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

Jay Pipes jaypipes at gmail.com
Tue Dec 20 13:30:27 UTC 2016

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.



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