Open Stack

Hello ,all
first ,let me introduce my develop environment:
I have a computer with following lshw information

 *-cpu
      description: CPU
      product: AMD FX(tm)-6100 Six-Core Processor
      vendor: Hynix Semiconductor (Hyundai Electronics)
      physical id: 4
      bus info: cpu at 0
      version: AMD FX(tm)-6100 Six-Core Processor
      slot: Socket M2
      size: 1400MHz
      capacity: 1400MHz
      width: 64 bits
      clock: 200MHz
 *-memory
      description: System Memory
      physical id: 29
      slot: System board or motherboard
      size: 16GiB
Then ,I installed ubuntu1204 LTS .
Then,I started 3 VMs with virt-manager as my OpenStack testing cluster.I
named the 3VMs as* os0* *,os1* and* os2*.
I installed* cloud controller on os0* ,and *nova-compute on both os1 and os2
*.

I set up all the live-migration preparations instructed
here:
http://docs.openstack.org/trunk/openstack-compute/admin/content/configuring-live-migrations.html


and here:
https://help.ubuntu.com/community/SettingUpNFSHowTo

BTW:I found some error in the document ,

Update the libvirt configurations. Modify /etc/libvirt/libvirt.conf:

before : #listen_tls = 0
after : listen_tls = 0

before : #listen_tcp = 1
after : listen_tcp = 1

add: auth_tcp = "none"

here ,we should update the configuration file
/etc/libvirt/*libvirtd*.conf ,not
/etc/libvirt/libvirt.conf

After all are set ,I just use the command "*nova live-migration vm1 os2*",here
the vm1 is an instance running currently on *os1* and I wanted it to be
migrated to* os2*

the command returned without any error or infor.I guess it indicated the
migration is done correctly .But I check the vm1 with "nova show vm1",it is
still running on *os1*!
I checked the nova-compte.log file on both os1 and os2,and found the
following live_migration related* *entries  :


2012-05-28 10:26:39 DEBUG nova.rpc.amqp [-] received {u'_context_roles':
[u'admin'], u'_msg_id': u'89dfda33bb7b4dd29d93867aaf1460ec',
u'_context_read_deleted':
u'no', u'_context_request_id': u'req-f1415f26-f19e-4499-aa24-22e47b586378',
u'args': {u'instance_id': 15, u'block_migration': False, u'disk': None},
u'_context_
auth_token': '<SANITIZED>', u'_context_is_admin': True,
u'_context_project_id': u'7fa3accbd2b543a2a59c5249b8d07281',
u'_context_timestamp': u'2012-05-28T02:26:3
9.026426', u'_context_user_id': u'297ad61b9a67448186c08729ab0f1971',
u'method': *u'pre_live_migration*', u'_context_remote_address':
u'192.168.0.221'} from (pid=7
290) _safe_log /usr/lib/python2.7/dist-packages/nova/rpc/common.py:160


2012-05-28 11:22:09 DEBUG nova.service [-] *live_migration_retry_count *:
30 from (pid=16393) wait
/usr/lib/python2.7/dist-packages/nova/service.py:411

2012-05-28 11:22:09 DEBUG nova.service [-] *live_migration_uri *:
qemu+tcp://%s/system from (pid=16393) wait
/usr/lib/python2.7/dist-packages/nova/service.py:411

2012-05-28 11:22:09 DEBUG nova.service [-] *live_migration_bandwidth *: 0
from (pid=16393) wait /usr/lib/python2.7/dist-packages/nova/service.py:411


I didn't see any error  in these log files.

Then I checked the* /var/log/libvirt/libvirtd.log* on both os1 and os2.and
found the following.

2012-05-28 02:56:14.310+0000: 9481: error : virExecWithHook:328 : Cannot
find 'pm-is-supported' in path: No such file or directory
2012-05-28 02:56:14.310+0000: 9481: warning : qemuCapsInit:856 : Failed to
get host power management capabilities
2012-05-28 02:56:14.514+0000: 9480: error : virExecWithHook:328 : Cannot
find 'pm-is-supported' in path: No such file or directory
2012-05-28 02:56:14.515+0000: 9480: warning : qemuCapsInit:856 : Failed to
get host power management capabilities
2012-05-28 02:56:14.719+0000: 9482: error : virExecWithHook:328 : Cannot
find 'pm-is-supported' in path: No such file or directory
2012-05-28 02:56:14.719+0000: 9482: warning : qemuCapsInit:856 : Failed to
get host power management capabilities
2012-05-28 02:56:14.943+0000: 9484: error : virExecWithHook:328 : Cannot
find 'pm-is-supported' in path: No such file or directory
2012-05-28 02:56:14.944+0000: 9484: warning : qemuCapsInit:856 : Failed to
get host power management capabilities
2012-05-28 02:56:15.155+0000: 9481: error : virExecWithHook:328 : Cannot
find 'pm-is-supported' in path: No such file or directory
2012-05-28 02:56:15.155+0000: 9481: warning : qemuCapsInit:856 : Failed to
get host power management capabilities
2012-05-28 02:58:55.330+0000: 13514: info : libvirt version: 0.9.8
2012-05-28 02:58:55.330+0000: 13514: error : qemuMonitorIORead:513 : Unable
to read from monitor: Connection reset by peer
2012-05-28 03:02:15.618+0000: 13518: error : qemuMonitorOpenUnix:295 :
failed to connect to monitor socket: No such process
2012-05-28 03:02:15.618+0000: 13518: error : qemuProcessWaitForMonitor:1301
: internal error process exited while connecting to monitor: char device re
to /dev/pts/3
inet_listen_opts: bind(ipv4,192.168.0.205,5900): Cannot assign requested
address
inet_listen_opts: FAILED

Please note the above ,the last two lines I marked as red ,I googled the
error ,and do found something maybe related  here :
https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=703851

I know the inet_listen_opts: bind error maybe related to my VNC
settings in*/etc/nova/nova.conf
*,So I just commented all the vnc related lines in /etc/nova/nova.conf
Then I run the
 "*nova live-migration vm1 os2*" again ,and "tail
-f /var/log/nova/nova-compute.log" to both os1 and os2.I found the the
folloing:

2012-05-28 03:21:02.700+0000: 8872: error : virNetSocketReadWire:996 : End
of file while reading data: Input/output error
2012-05-28 03:21:02.700+0000: 8872: error : virNetSocketReadWire:996 : End
of file while reading data: Input/output error
2012-05-28 03:23:06.551+0000: 8879: error : virNetDevGetIndex:656 : Unable
to get index for interface vnet0: No such device
2012-05-28 03:24:36.992+0000: 8875: error :
virNetClientProgramDispatchError:174 : Unable to read from monitor:
Connection reset by peer

note that the previous inet_listen_opts:bind error is not showing this time
,but I got something new as above.


Well ,these are all problems I met.And here is my question :
1.Are these libvirt related  problems showing only because I am testing
them on a "virtual "environment? I mean ,maybe I should buy some more
physical computer?
2.If not ,what should I do with this ? Did anyone else get the same problem
as I did?.
Please help me ,thank you very much in advance!



Eric Luo
2012-05-28
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