Open Stack

On Mon, Oct 9, 2017 at 9:06 AM, Georgios Dimitrakakis
<giorgis at acmac.uoc.gr> wrote:
> Hello,
>
> I think I have identified what the issue is. The problem is with images that
> have the property "hw_disk_bus='scsi'" enabled and are trying to boot or
> launch either with ephemeral disk or swap or both of them together.
>
> In order to reproduce the problem one can do the following.
>
> Download the cirros image and upload it to Glance two times (let's assume
> cirros-SCSI and cirros-VD)
> Add the "hw_disk_bus='scsi'" property to the cirros-SCSI image.
>
> Have a few flavors with the same CPU, RAM and root disk options and change
> only ephemeral and swap or both options.
>
>
> Try to launch instances using cirros-VD with any combinations of ephemeral
> or swap or both ---> No problem at all.
>
> Try to launch instances using cirros-SCSI ---> All combinations that have
> either ephemeral disk or swap disk or both of them at the same time produce
> the error: "libvirtError: unsupported configuration: Found duplicate drive
> address for disk with target name 'sda' controller='0' bus='0' target='0'
> unit='0'"
>
> The only instance that can be launched successfully when having the
> "hw_disk_bus='scsi'" property enabled on the image is one with a flavor
> without ephemeral disk and without swap.
>
> Has anyone else encountered this? Could it be considered a bug? Any ideas on
> how to solve it are mostly welcome.
>
> Best regards,
>
> G.
>

Please check out this bug: https://bugs.launchpad.net/nova/+bug/1686116

>
>
>> Hi David,
>>
>> thx for the info provided.
>>
>> I understand what "reset-state" does that's why I 've already tried
>> hard reboot but unfortunately it only brought back the instance at the
>> error state.
>>
>> What worries me more is that in the "/etc/libvirt/qemu" there are no
>> XML files for the erroneous instances, that's why the snapshot fails.
>>
>> Any ideas?
>>
>> These all appeared as soon as I 've updated to the latest Ocata version.
>>
>> Best,
>>
>> G.
>>
>>
>>> Hi G.,
>>>
>>> I dont have Ocata up anywhere, but as a "best practice", I generally
>>> do the:
>>> nova reset-state --active $UUID
>>> followed immediately by
>>> nova reboot --hard
>>>
>>> to try and "restore/resurrect" errored instances. The reset-state
>>> --active doesnt actually do anything to the instance, it just
>>> manipulates the nova db. The reboot --hard does a fairly clean
>>> "reboot" of the instance even if it is off. None of this should really
>>> have anything to do with CEPH as per se, so not sure it will have the
>>> desired outcome on your cloud though.
>>>
>>> On Sun, Oct 8, 2017 at 8:46 AM, Georgios Dimitrakakis  wrote:
>>>
>>>> Hello,
>>>>
>>>> I ve tried today to update my OpenStack installation to the latest
>>>> Ocata version.
>>>>
>>>> What I did was to shutoff all running instances, perform all
>>>> updates and then rebooted controller and compute nodes.
>>>>
>>>> All seemed to have finished successfully but unfortunately when I
>>>> tried to power on instances that had attached to them volumes (which
>>>> are provided by Ceph) I got the following error:
>>>>
>>>> libvirtError: unsupported configuration: Found duplicate drive
>>>> address for disk with target name sda controller=0 bus=0 target=0
>>>> unit=0
>>>>
>>>> and the instance status now is "Error" and "No State" as a Power
>>>> state.
>>>>
>>>> This happened only to the instances that already had volumes
>>>> attached to them. All the rest instances booted up normally.
>>>>
>>>> I have tried to reset the states of the problematic instances
>>>> using: nova reset-state --active $instance_id and then take a
>>>> snapshot of them so that I can delete and recreate them.
>>>>
>>>> Unfortunately although the state update was successful the snapshot
>>>> couldnt be taken because of this :
>>>>
>>>> InstanceNotRunning: Instance $instance_id is not running.
>>>>
>>>> Any ides of what can I do in order to start my instances again? Any
>>>> bug which is related?
>>>>
>>>> Best regards,
>>>>
>>>> G.
>>>>
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>>>
>>>
>>>
>>>
>>> Links:
>>> ------
>>> [1] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>> [2] mailto:openstack at lists.openstack.org
>>> [3] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>>> [4] mailto:giorgis at acmac.uoc.gr
>>
>>
>>
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>
>
> --
>
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