[Openstack] Error: Failed to launch instance "inst": Please try again later [Error: No valid host was found. Exceeded max scheduling attempts 3 for instance ....

Abhishek Shrivastava abhishek at cloudbyte.com
Mon Jun 22 09:49:07 UTC 2015


Hi Silvia,

One more thing, can you please tell me the exact time when you have created
the Instance.

On Mon, Jun 22, 2015 at 3:07 PM, Silvia Fichera <fichera.sil at gmail.com>
wrote:

> Hi Abhishek,
> it seems there are some errors in the log you suggested to check.
> I've attached it as a G-drive link because it's too big.
>
> Thanks
>
> Silvia​
>  screen-n-cpu.log
> <https://drive.google.com/file/d/0ByUj7Zpz-6NFR2NvVnJkOHE2Rm8/edit?usp=drive_web>
>>
> 2015-06-22 10:49 GMT+02:00 Abhishek Shrivastava <abhishek at cloudbyte.com>:
>
>> Hi Silvia,
>>
>> Look for logs in screen folder and specifically screen-n-cpu.log, or you
>> just upload the same file, will tell you accordingly the cause of error.
>>
>> On Mon, Jun 22, 2015 at 2:15 PM, Jamal Arif <jamala at plumgrid.com> wrote:
>>
>>> Silvia,
>>>
>>> Sorry about that. I missed that.
>>>
>>> If you have installed devstack, then you can use the screen sessions for
>>> checking the logs. Following is a link which provides the different
>>> commands for accessing screen sessions and the short cuts to access it.
>>>
>>> http://www.rushiagr.com/blog/2013/06/05/linux-screens-in-devstack/
>>>
>>> Thanks
>>> Jamal
>>>
>>> On Mon, Jun 22, 2015 at 1:20 AM, Silvia Fichera <fichera.sil at gmail.com>
>>> wrote:
>>>
>>>> Hi Jamal,
>>>> as I already told previously I don't have nor nova nor neutron in
>>>> /var/log because I have Installed openstack using devstack.
>>>> I will look for errors in /opt/stack/logs and, if I find somthing I
>>>> will post it.
>>>>
>>>> Thanks
>>>>
>>>> 2015-06-22 10:16 GMT+02:00 Jamal Arif <jamala at plumgrid.com>:
>>>>
>>>>> ​You can check in two places.
>>>>>
>>>>>
>>>>>    - On Controller:
>>>>>
>>>>>
>>>>> Check for neutron server logs in
>>>>> /var/log/neutron/​
>>>>>
>>>>> Check for Nova schedular etc in
>>>>> /var/log/nova/
>>>>>
>>>>>
>>>>>    - On Compute Hosts:
>>>>>
>>>>>
>>>>> Check for Nova Compute logs in
>>>>>
>>>>> /var/log/nova/nova-compute.log
>>>>>
>>>>> There can be multiple reasons for this error starting from nova
>>>>> scheduler unable to schedule them to virt-type being different in the
>>>>> nova.conf. Please check the logs and share the error logs if you are able
>>>>> to find them.
>>>>>
>>>>> Thanks
>>>>> Jamal.
>>>>>
>>>>> On Mon, Jun 22, 2015 at 12:14 AM, Silvia Fichera <
>>>>> fichera.sil at gmail.com> wrote:
>>>>>
>>>>>> Good morning.
>>>>>> As I told I can't find the folder /var/log/nova.
>>>>>> So which log should I check?
>>>>>> Thanks
>>>>>>
>>>>>> 2015-06-19 16:23 GMT+02:00 Salvatore Orlando <sorlando at nicira.com>:
>>>>>>
>>>>>>> I would check for errors in the nova compute logs.
>>>>>>>
>>>>>>> In some cases I had the same error, but the actual root cause was
>>>>>>> that the nova compute log was failing to setup networking for an instance.
>>>>>>> The request went back to the scheduler, which selected another compute
>>>>>>> node, but failed in the same way while setting up networking, and so on
>>>>>>> until failure.
>>>>>>>
>>>>>>> Salvatore
>>>>>>>
>>>>>>> On 19 June 2015 at 14:50, Silvia Fichera <fichera.sil at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Hi all, I have 4 VMs in a server, managed by ESXi. One of these
>>>>>>>> perform as OVS, one is the Openstack controller and the other two are the
>>>>>>>> compute hosts. Yesterday I set up Openstack via devstack with Opendaylight
>>>>>>>> integration for VTN. There was some issue in the VTN configuration but I
>>>>>>>> was able to create the instances. This morning I tryed again to launch the
>>>>>>>> instances before facing the other problems and there was this error:
>>>>>>>>
>>>>>>>> Error: Failed to launch instance "inst": Please try again later
>>>>>>>> [Error: No valid host was found. Exceeded max scheduling attempts 3 for
>>>>>>>> instance a12ab017-396a-46d0-9749-011b829c6273. Last exception: [u'Traceback
>>>>>>>> (most recent call last):\n', u' File
>>>>>>>> "/opt/stack/nova/nova/compute/manager.py", line 2081, in
>>>>>>>> _do_build_and_run_in].
>>>>>>>>
>>>>>>>> My VMs have the maximun availability of memory and CPU (the same as
>>>>>>>> yesterday). I tryed with a tiny flavour but there is the same error. When I
>>>>>>>> do: nova-manage service list in my controller node I have this output:
>>>>>>>>
>>>>>>>> Binary Host Zone Status State Updated_At
>>>>>>>>
>>>>>>>> nova-conductor devstack1 internal enabled :-) 2015-06-19 12:45:16
>>>>>>>>
>>>>>>>> nova-compute devstack1 nova enabled :-) 2015-06-19 12:45:08
>>>>>>>>
>>>>>>>> nova-cert devstack1 internal enabled :-) 2015-06-19 12:45:10
>>>>>>>>
>>>>>>>> nova-scheduler devstack1 internal enabled :-) 2015-06-19 12:45:10
>>>>>>>>
>>>>>>>> nova-consoleauth devstack1 internal enabled :-) 2015-06-19 12:45:14
>>>>>>>>
>>>>>>>> nova-compute devstack2 nova enabled :-) 2015-06-19 12:45:10
>>>>>>>>
>>>>>>>> nova-compute devstack3 nova enabled :-) 2015-06-19 12:45:11
>>>>>>>>
>>>>>>>> (all smiling!!)
>>>>>>>>
>>>>>>>> I have also read to check the file /var/log/nova/nova.log (if I'm
>>>>>>>> not wrong), but I can't find the directory nova inside /var/log
>>>>>>>>
>>>>>>>> Thank you
>>>>>>>>
>>>>>>>> --
>>>>>>>> Silvia Fichera
>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>> Post to     : openstack at lists.openstack.org
>>>>>>>> Unsubscribe :
>>>>>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Silvia Fichera
>>>>>>
>>>>>> _______________________________________________
>>>>>> Mailing list:
>>>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>>>>> Post to     : openstack at lists.openstack.org
>>>>>> Unsubscribe :
>>>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Silvia Fichera
>>>>
>>>
>>>
>>> _______________________________________________
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>>>
>>>
>>
>>
>> --
>>
>>
>> *Thanks & Regards,*
>> *Abhishek*
>> *Cloudbyte Inc. <http://www.cloudbyte.com>*
>>
>
>
>
> --
> Silvia Fichera
>



-- 


*Thanks & Regards,*
*Abhishek*
*Cloudbyte Inc. <http://www.cloudbyte.com>*
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