Virsh

Docs

• https://help.ubuntu.com/community/KVM/Virsh
• http://virt-tools.org/learning/
• virsh commands cheatsheet

HOWTO

Find IP address of a guest

https://rwmj.wordpress.com/2010/10/26/tip-find-the-ip-address-of-a-virtual-machine/

 

Communicate with guest agent

virsh qemu-agent-command 

• Executing arbitrary commands in your libvirt/Qemu virtual machine through Qemu guest agent

• Using the QEMU Guest Agent with libvirt

Remove VM

virsh list
virsh destroy vmname
virsh undefine vmname
virsh vol-delete /path/to/image

FAQ

error: Requested operation is not valid: cannot undefine domain with nvram

virsh undefine --nvram yourvm

Cheatsheet

List virtual machines

virsh list

Start virtual machine

virsh start <vmname>

show resources

virsh dominfo <vmname>

show volumes

virsh vol-list default

show disk sizes

virsh pool-list --all --details

enable virsh console

systemctl enable serial-getty@ttyS0.service
systemctl start serial-getty@ttyS0.service

Centos 6, 7

To get to see bootloader:

grubby --update-kernel=ALL --args="console=ttyS0"

ON Centos 6 you need to create /etc/init/ttyS0.conf:

stop on runlevel[S016]
start on stopped rc RUNLEVEL=[2345]
respawn
instance /dev/ttyS0
exec /sbin/mingetty /dev/ttyS0

Add "ttyS0" to /etc/securetty And then run:

initctl start ttyS0