I am using Openstack Grizzly on ubuntu (version 1:2013.1.1-0ubuntu2~cloud0). All compute nodes use /var/lib/nova/instances directory on a shared storage. I confirmed all the steps specified on migration configuration page.

df -kh (on computes)

Filesystem Size Used Avail Use% Mounted on

/dev/sda1 332G 6.4G 309G 3% /

udev 63G 4.0K 63G 1% /dev

tmpfs 26G 548K 26G 1% /run

none 5.0M 0 5.0M 0% /run/lock

none 63G 0 63G 0% /run/shm

none 100M 0 100M 0% /run/user

cgroup 63G 0 63G 0% /sys/fs/cgroup

10.0.20.1:/export/fatih-openstack-shared 229T 537G 229T 1% /var/lib/nova/instances

10.0.20.1:/export/fatih-openstack-volume 229T 526G 229T 1% /var/lib/nova/mnt/7340a4cfb943b72a10821ea4b9732b60

nova.conf (migration related section)

live_migration_bandwidth=0

live_migration_flag= VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE

live_migration_retry_count=30

live_migration_uri=qemu+tcp://%s/system

ps -ef |grep libvirtd

root 1962 49944 0 10:24 pts/0 00:00:00 grep --color=auto libvirtd

root 55682 1 0 Jun24 ? 01:53:42 /usr/sbin/libvirtd -d -l

/etc/libvirt/libvirtd.conf:

listen_tls = 0

listen_tcp = 1

auth_tcp = "none"

When i use the following command, i get a strange error.

nova live-migration 739bf0cd-9aac-4919-b9c4-1de5d092c8a9 dest_host

Error message in nova-compute.log

2013-07-09 08:55:58.054 26690 ERROR nova.virt.libvirt.driver [-] [instance: 739bf0cd-9aac-4919-b9c4-1de5d092c8a9] Live Migration failure: internal error unable to execute QEMU command 'migrate': Block format 'qcow' used by device '' does not support feature 'live migration'

Error in libvirtd.log

2013-07-09 08:55:56.669+0000: 2206: error : qemuMonitorJSONCheckError:345 : internal error unable to execute QEMU command 'migrate': Block format 'qcow' used by device '' does not support feature 'live migration'

2013-07-09 08:55:58.044+0000: 2206: error : virNetClientProgramDispatchError:174 : An error occurred, but the cause is unknown

Following packages are installed in the compute nodes:

ii nova-common 1:2013.1.1-0ubuntu2~cloud0 all OpenStack Compute - common files

ii nova-compute 1:2013.1.1-0ubuntu2~cloud0 all OpenStack Compute - compute node

ii nova-compute-kvm 1:2013.1.1-0ubuntu2~cloud0 all OpenStack Compute - compute node (KVM)

ii nova-conductor 1:2013.1.1-0ubuntu2~cloud0 all OpenStack Compute - conductor service

ii python-nova 1:2013.1.1-0ubuntu2~cloud0 all OpenStack Compute Python libraries

ii python-novaclient 1:2.13.0-0ubuntu1~cloud0 all client library for OpenStack Compute API

ii libvirt-bin 0.9.13-0ubuntu12.2 amd64 programs for the libvirt library

ii libvirt0 0.9.13-0ubuntu12.2 amd64 library for interfacing with different virtualization systems

ii python-libvirt 0.9.13-0ubuntu12.2 amd64 libvirt Python bindings

ii kvm 1:84+dfsg-0ubuntu16+1.2.0+noroms+0ubuntu2.12.10.4 amd64 dummy transitional package from kvm to qemu-kvm

ii qemu-common 1.2.0+noroms-0ubuntu2.12.10.4 all qemu common functionality (bios, documentation, etc)

ii qemu-kvm 1.2.0+noroms-0ubuntu2.12.10.4 amd64 Full virtualization on supported hardware

ii qemu-utils 1.2.0+noroms-0ubuntu2.12.10.4 amd64 qemu utilities

ii kvm-ipxe 1.0.0+git-3.55f6c88-0ubuntu5 all PXE ROM's for KVM

Any suggestions?