KVM

Links

• Homepage

Docs

• Ubuntu KVM FAQ
• Creating a KVM Ubuntu VM using Debootstrap
• FAQ
• KVM on Debian
• https://wiki.centos.org/HowTos/KVM
• Linux VM performance tuning

Hardware

Required CPU flags:

egrep '^flags.*(vmx|svm)' /proc/cpuinfo

Management tools

• https://www.linux-kvm.org/page/Management_Tools

• Virsh
• QEMU

GUI

virt-manager

Only manages connecting?

aqemu

looks promising

convirt

seems broken/gtk

CLI

vmdeboostrap

For quick debian installation. https://github.com/funollet/vmbootstrap

 

Cheatsheet

Clone a virtual machine

Copy the xml file found in /etc/libvirt/ to myclone.xml

You will problable need a new random MAC address, one way you find [here] Also generate a new uuid (todo: get script)

Edit myclone.xml: -update <name>, <uuid>, <mac address, <disk><source>

then you will probably need to change things like IP address, /etc/hostname etc.

Install to drbd

kvm -name squeeze1 -usbdevice tablet -vnc :1 -hda /dev/drbd0 -cdrom /tmp/debiansqueeze.iso  -boot d -m 384

And then use -boot c to actually boot it:

kvm -name squeeze1 -usbdevice tablet -vnc :1 -hda /dev/drbd0 -boot c -m 384

 

 

virt-install -d --name=squeeze --ram 512 --disk path=/dev/drbd/by-res/squeeze,bus=virtio,cache=none --virt-type=kvm --network bridge=br0,model=virtio --vnc --accelerate --location=http://ftp.debian.org/debian/dists/squeeze/main/installer-amd64/

and start using

kvm start squeeze

 

Grow disk

qemu-img resize <my_vm>.img +10G

Run vmdk in kvm

without converting?

FAQ

IDE controllers are unsupported for this QEMU binary or machine type

try specifying machine type