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https://issues.apache.org/jira/browse/CLOUDSTACK-8715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14980451#comment-14980451
 ] 

ASF GitHub Bot commented on CLOUDSTACK-8715:
--------------------------------------------

Github user ustcweizhou commented on the pull request:

    https://github.com/apache/cloudstack/pull/985#issuecomment-152187084
  
    succeed after the following change:
    
    diff --git 
a/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
 
b/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingReso
    index 4ce1889..59b0c3c 100755
    --- 
a/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
    +++ 
b/plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
    @@ -1994,13 +1994,13 @@ public class LibvirtComputingResource extends 
ServerResourceBase implements Serv
             final SerialDef serial = new SerialDef("pty", null, (short)0);
             devices.addDevice(serial);
    
    -        /* Add a VirtIO channel for the Qemu Guest Agent tools */
    -        devices.addDevice(new ChannelDef("org.qemu.guest_agent.0", 
ChannelDef.ChannelType.UNIX));
    -
             /* Add a VirtIO channel for SystemVMs for communication and 
provisioning */
             if (vmTO.getType() != VirtualMachine.Type.User) {
                 devices.addDevice(new ChannelDef(vmTO.getName() + ".vport", 
ChannelDef.ChannelType.UNIX,
                                                  "/var/lib/libvirt/qemu/" + 
vmTO.getName() + ".agent"));
    +        } else {
    +            /* Add a VirtIO channel for the Qemu Guest Agent tools */
    +            devices.addDevice(new ChannelDef("org.qemu.guest_agent.0", 
ChannelDef.ChannelType.UNIX));
             }
    
             final VideoDef videoCard = new VideoDef(_videoHw, _videoRam);



> Add support for qemu-guest-agent to libvirt provider
> ----------------------------------------------------
>
>                 Key: CLOUDSTACK-8715
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8715
>             Project: CloudStack
>          Issue Type: New Feature
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: KVM
>            Reporter: Sten Spans
>            Assignee: Wido den Hollander
>              Labels: kvm, libvirt, qemu, systemvm
>             Fix For: Future
>
>
> The qemu guest agent is a newer part of qemu/kvm/libvirt which exposes quite 
> a lot of useful functionality, which can only be provided by having an agent 
> on the VM. This includes things like freezing/thawing filesystems (for 
> backups), reading files on the guest, listing interfaces / ip addresses, etc.
> This feature has been requested by users, but is currently not implemented.
> http://users.cloudstack.apache.narkive.com/3TTmy3zj/enabling-qemu-guest-agent
> The first change needed is to add the following to the XML generated for KVM 
> virtual machines,:
> <channel type='unix'>
>   <source mode='bind'/>
>   <target type='virtio' name='org.qemu.guest_agent.0'/>
> </channel>
> This provides the communication channel between libvirt and the agent on the 
> host. All in all a pretty simple change to LibvirtComputingResource.java / 
> LibvirtVMDef.java
> Secondly the qemu-guest-agent package needs to be added to the systemvm 
> template.



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