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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-8715) Add support for qemu-guest-agent to libvirt provider
Date Thu, 19 May 2016 09:46:12 GMT


ASF GitHub Bot commented on CLOUDSTACK-8715:

Github user rhtyd commented on a diff in the pull request:
    --- Diff: plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/
    @@ -1978,11 +1978,16 @@ So if getMinSpeed() returns null we fall back to getSpeed().
             final SerialDef serial = new SerialDef("pty", null, (short)0);
    +        /* Add a VirtIO channel for SystemVMs for communication and provisioning */
             if (vmTO.getType() != VirtualMachine.Type.User) {
    -            final VirtioSerialDef vserial = new VirtioSerialDef(vmTO.getName(), null);
    -            devices.addDevice(vserial);
    +            devices.addDevice(new ChannelDef(vmTO.getName() + ".vport", ChannelDef.ChannelType.UNIX,
    +                                             "/var/lib/libvirt/qemu/" + vmTO.getName()
+ ".agent"));
    --- End diff --
    agree, @wido do you mind moving them something configurable via global settings or

> Add support for qemu-guest-agent to libvirt provider
> ----------------------------------------------------
>                 Key: CLOUDSTACK-8715
>                 URL:
>             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.
> The first change needed is to add the following to the XML generated for KVM virtual
> <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 /
> Secondly the qemu-guest-agent package needs to be added to the systemvm template.

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