Open Stack

Does that help ?
http://plosquare.blogspot.fr/2010/01/lvm2-snapshots-device-mapper-create.html

Nuage & Co - Razique Mahroua 
razique.mahroua at gmail.com



Le 18 sept. 2012 à 14:16, Razique Mahroua <razique.mahroua at gmail.com> a écrit :

> Interesting....
> you have a NFS share between several nodes ?
> does the nova user have the rights to write on all the directories within /var/lib/nova/instances ?
> May be a right issue...but not so sure
> 
> Nuage & Co - Razique Mahroua 
> razique.mahroua at gmail.com
> 
> <NUAGECO-LOGO-Fblan_petit.jpg>
> 
> Le 18 sept. 2012 à 11:26, romizhang1968 <romizhang1968 at 163.com> a écrit :
> 
>> additional information:
>> when I boot a new instance with centos image, system show me:
>> 
>> libvir: QEMU error : Domain not found: no domain with matching name 'instance-00000019'
>> .......
>> -4a73-b147-0c4f02191d2c] Ignoring error injecting data into image 9f595093-d52f-4b0f-8ff8-19ed98fc09f4 (Unexpected error while running command.
>> Command: sudo kpartx -d /dev/nbd15
>> Exit code: 1
>> Stdout: ''
>> Stderr: 'device-mapper: remove ioctl failed: Device or resource busy\n')
>> 2012-09-18 17:21:56 INFO nova.virt.libvirt.connection [-] [instance: 25b2e627-f37b-4a73-b147-0c4f02191d2c] Instance spawned successfully.
>> 
>> At 2012-09-17 21:18:27,"Razique Mahroua" <razique.mahroua at gmail.com> wrote:
>> Hey Romi,
>> looks like the image is not totally spawned, meaning it doesn't get added to Virsh, during the spawing, look at the /var/log/nova/nova-compute.log and look for errors.
>> Can you send the file ?
>> 
>> Nuage & Co - Razique Mahroua 
>> razique.mahroua at gmail.com
>> 
>> <NUAGECO-LOGO-Fblan_petit.jpg>
>> 
>> Le 17 sept. 2012 à 14:56, romi zhang <romizhang1968 at 163.com> a écrit :
>> 
>>> Razique,
>>>  
>>> Additional information:
>>> Another testing system was not full of testing job. I met this problem before at my small system. If I use ubuntu image download from network,this problem was not happened. If I use centos and windows image create instance,this problem will happened,and in the process of building centos or windows instance, nova-compute always promote: libvirt qemu error,domain not found. But finally instance would run normally, and then to reboot the host of nova-compute and then run nova-compute ,it would stop at :CRITICAL error: libvirt qemu error, domain not found,…..
>>>  
>>> Romi
>>>  
>>> From: romi zhang [mailto:romizhang1968 at 163.com] 
>>> Sent: Monday, September 17, 2012 8:48 PM
>>> To: 'Razique Mahroua'
>>> Cc: 'Ritesh Nanda'; 'openstack at lists.launchpad.net'
>>> Subject: RE: [Openstack] strange problem when reboot nova-compute node: domain not found: no domain with matching name
>>>  
>>> Razique,
>>>  
>>> Appreciate for your attention.
>>>  
>>> # ls /etc/libvirt/qemu/networks/autostart
>>> default.xml
>>>  
>>> at my memory,when the first time I computed the system installation, reboot  compute-node have no problem, and then after I created centos and windows instances (in the booting process,system show :libvirt qemu error: domain not found) and reboot one of compute-nodes ,nova-compute stopped and show me : CRITICAL error, Libvirt: QEMU error: Domain not found: no domain with matching name ‘instance-0000000a’. then the others also have same problem.
>>>  
>>> At my corner,it is a sysmatic behavior.
>>>  
>>> But at my another testing system, this problem had not happened.
>>>  
>>> Regards,
>>>  
>>> Romi
>>>  
>>> From: Razique Mahroua [mailto:razique.mahroua at gmail.com] 
>>> Sent: Sunday, September 16, 2012 5:04 PM
>>> To: romi zhang
>>> Cc: 'Ritesh Nanda'; openstack at lists.launchpad.net
>>> Subject: Re: [Openstack] strange problem when reboot nova-compute node: domain not found: no domain with matching name
>>>  
>>> Hey, 
>>> could you remove the flag :
>>> --resume_guests_state_on_host_boot=true
>>> ans restart the nova-compute service 
>>>  
>>> Can you run
>>> $ ls  /etc/libvirt/qemu/autostart 
>>>  
>>> Does that behaviour is systematic ? Everytime you restart the service nova-compute, or do you need to also have your compute node restarted ?
>>>  
>>>  
>>> Nuage & Co - Razique Mahroua 
>>> razique.mahroua at gmail.com
>>> 
>>> <image001.jpg>
>>>  
>>> Le 15 sept. 2012 à 12:00, romi zhang <romizhang1968 at 163.com> a écrit :
>>>  
>>> Razique,
>>>  
>>> Thank you very much!
>>>  
>>> Here is the paste:
>>> http://paste.openstack.org/show/20938/
>>>  
>>> this config was fine at the first testing system.
>>>  
>>> Current problem occurred at my second testing system, and at before I created raw format image and convert to qcow2.
>>>  
>>> I am going to recreate image directly on qcow2 format,are just in processing,……
>>>  
>>> Is there anything should be cared with image? It looks like related with the glance image,I guess.
>>>  
>>> Romi
>>>  
>>> From: Razique Mahroua [mailto:razique.mahroua at gmail.com] 
>>> Sent: Saturday, September 15, 2012 5:43 PM
>>> To: romi zhang
>>> Cc: 'Ritesh Nanda'; openstack at lists.launchpad.net
>>> Subject: Re: [Openstack] strange problem when reboot nova-compute node: domain not found: no domain with matching name
>>>  
>>> Hey I just wanted to see if the domain was still declared within virsh database
>>> in case you can also go to your instances directory and un a $ virsh define $instance-name/domain.xml
>>> Can you post your nova.conf please ?
>>>  
>>> Nuage & Co - Razique Mahroua 
>>> razique.mahroua at gmail.com
>>> 
>>> <image001.jpg>
>>>  
>>> Le 15 sept. 2012 à 08:26, romi zhang <romizhang1968 at 163.com> a écrit :
>>> 
>>> 
>>> 
>>> Hi Razique,
>>>  
>>> Is there anything need to have a deeper look?
>>> Virsh list looks like well,same as the instance I created through nova boot.
>>>  
>>> Romi
>>>  
>>> From: Razique Mahroua [mailto:razique.mahroua at gmail.com] 
>>> Sent: Friday, September 14, 2012 4:10 AM
>>> To: Ritesh Nanda
>>> Cc: romi zhang; openstack at lists.launchpad.net
>>> Subject: Re: [Openstack] strange problem when reboot nova-compute node: domain not found: no domain with matching name
>>>  
>>> Hi Romi, 
>>> what $ virsh list --all gives you ?
>>> Nuage & Co - Razique Mahroua 
>>> razique.mahroua at gmail.com
>>> 
>>> <image001.jpg>
>>>  
>>> Le 13 sept. 2012 à 21:11, Ritesh Nanda <riteshnanda09 at gmail.com> a écrit :
>>> 
>>> 
>>> 
>>> 
>>> Hello romi,
>>> 
>>>     Image got into a stuck state , only solution is to hack your database for this particular instance and mark it as deleted, den restart nova-* service, it would start working.
>>> 
>>> On Thu, Sep 13, 2012 at 9:45 PM, romi zhang <romizhang1968 at 163.com> wrote:
>>> Hi,
>>>  
>>> I’ve installed essex and when I reboot one of the nova-compute node and next when I start nova-compute service again,the system promote:
>>> Libvirt: QEMU error: Domain not found: no domain with matching name ‘instance-0000000a’
>>>  
>>> Then I found:  
>>> #ls /var/lib/nova/instances
>>> _base instance-0000000a instance-0000000b instance-0000000c
>>> #ls /etc/libvirt/qemu
>>> instance-0000000b.xml instance-0000000c.xml Network
>>>  
>>> So:
>>> /var/lib/nova/instances/instance-0000000a# virsh define libvirt.xml
>>> Domain instance-0000000a defined from libvirt.xml
>>> And:
>>> #ls /etc/libvirt/qemu
>>> Instance-0000000a.xml instance-0000000b.xml instance-0000000c.xml network
>>>  
>>> Then I restart: nova-compute &, and nova-compute could normally started.
>>> I did not understand why reboot compute node,and usually the first instance’s xml file was deleted and nova-compute will terminate.
>>>  
>>> By the way, when I create a new instance, the first line in the log also is : Libvirt: QEMU error: Domain not found: no domain with matching name ‘instance-0000000a’
>>>  
>>> Anyone who had met such a problem and why?
>>>  
>>> Regards,
>>>  
>>> romi
>>> 
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>>> 
>>> 
>>> 
>>> --
>>>  With Regards 
>>>  Ritesh Nanda
>>>  
>>>  
>>> 
>>> 
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>> 
>> 
>> 
> 

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