Building a VM with virt-install


Introduction

   This assumes that the network will be used in "macvtap" mode. This is
   the preferred method, as it is faster than a regular bridge and does
   not need any additional network configuration on the host.

   The disadvantage of macvtap is that host-to-vm and vm-to-host
   communication is blocked. This can be worked around with an
   "internal" switch, or by having the macvtap connection bind to a
   second interface.


Creating the VM

   The following command assumes the OS is "rhel9.1" and the network
   card is "eno1". It should be run as the root user or with sudo, and
   should be run inside tmux for safety.

      virt-install --name rhel9                                        \
         --osinfo rhel9.1                                              \
         --boot uefi                                                   \
         --cdrom /var/lib/libvirt/isos/rhel-baseos-9.1-x86_64-dvd.iso  \
         --network type=direct,source=eno1,source_mode=bridge          \
         --graphics vnc                                                \
         --autoconsole none

   Paths and names should be changed as appropriate. The VNC port can be
   found for this example by running "virsh vncdisplay rhel9".

   The disk will be created in the default location, which is normally
   /var/lib/libvirt/images. To change this, add "path=/path/file.qcow2"
   to the "--disk" option. Specify the size by adding "size=20" for a
   20 GB disk.

   For a virtio network card on Windows machines, add "model=virtio" to
   the --network option.

   Other useful options are "--ram 4096" for 4 GB RAM, and "--vcpus 2"
   for a dual-CPU guest.


Tips

   A list of supported operating systems can be found by running:

      virt-install --osinfo list