howto create a new KVM guest at the CLI with virt-install

howto_virt-install_KVM-guest

source: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-guest_virtual_machine_installation_overview-creating_guests_with_virt_install

The following example installs a virtual machine from an ISO image:
# virt-install \
  --name guest1-rhel7 \
  --memory 2048 \
  --vcpus 2 \
  --disk size=8 \
  --network default \
  --cdrom /path/to/rhel7.iso \
  --os-variant rhel7


The following example imports a virtual machine from a virtual disk image:
# virt-install \
  --name guest1-rhel7 \
  --memory 2048 \
  --vcpus 2 \
  --network default \
  --disk /path/to/imported/disk.qcow \
  --import \
  --os-variant rhel7


The following example installs a virtual machine from a network location:
(The --location http://example.com/path/to/os option specifies that the installation tree is at the specified network location.)
# virt-install \
  --name guest1-rhel7 \
  --memory 2048 \
  --vcpus 2 \
  --network default \
  --disk size=8 \
  --location http://example.com/path/to/os \
  --os-variant rhel7


The following example installs a virtual machine using PXE:
(When installing a virtual machine using the PXE boot protocol, both the --network option specifying a bridged network and the --pxe option must be specified.)
# virt-install \ 
  --name guest1-rhel7 \
  --memory 2048 \
  --vcpus 2 \
  --network default \
  --disk size=8 \
  --network=bridge:br0 \
  --pxe \
  --os-variant rhel7


The following example installs a virtual machine using a kickstart file:
(The initrd-inject and the extra-args options specify that the virtual machine will be installed using a Kickstarter file.)
# virt-install \
  --name guest1-rhel7 \
  --memory 2048 \
  --vcpus 2 \
  --network default \
  --disk size=8 \
  --location http://example.com/path/to/os \
  --os-variant rhel7 \
  --initrd-inject /path/to/ks.cfg \
  --extra-args="ks=file:/ks.cfg console=tty0 console=ttyS0,115200n8"