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John Lemon
2018-Mar-13 14:16 UTC
[libvirt-users] auto propagate interface status change

<html><head></head><body><div
style="font-family: Verdana;font-size: 12.0px;"><div>
<div>Hello,</div>

<div>I&#39;m trying to automatically pass interface status changes
(e.g. LAN cable connection/disconnection, ) to a QEMU Debian virt, but the
status in the virt is always &#39;up&#39; (i.e. &#39;virsh
domif-getlink 3 macvtap0&#39; == up).</div>

<div>I&#39;v tried setting &#39;virsh domif-setlink 3 macvtap1
up&#39; or down, which works (i.e. domif-getlink==down). But I want that
state to be automatically propagated to the virt.</div>

<div>The only thing I found after hours of searching was &quot;Default
behavior if [..] unspecified is to have the link state up&quot;
[2].</div>

<div>&nbsp;</div>

<div>Do I miss something, or is this simply not integrated??</div>

<div>Best, John</div>

<div>&nbsp;</div>

<div>&nbsp;</div>

<div>&nbsp;</div>

<div>On the host this is what I observed:</div>

<div>------------------------------------------------------------------------------</div>

<div><strong>ip link show&#124;grep
enp1s0</strong><br/>
3: enp1s0: &lt;NO-CARRIER,BROADCAST,MULTICAST,UP&gt; mtu 1500 qdisc mq
state DOWN mode DEFAULT group default qlen 1000<br/>
19: macvtap1@enp1s0: &lt;NO-CARRIER,BROADCAST,MULTICAST,UP&gt; mtu 1500
qdisc pfifo_fast state LOWERLAYERDOWN mode DEFAULT group default qlen
500</div>

<div>------------------------------------------------------------------------------</div>

<div><strong>virsh domiflist 3</strong><br/>
setlocale: No such file or directory<br/>
Interface&nbsp;
Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Source&nbsp;&nbsp;&nbsp;&nbsp;
Model&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MAC<br/>
-----------------------------------------------------<br/>
macvtap0&nbsp;&nbsp; direct&nbsp;&nbsp;&nbsp;&nbsp;
enp3s0&nbsp;&nbsp;&nbsp;&nbsp;
virtio&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
00:30:d6:19:4c:8c<br/>
macvtap1&nbsp;&nbsp; direct&nbsp;&nbsp;&nbsp;&nbsp;
enp1s0&nbsp;&nbsp;&nbsp;&nbsp;
virtio&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
00:30:d6:19:2a:2d<br/>
vnet5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
network&nbsp;&nbsp;&nbsp;
vmnet0&nbsp;&nbsp;&nbsp;&nbsp;
virtio&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
52:54:00:dc:14:e4</div>

<div>------------------------------------------------------------------------------
and</div>

<div><strong>virsh domif-getlink 3
macvtap0</strong><br/>
macvtap0 up</div>

<div>&nbsp;</div>

<div>Following are stats concerning to the bug <em>report how
to</em> [1]:</div>

<ul>
	<li>The version number of the libvirt build, or SHA1 of the GIT commit
	<ul>
		<li>virsh --version -&gt; 3.0.0</li>
		<li>ii&nbsp; gir1.2-libvirt-glib-1.0:amd64&nbsp;&nbsp;
1.0.0-1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
GObject introspection files for the libvirt-glib library<br/>
		ii&nbsp;
libvirt-clients&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
3.0.0-4+deb9u1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Programs for the libvirt library<br/>
		ii&nbsp;
libvirt-daemon&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
3.0.0-4+deb9u1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Virtualization daemon<br/>
		ii&nbsp;
libvirt-daemon-system&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
3.0.0-4+deb9u1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Libvirt daemon configuration files<br/>
		ii&nbsp;
libvirt-glib-1.0-0:amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1.0.0-1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
libvirt GLib and GObject mapping library<br/>
		ii&nbsp;
libvirt0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
3.0.0-4+deb9u1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
library for interfacing with different virtualization systems<br/>
		ii&nbsp;
python-libvirt&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
3.0.0-2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
libvirt Python bindings<br/>
		ii&nbsp;
qemu-kvm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1:2.8+dfsg-6+deb9u3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
amd64&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; QEMU
Full virtualization on x86 hardware<br/>
		ii&nbsp;
virt-manager&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1:1.4.0-5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
all&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
desktop application for managing virtual machines<br/>
		ii&nbsp;
virtinst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1:1.4.0-5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
all&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Programs to create and clone virtual machines<br/>
		&nbsp;</li>
	</ul>
	</li>
	<li>The hardware architecture being used
	<ul>
		<li>x86_64</li>
	</ul>
	</li>
	<li>The name of the hypervisor (Xen, QEMU, KVM)
	<ul>
		<li>QEMU</li>
	</ul>
	</li>
	<li>The XML config of the guest domain if relevant
	<ul>
		<li>&nbsp;&nbsp;&nbsp; &lt;interface
type=&#39;direct&#39;&gt;<br/>
		&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;mac
address=&#39;00:aa:bb:cc:dd:ee&#39;/&gt;<br/>
		&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;source
dev=&#39;enp1s0&#39;
mode=&#39;passthrough&#39;/&gt;<br/>
		&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;model
type=&#39;virtio&#39;/&gt;<br/>
		&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;address
type=&#39;pci&#39; domain=&#39;0x0000&#39;
bus=&#39;0x00&#39; slot=&#39;0x03&#39;
function=&#39;0x0&#39;/&gt;<br/>
		&nbsp;&nbsp;&nbsp; &lt;/interface&gt;</li>
	</ul>
	</li>
	<li>For QEMU/KVM, the domain logfile from
/var/log/libvirt/qemu</li>
</ul>

<div>&nbsp;</div>

<div>[1] https://libvirt.org/bugs.html#quality</div>

<div>[2] https://libvirt.org/formatdomain.html#elementLink</div>
</div></div></body></html>
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