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I recently set up KVM hypervisor on my Ubuntu 18 LTS ThinkPad Carbon. I installed qemu, virt-manager, and libvirt to manage the VMs.

sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virt-manager

I have also added my user to the appropriate groups.

sudo adduser [username] libvirt
sudo adduser [username] libvirt-qemu

...and enabled virtualization in the BIOS.

However, none of the VMs I boot up have an internet connection. I assume that is because KVM is designed to be hosted on a server on a wired network, and I am trying to launch the VMs locally with only a WiFi connection.

How can I enable VMs on my laptop to have an internet connection? Do I need to install a certain driver, set up a subnetwork on Virtualization Manager, or set up a 'bridge' between the host and guest machines?

  • Your Assumption is wrong, the hypervisor doesn't care how it's connected upstream. You can set up a NATed Network in Virt-Manager using the GUI. You can also bridge with WIFI, if your Wifi-card (and AP) can do "4addr mode" (WDS). This is what i usually do for VMs on my notebook. Google, or ask more specific questions. – Alex Stragies Jan 21 at 18:05
  • I updated this question in askubuntu.com/questions/1111768/… – Justin Brunkow Jan 22 at 15:33
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I modified the default yaml file in /etc/netplan as follows:

network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp0s25:
      dhcp4: no
  bridges:
    br0:
      dhcp4: yes
      interfaces:
        - enp0s25

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