On Oct 1, 2014 12:37 AM, "Adam Young" <ayo...@redhat.com> wrote:
>
> On 09/30/2014 12:21 PM, Sean Dague wrote:
>>
>> On 09/30/2014 11:58 AM, Jay Pipes wrote:
>>>
>>> On 09/30/2014 11:37 AM, Adam Young wrote:
>>>>
>>>> On 09/30/2014 11:06 AM, Louis Taylor wrote:
>>>>>
>>>>> On Tue, Sep 30, 2014 at 10:44:51AM -0400, Adam Young wrote:
>>>>>>
>>>>>> What are the uses that require long lived tokens?
>>>>>
>>>>> Glance has operations which can take a long time, such as uploading
and
>>>>> downloading large images.
>>>>
>>>> Yes, but the token is only authenticated at the start of the operation.
>>>> Does anything need to happen afterwards?
>>>
>>> Funny you mention it... :) We were just having this conversation on IRC
>>> about Nikesh's issues with some Tempest volume tests and a token
>>> expiration problem.
>>>
>>> So, yes, a Glance upload operation makes a series of HTTP calls in the
>>> course of the upload:
>>>
>>>   POST $registry/images <-- Creates the queued image record
>>>   ...  upload of chunked body of HTTP request to backend like Swift ..
>>>   PUT $registry/images/<IMAGE_ID> <-- update image status and checksum
>>>
>>> So, what seems to be happening here is that the PUT call at the end of
>>> uploading the snapshot is using the same token that was created in the
>>> keystone client of the tempest test case during the test classes'
>>> setUpClass() method, and the test class ends up running for >1 hour, and
>>> by the time the PUT call is reached, the token has expired.
>>
>> Yes... and there is this whole unresolved dev thread on this -
>>
http://lists.openstack.org/pipermail/openstack-dev/2014-September/045567.html
>>
>>         -Sean
>>
>
> This is comparable to the HEAT use case that Keystone Trusts were
originally designed to solve.
>
> If the glance client knows the roles required to perform those
operations, it could create the trust up front, with the  Glance Service
user as the trustee; the trustee execute the trust when it needs the token.
>
> Are there other cases besides the glance one that require long lived
tokens?

Cinder backups. These do many swift operations over a long period, often
hours. They should probably be converted to trusts, but I'd need some
guidance do so.
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