[openstack-dev] [Nova] Issue while spawning a new VM

Zhenyu Zheng zhengzhenyulixi at gmail.com
Thu Jan 7 08:19:29 UTC 2016


Hi,

I think your RAM is OK and it is the problem with neutron, you should check
that.
Obviously your vm have been re-scheduled due to Neutron problem, As you
have only one compute node, there will be no more compute nodes, No Valid
Host will be thrown.

Kevin Zheng

On Thu, Jan 7, 2016 at 3:49 PM, Qiao,Liyong <liyong.qiao at intel.com> wrote:

> hi
> seen from your compute node log:
>
> 2016-01-06 18:02:48.630 ERROR nova.scheduler.utils [req-b2b1c8af-91ce-4f8f-a8ba-331cf295b4fc admin demo] [instance: 7b10291a-3043-4b88-99c7-45cece0fa55c] Error from last host: controller (node controller): [u'Traceback (most recent call last):\n', u'  File "/opt/stack/nova/nova/compute/manager.py", line 1902, in _do_build_and_run_instance\n    filter_properties)\n', u'  File "/opt/stack/nova/nova/compute/manager.py", line 2066, in _build_and_run_instance\n    instance_uuid=instance.uuid, reason=six.text_type(e))\n', u"RescheduledException: Build of instance 7b10291a-3043-4b88-99c7-45cece0fa55c was re-scheduled: *Error during following call to agent: *['ovs-vsctl', '--timeout=120', '--', '--if-exists', 'del-port', u'qvo72d62525-21', '--', 'add-port', 'br-int', u'qvo72d62525-21', '--', 'set', 'Interface', u'qvo72d62525-21', u'external-ids:iface-id=72d62525-21a7-4dae-93e0-7c81abd93713', 'external-ids:iface-status=active', u'external-ids:attached-mac=fa:16:3e:cd:f7:c0', 'exter
> nal-ids:vm-uuid=7b10291a-3043-4b88-99c7-45cece0fa55c']\n"]
>
>
> so can you please check if neutron works well?
>
> BTW, I don't think no host found is due to RAM issue.
>
> Just my 2 cents.
>
> Thanks, Eli.
>
>
>
> On 2016年01月07日 15:36, Fawaz Mohammed wrote:
>
> Hi Manda,
>
> Your host has 3.7G of RAM, but not all of them available for your
> instances. If your host is in virtualized environment, try to increase the
> RAM size and choose the minimum flavor possible for your image.
>
>
> On Thu, Jan 7, 2016 at 11:04 AM, manda phaneendra <mphaneendra at gmail.com>
> wrote:
>
>> Hi,
>>
>> When i am trying to spawn a VM, i am getting the below error in nova
>> conductor log (nova conductor log is attached )
>> [image: Inline image 1]
>>
>> This is the error i am getting in the horizon UI page
>> *Error: Failed to perform requested operation on instance "vm1", the
>> instance has an error status: Please try again later [Error: No valid host
>> was found. There are not enough hosts available.].   *
>>
>>
>> My ENV details :
>>
>> This problem started coming after i install the OVS patch using the bash
>> file:
>> https://raw.githubusercontent.com/priteshk/ovs/nsh-v8/
>> third-party/start-ovs.sh
>>
>> I have gone through web and found the below problems can cause this issue.
>> 1. When Nova compute node is not running.
>>     In my env, nova compute node is running:
>>    [image: Inline image 2]
>>
>> 2. I am using qemu as hypervisor
>>      in /etc/nova/nova.conf
>>       [libvirt]
>>        inject_partition = -2
>>        live_migration_uri = qemu+ssh://root1@%s/system
>>        use_usb_tablet = False
>>        cpu_mode = none
>>        virt_type = qemu
>>
>> 3. Enough RAM is available to spawn a nano VM with cirros image.
>> [image: Inline image 3]
>>
>> Please help how to solve this problem.
>> Please let me know any other information or logs are required to find the
>> root cause and solve this problem.
>>
>> Thanks in advance :)
>>
>> --
>> Thanks & regards,
>> Phaneendra Manda.
>>
>>
>>
>>
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>>
>
>
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>
> --
> BR, Eli(Li Yong)Qiao
>
>
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