The RedHat documentation explains how to create a bridge but lacks an important detail: how to use it with an unprivileged QEMU VM! §

In case this network is not available it can be created by following instructions such as these or these. More info can be obtained with: $ brctl showīridge name bridge id STP enabled interfacesĥ: virbr0-nic: mtu 1500 master virbr0 state disabled priority 32 cost 100Ĥ: virbr0: mtu 1500 qdisc noqueue state DOWN group default qlen 1000 You will notice that the virtual network bridge interface is virbr0 ( vir-tual br-igde, if it helps) and assigns a DHCP address from a pool of a /24 class. If you connect to the user space ( qemu:///session), it's not there anymore. When you install QEMU and libvirtd you should have a default virtual network interface available, but only in the qemu:///system space. I will describe either by using virsh (command-line tool) and virt-manager (the GUI tool), both great tools. The official Debian Wiki, for example, completely ignores this topic.īy default, a virtual machine will be created with a 'usermode' QEMU networking device: The 'usermode' networking deviceīefore explaining the solution, I'll try to sum up all the symptoms and cues to actually understand what's happening. It is often underestimated the importance of running virtual machines as unprivileged user. Turns out I had opened another can of worms.Īs mentioned in my previous article, once you setup your QEMU/KVM virtual machine, you can only interact with it with a user interface, be it an opaque and arcane QEMU launch script, Gnome Boxes or virt-manager.īut unless your virtual machine runs with root permission (in the qemu:///system space), you will not be able to access it by any other mean. 6 July 2020 Bridge networking with QEMU based VM (KVM)Īfter learning how to create KVM based virtual machines, I had to figure out how to access them from a network interface, not only from a GUI.

Virtualbox interface for qemu