Open Stack

Hey Eric,
does from the two nodes a simple :
$ virsh list --all works ?

also, have you enabled started the TCP socket by enabling it into 
/etc/default/libvirt-bin

Before :
libvirtd_opts="-d"

After :
libvirtd_opts="-d -l"

Restart libvirtd and check the logs, by the way, you can safely ignore 
the errors about power management or install the following package :
dbus

You can also validate a manual migration by issuing the following 
command from the node 1 :
$ virsh migrate --live $domain (get by virsh list) 
qemu+tcp://user@node2/system

And check the output

Best regards,
Razique

> Eric Luo <mailto:nextfool at gmail.com>
> 28 mai 2012 08:24
> 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 
> <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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-- 
Nuage & Co - Razique Mahroua
razique.mahroua at gmail.com



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