Make Bridge network for Virt-Manager work after installing Docker?

[kingofmanjar0]

I am not sure if I should ask this at the “Virtualisation” forum, but I will try here first. The system has only one Ethernet. I installed Virt-Manager using the official guide. Using the Advanced Network Configuration GUI, I created a new bridge. And that created a bridge0 port1 to the Ethernet section. I deleted the default Ethernet connection, and only left bridge0 port1. Virtual machines in Virt-Manager could use bridge network. Now I installed Docker from the official repository. After the installation, the VM’s could not connect to the Internet. How can I fix this?

So, in summary,

• The computer has only one Ethernet
• I had created a bridge network for VM’s in Virt-Manager, so there were only bridge0 port1 and Bridge connection1 in Network Connections. Bridge worked.
• After installing Docker and not modifying any of Docker’s network settings, Virt-Manager VM’s could not connect to the network.

Image1: Bridge connection 1 was the bridge I had manually created. After installing Docker, it automatically added others.

Image2: I added an Ethernet connection to it, bridge0 port1. In the Ethernet section, I deleted default Ethernet connection and left only bridge0 port1

Image3: Virt-Manager VM setting.

Image 4: VM cannot connect to the network

Image 5: Host computer ip addr

[zbe]

My guess is you’ll have to modify docker to use existing bridge.
Check Docker - ArchWiki

[kingofmanjar0]

Thanks. I created /etc/docker/daemon.json (did not exist) and added

{
  "bridge": "bridge0"
}

(Wiki was “br0”, but the default name that Manjaro created wa “bridge0”), rebooted the PC, and deleted other Docker-generated entries in Network Connections. VM’s could connect to the Network again. I am yet to see if Docker’s containers would work fine, but this is not an urgent issue for me.