[openstack-dev] [nova] [placement] Which service is using port 8778?

Sylvain Bauza sbauza at redhat.com
Tue Dec 20 14:43:12 UTC 2016

Le 20/12/2016 14:30, Jay Pipes a écrit :
> On 12/20/2016 08:03 AM, Sean Dague wrote:
>> On 12/20/2016 07:53 AM, Sylvain Bauza wrote:
>>> Le 20/12/2016 10:26, Sylvain Bauza a écrit :
>>>> Le 20/12/2016 10:20, Chris Dent a écrit :
>>>>> On Tue, 20 Dec 2016, Sylvain Bauza wrote:
>>>>>> Before moving forward and picking yet another port that could trample
>>>>>> another service, I'd rather prefer first that Senlin jobs would
>>>>>> temporarely disable the placement-* services so that the gate
>>>>>> would be
>>>>>> happy, while in the same time we try to identify a free port
>>>>>> number that
>>>>>> the placement API can safely bind.
>>>>> Another option here may be to not have the placement api bind to two
>>>>> ports. The current set up binds 8778 with the API at /, but what's
>>>>> registered in the service catalog is port 80 with the API at
>>>>> /placement.
>>>>> So perhaps only use the and disable the
>>>>> virtualhost that listens on 8778?
>>>>> I'd experiment with this myself but I'm going to be away from a
>>>>> compute all day. If people think it is a good idea but nobody has a
>>>>> chance to do it today I'll look into it tomorrow.
>>>> Oh good catch. Since we register the service catalog with port 80, then
>>>> there is no reason to consume an application port.
>>>> Chris, don't worry, I'll play with that today.
>>> So, after some investigation, I totally understand why we're using
>>> virtualhosts for running the WSGI apps corresponding to each service,
>>> since we want to keep the service catalog entries unchanged if the
>>> operator wants to move from eventlet to mod_wsgi.
>>> Given that devstack was deploying a service catalog entry pointing to
>>> HTTP port, should we just assume to drop the use of port 8778 ?
>>> I'm a bit afraid of any possible impact it could have for operators
>>> using the placement API with the virtualhost support which also provide
>>> a WSGI daemon mode compared to the embedded mode that is executing calls
>>> to :80/placement...
>>> Thoughts ? I mean, I can do the cut and drop that, but that will
>>> certainly have impact for other deployers that were reproducing the
>>> devstack install, like for TripleO :
>>> https://review.openstack.org/#/c/406300/13/manifests/wsgi/apache_placement.pp
>> Yes, we should stop with the magic ports. Part of the reason of
>> switching over to apache was to alleviate all of that.
> +100
> -jay

Change is up, comments welcome : https://review.openstack.org/#/c/413118/


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