Build a virtual machine using Libvirt on Linux

1. Preparatory work

Systemctl Disable Firewalldsystemctl stop firewalld setenforce 0hostnamectl set-hostname libvirt-manage rpm-qa|grep kvmy Um groupinstall virtual* yum install Virt-manager libvirt libvirt-python python-virtinstsystemctl status libvirtdmkdir/h Ome/vm/centos qemu-img create-f qcow2/home/vm/centos/centos.qcow2 10G VI lib.xml

2. Configure Lib.xml

<domain type= ' KVM ' >        <name>CentOS</name>  //Virtual machine name         <memory>1048576</memory> //Max memory, Unit k        <currentmemory>1048576</currentmemory> // Available memory, Unit k        <vcpu>1</vcpu> //number of virtual CPUs          <os>          < type>hvm</type>          <boot dev= ' cdrom '/ > //Disc Start        </os>        <features>         <acpi/>          <apic/>         <pae />  &nbsP;    </features>       <clock offset= ' LocalTime '/>       <on_poweroff>destroy</on_poweroff>        <on_reboot>restart</on_reboot>        <on_crash>destroy</on_crash>       <devices>          <emulator>/usr/libexec/qemu-kvm</emulator>          <disk type= ' file '  device= ' disk ' >           <driver name= ' qemu '  type= ' Qcow2 '/>            <source file= '/home/vm/centos/centos.qcow2 '/>//destination Image path<target dev= ' hda ' bus= ' ide '/> </disk> <disk type= ' file ' device= ' cdrom ' > <so Urce file= '/home/centos-7-x86_64-minimal-1511.iso '/>//put it in advance.           <target dev= ' HDB '  bus= ' IDE '/ >         </disk>         <interface type= ' bridge ' > //virtual Machine network connection mode            <source bridge= ' virbr0 '/> //name of current host bridge            <mac address= "00:16:3e:5d:aa:a8"/>          </interface>        <input type= ' Mouse '  bus= ' ps2 '/>         <graphics type= ' VNC '   Port= '-1 '  autoport= ' yes '  listen =  ' 0.0.0.0 '  keymap= ' en-US '/>        </devices>     </domain>

3. Launch the instance to get the VNC screen number

Virsh Start Centosvirsh vncdisplay CentOS

4. Start Vncviewer on WindowsDirect activation of the connection may cause the VNC window to flash backThe configuration is as follows:

Options ... > Advanced ... > Expert

Change
–fullcolour to True
–preferredencoding to Hextile

5. Connecting to VNC

Build a virtual machine using Libvirt on Linux