I used a recent version of the softwrae stack from Disco
- qemu 3.1
- libvirt 5.0
- openvswitch 2.11
With that I had a guest with an OVS device like that:
<interface type='bridge'>
<mac address='52:54:00:22:57:fd'/>
<source network='ovsbr0' bridge='ovsbr0'/>
<virtualport type='openvswitch'>
<parameters interfaceid='f44ac4e9-fe46-48b8-920c-7ba13dd024ba'/>
</virtualport>
<target dev='vnet1'/>
<model type='virtio'/>
<driver name='vhost' queues='4'/>
<alias name='net1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</interface>
Not too different to your's I'd think.
The OVS is trivial just having this interface atm.
$ sudo ovs-vsctl show
596674ef-e4cd-471f-9708-9caa5737961c
Bridge "ovsbr0"
Port "eno49"
Interface "eno49"
Port "ovsbr0"
Interface "ovsbr0"
type: internal
Port "vnet1"
Interface "vnet1"
ovs_version: "2.11.0"
$ ip link show dev vnet1
93: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master
ovs-system state UNKNOWN mode DEFAULT group default qlen 1000
link/ether fe:54:00:22:57:fd brd ff:ff:ff:ff:ff:ff
I have a started a second guest on the same vswitch (to check traffic
from the first guest later on).
Now lets delete that port:
$ sudo ovs-vsctl del-port ovsbr0 vnet1
$ sudo ovs-vsctl show
596674ef-e4cd-471f-9708-9caa5737961c
Bridge "ovsbr0"
Port "vnet3"
Interface "vnet3"
Port "eno49"
Interface "eno49"
Port "ovsbr0"
Interface "ovsbr0"
type: internal
ovs_version: "2.11.0"
Ok the OVS device is gone.
Obviously traffic on that interface is dead now, but the guest is still alive
and happy.
The host dev is still there:
$ ip link show dev vnet1
93: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN
mode DEFAULT group default qlen 1000
link/ether fe:54:00:22:57:fd brd ff:ff:ff:ff:ff:ff
Removing that as well as suggested
$ sudo ip link del vnet1
$ ip link show dev vnet1
Device "vnet1" does not exist.
The guest still is up and running, while traffic still won't work for obvious
reasons.
Now lets trigger the hot-unplug of the device.
$ virsh detach-device guest-openvswitch-1 net.xml
Device detached successfully
The guest is still happy and alive.
It lost the device (since we detached it) but that is ok and intentional.
** Bug watch added: Red Hat Bugzilla #1242383
https://bugzilla.redhat.com/show_bug.cgi?id=1242383
** Bug watch added: Red Hat Bugzilla #1151306
https://bugzilla.redhat.com/show_bug.cgi?id=1151306
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https://bugs.launchpad.net/bugs/1812822
Title:
Guest crashed when detaching the ovs interface device
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