[Pywps-dev] Docker extension

[Adam Laža]

Hi Jorge,

original idea was to use multiprocessing package for the deamon that
manages containers removal. However zombie processes accumulated on the
server when using multiprocessing. Using threads solved the problem - no
zombie processes remain on the server. Nevertheless I wanted to point on it
to know if it's acceptable solution for you.

Also before the PR, I would appreciate to get rid of dependency on my fork
of OWSLib where I use async/sync switch. We already discussed it at ML[1]
with Carsten. Can you guys now when you're all together merge Carsten's
solution into master of OWSLib?

Cheers,
A.

[1] https://lists.osgeo.org/pipermail/owslib-devel/2018-January/000304.html

2018-03-22 16:22 GMT+01:00 Jorge Mendes de Jesus <jorge.dejesus at geocat.net>:

> Hi Adam
> Stilll didnt had the problem  to look what you did on on your fork,
>
> We added your email to the issue concerning containers, so that we keep
> track
> https://github.com/geopython/pywps/issues/61
>
> If the problems with threads are solved when you can request a PR and we
> will merge it
>
> Cheers
> Jorge
>
>
> On Mon, Mar 12, 2018 at 8:58 PM, Adam Laža <ad.laza32 at gmail.com> wrote:
>
>> Hi devs,
>>
>> during work on my thesis[1] I've added Docker extension to pywps. At my
>> git there is a demo server (pywps-demo with extended config file) [2]. To
>> run it with Docker extension it's necessary to use pywps[3] and OWSLib[4]
>> from my git. Also you need Docker engine to build image and create
>> container (the extension was tested only on Linux).
>>
>> I will be glad for any comment. Recently, I faced a problem with zombie
>> processes when using multiprocessing python package for deamon that manages
>> created docker containers. Eventually, I used threading[5] instead but not
>> really sure if it's the right solution. So any opinion will be appreciated.
>>
>> Cheers,
>> Adam
>>
>> [1] https://github.com/ctu-geoforall-lab-projects/dp-laza-2018/
>> blob/master/text/adam-laza-dp-2018.pdf
>> [2] https://github.com/lazaa32/pywps-flask
>> [3] https://github.com/lazaa32/pywps
>> [4] https://github.com/lazaa32/OWSLib/tree/sync_request
>> [5] https://github.com/lazaa32/pywps/blob/develop/pywps/processi
>> ng/container.py#L73
>>
>
>
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