single ethernet interface eth0 + docker+kvm = ?

English Virtualization
1

Laptop.
Single ethernet interface eth0.
Is this coexist configuration ?:
NetworkManager( !wicked )
and
docker + kvm

Docker - work OK,
But kvm…:

ROOT>ystemctl status libvirtd.service -l
            ● libvirtd.service - Virtualization daemon
     Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; disabled; vendor preset: disabled)
     Active: active (running) since Fri 2022-04-08 15:55:49 +03; 6s ago
TriggeredBy: ● libvirtd-ro.socket
             ● libvirtd-admin.socket
             ● libvirtd.socket
       Docs: man:libvirtd(8)
             https://libvirt.org
   Main PID: 9198 (libvirtd)
      Tasks: 19 (limit: 32768)
     CGroup: /system.slice/libvirtd.service
             └─9198 /usr/sbin/libvirtd --timeout 120

Apr 08 15:55:49 k1 systemd[1]: Starting Virtualization daemon...
Apr 08 15:55:49 k1 libvirtd[9198]: libvirt version: 7.1.0
Apr 08 15:55:49 k1 libvirtd[9198]: hostname: k1
Apr 08 15:55:49 k1 libvirtd[9198]: Failed to initialize libnetcontrol.  Management of interface devices is disabled
Apr 08 15:55:49 k1 systemd[1]: Started Virtualization daemon.
~



ip a
....
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:df:c5:30:05 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
5: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:b5:6d:02:c5:34 brd ff:ff:ff:ff:ff:ff
    altname enp3s0f3u2
    inet 192.168.1.222/24 brd 192.168.1.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever


 nmcli con show
NAME                  UUID                                  TYPE       DEVICE  
ethcon1               XXXXXXXXXXXXXXXXXXXXX  ethernet   eth0    
docker0               YYYYYYYYYYYYYYYYYYYYY  bridge     docker0 
.................

?
Serg

2

according to this description
https://www.cyberciti.biz/faq/how-to-add-network-bridge-with-nmcli-networkmanager-on-linux/
manually created br0 and assigned it to kvm.
now . I can use docker via docker0 and kvm via br0

thanks to all.
question is resolved.

Serg

3

Finding it yourself is the most rewarding. :wink: