exited while reading console log output: char device redirected to /dev/pts/12 TRACE: do_spice_init: starting 0.8.1 TRACE: do_spice_init: statistics shm_open failed, Permission denied"

Then I also tried "ls -ld /dev/shm" , yes, it is already 777. then my problem remained: libvirtError: internal error Process exited while reading console log output: char device redirected to /dev/pts/12 TRACE: do_spice_init: starting 0.8.1 TRACE: do_spice_init: statistics shm_open failed, Permission denied"

I wish someone can give me some help! Thanks!

-- Yours. suyi