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First I test live-migration in 12.04 with essex package. I use "nova
--debug live-migration cf62b772-2184-4262-a8dd-716a699cf86d node-1",
nova-client returns ok. But in nova-compute log, it is only show info of
"NETWORK and IPTABLES", no more info about "libvirt". I have set flags in
three libvirt files. and I use nfs too.

Then I install two nodes in my virtualbox, and use the same nfs. This time
I use 11.10 and devstack installation. After I running "nova --debug
live-migration cf62b772-2184-4262-a8dd-716a699cf86d node-1",
nova-compute show error about "libvirt", I think it is better than the
first case since of there is info about "libvirt", but I don't know how to
reslove it.

Can anyone help me?

error info:
2012-04-19 11:35:40 DEBUG nova.utils
[req-3c6527ec-6957-4948-847b-1e3996a1f628 4c96668ef8a646f58ce9585d7b465165
548b905bae5548a9b8daf6f7a7948f1d] Attempting to grab semaphore "get_dhcp"
for method "_get_dhcp_ip"... from (pid=1525) inner
/opt/stack/nova/nova/utils.py:929
2012-04-19 11:35:40 DEBUG nova.utils
[req-3c6527ec-6957-4948-847b-1e3996a1f628 4c96668ef8a646f58ce9585d7b465165
548b905bae5548a9b8daf6f7a7948f1d] Got semaphore "get_dhcp" for method
"_get_dhcp_ip"... from (pid=1525) inner /opt/stack/nova/nova/utils.py:933
2012-04-19 11:35:40 DEBUG nova.utils
[req-3c6527ec-6957-4948-847b-1e3996a1f628 4c96668ef8a646f58ce9585d7b465165
548b905bae5548a9b8daf6f7a7948f1d] Attempting to grab semaphore "get_dhcp"
for method "_get_dhcp_ip"... from (pid=1525) inner
/opt/stack/nova/nova/utils.py:929
2012-04-19 11:35:40 DEBUG nova.utils
[req-3c6527ec-6957-4948-847b-1e3996a1f628 4c96668ef8a646f58ce9585d7b465165
548b905bae5548a9b8daf6f7a7948f1d] Got semaphore "get_dhcp" for method
"_get_dhcp_ip"... from (pid=1525) inner /opt/stack/nova/nova/utils.py:933
libvir: QEMU error : internal error Process exited while reading console
log output: char device redirected to /dev/pts/2
qemu-system-x86_64: -device
rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:66:f6:93,bus=pci.0,addr=0x3:
pci_add_option_rom: failed to find romfile "pxe-rtl8139.bin"
inet_listen_opts: bind(ipv4,172.16.0.156,5900): Cannot assign requested
address
inet_listen_opts: FAILED
2012-04-19 11:35:42 DEBUG nova.rpc.amqp [-] Making asynchronous call on
network ... from (pid=1527) multicall /opt/stack/nova/nova/rpc/amqp.py:318
2012-04-19 11:35:42 DEBUG nova.rpc.amqp [-] MSG_ID is
f6c74917235f433ca65272cc72f52172 from (pid=1527) multicall
/opt/stack/nova/nova/rpc/amqp.py:321
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/eventlet/hubs/poll.py", line 97,
in wait
    readers.get(fileno, noop).cb(fileno)
  File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line
192, in main
    result = function(*args, **kwargs)
  File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 2201, in
_live_migration
    recover_method(ctxt, instance_ref, dest, block_migration)
  File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
    self.gen.next()
  File "/opt/stack/nova/nova/virt/libvirt/connection.py", line 2197, in
_live_migration
    FLAGS.live_migration_bandwidth)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 689, in
migrateToURI
    if ret == -1: raise libvirtError ('virDomainMigrateToURI() failed',
dom=self)
libvirtError: internal error Process exited while reading console log
output: char device redirected to /dev/pts/2
qemu-system-x86_64: -device
rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:66:f6:93,bus=pci.0,addr=0x3:
pci_add_option_rom: failed to find romfile "pxe-rtl8139.bin"
inet_listen_opts: bind(ipv4,172.16.0.156,5900): Cannot assign requested
address
inet_listen_opts: FAILED

Removing descriptor: 11



-- 
非淡薄无以明志，非宁静无以致远
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