Virtualization

Virtualization.md

KVM

Installing

Debian

• apt install qemu-kvm qemu-system qemu-utils
• apt install bridge-utils libvirt-clients libvirt-daemon-system virtinst polkitd
• apt install ovmf netcat-openbsd

More information can be found here.

Fedora

• dnf install libvirt-devel virt-top libguestfs-tools virt-manager

More information can be found here.

Red Hat Based

Commands

• Start a VM: virsh start [VM name]
• Stop a VM: virsh shutdown [VM name]
• Rename VM: virsh domrename [old name] [new name]
• Remove VM: virsh undefine --remove-all-storage [VM name]
• Running VMs: virsh list
• List all VMs: virsh list --all
• Export VM def: virsh dumpxml [VM name]
• VM image files: /var/lib/libvirt/images

Clone VM

• virt-clone -o [original] -n [new]--auto-clone
• virt-sysprep --hostname [new hostname] -d [new]

Example:

• virt-clone -o debian-server -n workstation --auto-clone
• virt-sysprep --hostname workstation -d workstation

Resize qcow2

To resize a qcow2 image:

• qemu-img resize [qcow2 file] +[size]
• cp [qcow2 file] [qcow2 new file]
• virt-resize –expand [partition] [qcow2 new file] [qcow2 file]

Example:

• qemu-img resize undercloud.qcow2 +20G
• cp undercloud.qcow2 undercloud-orig.qcow2
• virt-resize –expand /dev/sda1 undercloud-orig.qcow2 undercloud.qcow2

QEMU

• Open Up to Outside Connections /etc/libvirt/qemu.conf:

vnc_listen = 0.0.0.0

spice_listen = 0.0.0.0

• Audio /etc/libvirtd/qemu.conf:

vnc_allow_host_audio = 1

nographics_allow_host_audio = 1

Xen

Bhyve