This is useful when you have multiple guests and want to access them using simple hostnames, like vm1.libvirt instead of memorizing their IP addresses.First, configure libvirt's default network. To start it use:Virsh -connect=qemu:///system net-start defaultTo make the default network start automatically use:Virsh -connect=qemu:///system net-autostart defaultIn order for things to work this way you need to have the recommended packages dnsmasq-base, bridge-utils and iptables installed.After the default network is setup, you can configure libvirt's DNS server dnsmasq, so that you can access the guests using their host names. This network is not automatically started. VMs using this network end up in 192.168.122.1/24 and DHCP is provided to them via dnsmasq. This network is available only for the system domains (that is VMs created by root or using the qemu:///system connection URI). This setup allows guests to access the Internet (if there is an internet connection on the host), but will not allow the host or other machines on the host's LAN to see and access the guests.If you use libvirt to manage your VMs, libvirt provides a NATed bridged network named "default" that allows the host to communicate with the guests.Note, the IP address must correspond to libvirt's default network address. This can be done by creating a configuration file /etc/NetworkManager/dnsmasq.d/libvirt_dns.conf with the following content:Libvirt here is the domain name you set in the configuration of libvirt's default network. First, tell NetworkManager to start its own version of dnsmasq by creating a configuration file /etc/NetworkManager/conf.d/libvirt_dns.conf with the following content:Second, tell the host's dnsmasq that for all DNS requests regarding the libvirt domain the libvirt's dnsmasq instance should be queried. For example, if you want to name a guest 'vm1', login to it and run:Sudo hostnamectl set-hostname vm1.libvirtNext, configure the host's NetworkManager, so that it uses libvirt's DNS server and correctly resolves the guests' hostnames. Setting hlocalOnly='yes' is important to make sure that requests to that domain are never forwarded upstream (to avoid request loops).The resulting network configuration should look something like this:Now configure the VM guests with their names. You can set it to something else, but make sure not to set it to local, because it may conflict with mDNS.
![]() ![]() ![]() VMs can be generated using virtinst. After the configuration, you can set using Bridge Interface br0 as the network connection in VM guest configuration.#make sure we don't get addresses on our raw deviceOnce that is correctly configured, you should be able to use the bridge on new VM deployments with:You can use the virsh(1) command to start and stop virtual machines. After the configuration, you can set using interface dummy0 (macvtap) in bridged mode as the network configuration in VM guests configuration.Ip link add link dummy0 macvlan0 type macvlan mode bridgeIfconfig macvlan0 192.168.1.2 broadcast 192.168.1.255 netmask 255.255.255.0 upIn order to let communications between host, guests and outside world, you may set up a bridge and as described at QEMU page.For example, you can modify the network configuration file /etc/network/interfaces to setup the ethernet interface eth0 to a bridge interface br0 similar as below. Keyboard doesnt work for windows 7 bootcamp macGraceful shutdown did not work: # virsh destroy VMGUESTOn the other hand, if you want to use a graphical UI to manage the VMs, choose one of the following two packages:Automatic guest management on host shutdown/startupGuest behavior on host shutdown/startup is configured in /etc/default/libvirt-guests.This file specifies whether guests should be shutdown or suspended, if they should be restarted on host startup, etc.The first parameter defines where to find running guests. Below are some frequently used commands:Start a configured VM guest "VMGUEST": # virsh start VMGUESTNotify the VM guest "VMGUEST" to gracefully shutdown: # virsh shutdown VMGUESTForce the VM guest "VMGUEST" to shutdown in case it is hung, i.e. Virtual machines can also be controlled using the kvm command in a similar fashion to QEMU.
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