Open Stack

We just ran some tests on our production Icehouse environment and can
confirm that:

* Snapshotting an instance based on a deleted image works
* Snapshotting an instance based on a public-turned-private image works
* Block migration of an instance based on a deleted image works

This environment does not utilize _base images.

We didn't do any resizing tests as we do not have our environment
configured to allow it. At the moment, if a user tries resizing they
receive an error message. It's not a friendly way to disable an action so
we plan on just removing the option from Horizon altogether.

We also tested the following with an older Grizzly environment that
supports live migration:

* Snapshotting an instance based on a deleted image (and base image) works
* Live migrating an instance based on a deleted image (and base image) works

Resizing is not supported in this environment as well.

I'm curious about your environment where these actions are failing for you?

Thanks,
Joe

On Tue, Oct 7, 2014 at 3:03 PM, George Shuklin <george.shuklin at gmail.com>
wrote:

> Yep, this bug is still actual. Resize, migration and so on does not work
> if original image is deleted. And 'I will never remove any public image'
> will not helps, because if user restore instance from snapshot and remove
> snapshot it will cause error too. That looks stupid in the light of (our)
> raw disk format, where 'base copy' just never used.
>
> Error is harmless and can be fixed by
>
> nova reset-state --active UUID
> (optionally)
> nova stop UUID
> nova start UUID
>
> But it's still annoying because user can not fix it own instance without
> administrator intervention.
>
> We have plans to fix it for havana (it cause disturbance for as and
> inconvenience for our customers), but fix will not be accepted by upstream
> (they drops upstream support ASAP), so I think we should switch to
> old-style maillist based patch RFC.
>
> On 10/07/2014 10:16 PM, Jan van Eldik wrote:
>
>> Hi,
>>
>> Please note the issue reported in https://bugs.launchpad.net/
>> nova/+bug/1160773: "Cannot resize instance if base image is not
>> available"
>>
>> AFAIK it is still the case that instances cannot be resized or migrated
>> once the image from which it has been created has been deleted.
>>
>>   cheers, Jan
>>
>> On 10/07/2014 09:01 PM, Abel Lopez wrote:
>>
>>> Right, and I think the best thing about marking a deprecated image
>>> private is that
>>> new instances can’t select that image unless the tenant is an
>>> image-member of it.
>>> So if a specific tenant has some “real valid” need to use the old
>>> version (I can’t imagine why), they could find it in “Project Images”
>>> instead of “Public”.
>>>
>>> On Oct 7, 2014, at 11:57 AM, Sławek Kapłoński <slawek at kaplonski.pl>
>>> wrote:
>>>
>>>  Hello,
>>>>
>>>> Yes, I agree that this is not big problem when there is info "Image not
>>>> found"
>>>> in horizon but I saw this discussion and I thought that I will ask
>>>> about that
>>>> :) It would be nice to have some other info like for example: "Image 1
>>>> (archived)" or something like that :)
>>>>
>>>> ---
>>>> Best regards
>>>> Sławek Kapłoński
>>>> slawek at kaplonski.pl
>>>>
>>>> Dnia wtorek 07 październik 2014 18:21:13 piszesz:
>>>>
>>>>> I've never worried about "Image not Found", as its only a UI concern.
>>>>> IMO
>>>>> it lets the users know something has changed. Totally optional, and the
>>>>> same effect can be gained by just renaming it -OLD and leaving it
>>>>> public.
>>>>> At some point, it still needs to be removed.
>>>>>
>>>>> On Tuesday, October 7, 2014, Sławek Kapłoński <slawek at kaplonski.pl>
>>>>> wrote:
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> I use Your solution and I made old images as private in such change
>>>>>> but
>>>>>> then
>>>>>> there is one more problem: all instances spawned from that old images
>>>>>> are
>>>>>> have
>>>>>> in horizon info about image: "not found".
>>>>>> Do You maybe know how to solve that?
>>>>>>
>>>>>> ---
>>>>>> Best regards
>>>>>> Sławek Kapłoński
>>>>>> slawek at kaplonski.pl <javascript:;>
>>>>>>
>>>>>> Dnia wtorek, 7 października 2014 10:05:57 Abel Lopez pisze:
>>>>>>
>>>>>>> You are correct, deleted images are not deleted from the DB, rather
>>>>>>> their
>>>>>>> row has ‘deleted=1’, so specifying the UUID of another image already
>>>>>>> in
>>>>>>> glance for a new image being upload will end in tears.
>>>>>>>
>>>>>>> What I was trying to convey was, when Christian is uploading a new
>>>>>>> image
>>>>>>>
>>>>>>
>>>>>> of
>>>>>>
>>>>>>  the same name as an existing image, the UUID will be different. IMO,
>>>>>>> the
>>>>>>> correct process should be:
>>>>>>> 1. Make desired changes to your image.
>>>>>>> 2. Rename the existing image (e.g. Fedora-20-OLD)
>>>>>>> 3. (optional) Make the old image private ( is-public 0 )
>>>>>>> 4. Upload the new image using the desired name (e.g. Fedora-20 or
>>>>>>> like
>>>>>>> Fedora-20-LATEST )
>>>>>>>
>>>>>>> Obviously I assume there was testing for viability of the image
>>>>>>> before
>>>>>>> it
>>>>>>> was uploaded to glance.
>>>>>>>
>>>>>>> For more information, be sure to catch my talk on Tuesday 9am at the
>>>>>>>
>>>>>>
>>>>>> summit.
>>>>>>
>>>>>>  On Oct 7, 2014, at 9:58 AM, George Shuklin <george.shuklin at gmail.com
>>>>>>>
>>>>>>
>>>>>> <javascript:;>> wrote:
>>>>>>
>>>>>>> As far as I know, it is not possible to assign uuid from deleted
>>>>>>>> image
>>>>>>>>
>>>>>>>
>>>>>> to
>>>>>>
>>>>>>  the new one, because deleted images keeps their metadata in DB.>
>>>>>>>>
>>>>>>>> On 09/26/2014 04:43 PM, Abel Lopez wrote:
>>>>>>>>
>>>>>>>>> Glance images are immutable. In order to update it, you should do
>>>>>>>>> as
>>>>>>>>>
>>>>>>>>
>>>>>> you
>>>>>>
>>>>>>  are doing, but then rename the old image, then upload the updated
>>>>>>>>> one.
>>>>>>>>> Take note of the UUID as well.
>>>>>>>>>
>>>>>>>>> On Friday, September 26, 2014, Christian Berendt <
>>>>>>>>>
>>>>>>>>
>>>>>> berendt at b1-systems.de <javascript:;>>
>>>>>>
>>>>>>  wrote: I'm trying to update the contents of an image, but it looks
>>>>>>>>>
>>>>>>>>
>>>>>> like
>>>>>>
>>>>>>  it is not working at all.
>>>>>>>>>
>>>>>>>>> First I upload a test image:
>>>>>>>>>
>>>>>>>>> ---snip---
>>>>>>>>> # dd if=/dev/urandom of=testing.img bs=1M count=10
>>>>>>>>> # glance image-create --disk-format raw --container-format bare
>>>>>>>>> --name
>>>>>>>>> TESTING --file testing.img
>>>>>>>>> ---snap---
>>>>>>>>>
>>>>>>>>> Now I want to overwrite the contents of this image:
>>>>>>>>>
>>>>>>>>> ---snip---
>>>>>>>>> # dd if=/dev/urandom of=testing.img bs=1M count=20
>>>>>>>>> # glance image-update --file testing.img TESTING
>>>>>>>>> ---snap---
>>>>>>>>>
>>>>>>>>> After this call the size of the image is still the same like before
>>>>>>>>> (10485760 bytes).
>>>>>>>>>
>>>>>>>>> I do not have issues in the logfiles of glance-api and
>>>>>>>>>
>>>>>>>>
>>>>>> glance-registry.
>>>>>>
>>>>>>  What am I doing wrong?
>>>>>>>>>
>>>>>>>>> Is it not possible to update the contents of an image?
>>>>>>>>>
>>>>>>>>> Christian.
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Christian Berendt
>>>>>>>>> Cloud Solution Architect
>>>>>>>>> Mail: berendt at b1-systems.de <javascript:;>
>>>>>>>>>
>>>>>>>>> B1 Systems GmbH
>>>>>>>>> Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
>>>>>>>>> GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB
>>>>>>>>> 3537
>>>>>>>>>
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