Github user wido commented on the pull request:
https://github.com/apache/cloudstack/pull/1545#issuecomment-219152627
@swill Yes, running this in production on our cloud
I just started an Instance and the Agent (backport to 4.8, clean merge)
produced this XML:
```
<domain type='kvm'>
<name>i-2-25-VM</name>
<uuid>bd93ca81-d976-41be-823c-6fc0ea013111</uuid>
<description>Ubuntu 12.04 (64-bit)</description>
<cpu mode='host-passthrough'></cpu><sysinfo type='smbios'>
<system>
<entry name='manufacturer'>Apache Software Foundation</entry>
<entry name='product'>CloudStack KVM Hypervisor</entry>
<entry name='uuid'>bd93ca81-d976-41be-823c-6fc0ea013111</entry>
</system>
</sysinfo>
<os>
<type arch='x86_64' machine='pc'>hvm</type>
<boot dev='cdrom'/>
<boot dev='hd'/>
<smbios mode='sysinfo'/>
</os>
<on_reboot>restart</on_reboot>
<on_poweroff>destroy</on_poweroff>
<on_crash>destroy</on_crash>
<memory>4194304</memory>
<devices>
<memballoon model='none'/>
</devices>
<vcpu>2</vcpu>
<features>
<pae/>
<apic/>
<acpi/>
</features>
<cputune>
<shares>1000</shares>
</cputune>
<clock offset='utc'>
<timer name='kvmclock' >
</timer>
</clock>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<interface type='bridge'>
<source bridge='cloudbr0'/>
<mac address='06:73:12:00:00:67'/>
<model type='virtio'/>
<bandwidth>
<inbound average='128000' peak='128000'/>
<outbound average='128000' peak='128000'/>
</bandwidth>
</interface>
<console type='pty'>
<target port='0'/>
</console>
<disk device='disk' type='network'>
<driver name='qemu' type='raw' cache='writeback' />
<source protocol='rbd'
name='rbd-c01-p01/d70d7e6e-753d-4a0e-ad5f-ec8ac531e32b'>
<host name='monitor.ceph.XXXX.XXXX.XXXXX.nl' port='6789'/>
</source>
<auth username='cloudstack'>
<secret type='ceph' uuid='5e34fd37-1763-3092-9f51-280a31bdb36f'/>
</auth>
<target dev='vda' bus='virtio'/>
<serial>d70d7e6e753d4a0ead5f</serial></disk>
<disk device='disk' type='network'>
<driver name='qemu' type='raw' cache='writeback' />
<source protocol='rbd'
name='rbd-c01-p01/3fcb9970-cf63-4251-b1b9-2d916f6ab1c6'>
<host name='monitor.ceph.XXXXX.XXXXXX.XXXXXX.nl' port='6789'/>
</source>
<auth username='cloudstack'>
<secret type='ceph' uuid='5e34fd37-1763-3092-9f51-280a31bdb36f'/>
</auth>
<target dev='vdb' bus='virtio'/>
<serial>3fcb9970cf634251b1b9</serial></disk>
<disk device='cdrom' type='file'>
<driver name='qemu' type='raw' cache='none' />
<source file=''/>
<target dev='hdc' bus='ide'/>
</disk>
<serial type='pty'>
<target port='0'/>
</serial>
<graphics type='vnc' autoport='yes' listen='10.5.0.106' passwd='XXXXXXXX'/>
<channel type='unix'>
<source mode='bind'
path='/var/lib/libvirt/qemu/i-2-25-VM.org.qemu.guest_agent.0'/>
<address type='virtio-serial'/>
<target type='virtio' name='org.qemu.guest_agent.0'/>
</channel>
<input type='tablet' bus='usb'/>
</devices>
</domain>
```
There you see this channel added:
```
<channel type='unix'>
<source mode='bind'
path='/var/lib/libvirt/qemu/i-2-25-VM.org.qemu.guest_agent.0'/>
<address type='virtio-serial'/>
<target type='virtio' name='org.qemu.guest_agent.0'/>
</channel>
```
In the Ubuntu 14.04 the Guest Agent is running:
<pre>
root@vhosting-relay:~# ps aux|grep qemu
root 2789 0.0 0.0 17468 700 ? Ss 22:19 0:00
/usr/sbin/qemu-ga --daemonize -m virtio-serial -p
/dev/virtio-ports/org.qemu.guest_agent.0
root 2890 0.0 0.0 10460 908 pts/6 S+ 22:20 0:00 grep qemu
root@vhosting-relay:~#
</pre>
From the HV I can send commands through libvirt:
<pre>
[root@n06 ~]# virsh qemu-agent-command i-2-25-VM '{"execute":"guest-ping"}'
{"return":{}}
[root@n06 ~]#
</pre>
I also re-started a Console Proxy which has a additional channel, that
works as well:
```
<channel type='unix'>
<source mode='bind' path='/var/lib/libvirt/qemu/v-215-VM.agent'/>
<address type='virtio-serial'/>
<target type='virtio' name='v-215-VM.vport'/>
</channel>
<channel type='unix'>
<source mode='bind'
path='/var/lib/libvirt/qemu/v-215-VM.org.qemu.guest_agent.0'/>
<address type='virtio-serial'/>
<target type='virtio' name='org.qemu.guest_agent.0'/>
</channel>
```
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