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<div class="moz-cite-prefix">On 06/18/2014 04:43 PM, abhishek jain
wrote:<br>
</div>
<blockquote
cite="mid:CA+9-Lvv+_jvzEXQVRVAjEjDuw1==7zUAWvQ4qdJwGE9fO0Tq6A@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Hi <br>
<br>
</div>
<div>I'm trying to run VM using libvirt.xml file and getting
following error...<br>
<br>
</div>
<div>virsh start instance-00000003
</div>
<div><br>
error: Failed to start domain instance-00000003
<br>
error: internal error Process exited while reading console log
output: failed to launch bridge helper
<br>
kvm: -netdev bridge,br=qbr1f2191ce-38,id=hostnet0: Device
'bridge' could not be initialized<br>
</div>
</div>
</blockquote>
<br>
1) The qemu "bridge helper" is only used if you are running virsh as
a non-privileged user (i.e. non-root). Are you sure that's what you
want to do? If that really is the proper thing to do, the bridge
device would need to exist in advance of starting the domain, and
you would have to read up on the qemu bridge helper to learn how to
setup ACLs such that the uid you are using to start the domain have
permission to use the bridge helper (not using it myself, I don't
have a pointer to that info handy, but Google is your friend :-)<br>
<br>
2) it looks like this config was generated by OpenStack. Why are you
starting it via virsh? I don't use OpenStack myself, but am assuming
that a lot of the objects referenced in an OpenStack-generated
libvirt domain config are auto-created by some piece of OpenStack
code just prior to starting the domain. For example, the bridge
device (there is a separate bridge device created per guest
interface) and the filter that is applied to that interface
(likewise). I was of the impression that OpenStack instances needed
to be started from some sort of OpenStack management app, *not* from
virsh.<br>
<br>
<blockquote
cite="mid:CA+9-Lvv+_jvzEXQVRVAjEjDuw1==7zUAWvQ4qdJwGE9fO0Tq6A@mail.gmail.com"
type="cite">
<div dir="ltr">
<div><br>
<br>
</div>
<div>Below is the libvirt.xml file..<br>
<br>
domain type="kvm">
<br>
<uuid>d9f007b9-584f-41c8-a706-e096f354575b</uuid>
<br>
<name>instance-00000003</name>
<br>
<memory>524288</memory>
<br>
<vcpu>1</vcpu>
<br>
<os>
<br>
<type>hvm</type>
<br>
<kernel>/opt/stack/data/nova/instances/d9f007b9-584f-41c8-a706-e096f354575b/kernel</kernel><br>
<initrd>/opt/stack/data/nova/instances/d9f007b9-584f-41c8-a706-e096f354575b/ramdisk</initrd><br>
<cmdline>root=/dev/vda console=tty0
console=ttyS0</cmdline>
<br>
</os>
<br>
<features>
<br>
<acpi/>
<br>
<apic/>
<br>
</features>
<br>
<clock offset="utc">
<br>
<timer name="pit" tickpolicy="delay"/>
<br>
<timer name="rtc" tickpolicy="catchup"/>
<br>
</clock>
<br>
<devices>
<br>
<disk type="file" device="disk">
<br>
<driver name="qemu" type="qcow2" cache="none"/>
<br>
<source
file="/opt/stack/data/nova/instances/d9f007b9-584f-41c8-a706-e096f354575b/disk"/><br>
<target bus="virtio" dev="vda"/>
<br>
</disk>
<br>
<interface type="bridge">
<br>
<mac address="fa:16:3e:26:55:ff"/>
<br>
<model type="virtio"/>
<br>
<source bridge="qbr1f2191ce-38"/>
<br>
<target dev="tap1f2191ce-38"/>
<br>
<filterref
filter="nova-instance-instance-00000003-fa163e2655ff"/>
<br>
</interface>
<br>
<serial type="file">
<br>
<source
path="/opt/stack/data/nova/instances/d9f007b9-584f-41c8-a706-e096f354575b/console.log"/><br>
</serial>
<br>
<serial type="pty"/>
<br>
</devices>
<br>
</domain><br>
<br>
<br>
</div>
<div>Please help regarding this.<br>
</div>
<div><br>
</div>
<div>Thanks<br>
</div>
<div>Abhishek Jain<br>
</div>
</div>
<br>
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<br>
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</blockquote>
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