By default on every Linux distro after installing QEMU and libvirt two kinds of networking are available: NAT: VM sits behind a NAT. MACVTAP: without going into much details it acts more or less like a bridged network, except not really. One of the most annoying limitations is that host to guest communication and vice versa are not really working well. Other important things might be broken as well, like for example VRRP. …

Keepalived is a routing software written in C that can be used to setup load balancing and high availiability for Linux machines. NOTE: hypervisor is Debian 10 (Buster) with libvirt and qemu/kvm, virtual machines also are Debian 10 (Buster). Keepalived configuration Install keepalived: $ apt install keepalived Install nginx, it will be use to check that keepalived is actually working: $ apt install nginx $ systemctl enable --now nginx Configure keepalived: …