Qemu Quick Ref + KVM + Virsh

1 facts

• get disks

virsh domblklist $VM

• disk info

qemu-img info $VM_IDISK

• get ip adress of vm

virsh qemu-agent-command $VM '{"execute":"guest-network-get-interfaces"}' | python3 -mjson.tool | grep ip-address

2 resize

• resize image

qemu-img resize $VM_IDISK 100G

3 convert

• Error: Cannot store dirty bitmaps in qcow2 v2 files

qemu-img convert -O qcow2 -o compat=1.1 old-image.qcow2 new-image.qcow2

4 snapshot

• list snapshots with virsh

virsh snapshot-list $VM

• commit snapshot from online vm

virsh blockcommit $VM $VM_IDISK --active --pivot --verbose

• commit snapshot from powered-off vm

qemu-img commit $VM_DISK_DELTA_FILE

• delete snapshot meta data

virsh snapshot-delete $VM snap_name --metadata

• delete snapshot within qcow2 file

qemu-img snapshot -d $SNAP_NAME $VM_DISK