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

Silvia Fichera fichera.sil at gmail.com
Mon Jun 22 10:09:15 UTC 2015


The day before I've created several times groups of 5/6 instances and than
deleted. They were correctly launched (except for the allocation of the IP
addresses in compute hosts that are not also controller, but I thinks this
was a problem of the VTN configuration with OpenDayLight).

2015-06-22 12:01 GMT+02:00 Abhishek Shrivastava <abhishek at cloudbyte.com>:

> According to this, the Instance creation failed because the Neutron was
> not able to "create_port_postcommit" so you have to check the why it is
> happening, as I have no idea on how Neutron works.
>
> Also can you tell me how many Instances you have created before this error
> happened.
>
> On Mon, Jun 22, 2015 at 3:23 PM, Silvia Fichera <fichera.sil at gmail.com>
> wrote:
>
>> On the 19th in the morning I've done several trial, after 9.30 a.m. I
>> don't remember exactly when.
>> The day before (when I've installed it) everything was working fine.
>>
>> 2015-06-22 11:49 GMT+02:00 Abhishek Shrivastava <abhishek at cloudbyte.com>:
>>
>>> 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
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> 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
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> 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
>>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> 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
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>>
>>>>> *Thanks & Regards,*
>>>>> *Abhishek*
>>>>> *Cloudbyte Inc. <http://www.cloudbyte.com>*
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Silvia Fichera
>>>>
>>>
>>>
>>>
>>> --
>>>
>>>
>>> *Thanks & Regards,*
>>> *Abhishek*
>>> *Cloudbyte Inc. <http://www.cloudbyte.com>*
>>>
>>
>>
>>
>> --
>> Silvia Fichera
>>
>
>
>
> --
>
>
> *Thanks & Regards,*
> *Abhishek*
> *Cloudbyte Inc. <http://www.cloudbyte.com>*
>



-- 
Silvia Fichera
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