[PyWPS-dev] running in production on windows - funding proposal

Mon Jul 6 01:07:01 PDT 2020

Hi Jachym,

Thanks for your detailed reply!
Personally I don't have much experience with running windows services
either.

OSGeo4W Apache2 package seems unavailable.
https://trac.osgeo.org/osgeo4w/wiki/pkg-apache
The package link itself is dead and the page was modified 10 years ago,
with no contact info.

On the other hand there seems to be a few binary distributions of Apache2
on its official website:
http://httpd.apache.org/docs/current/platform/windows.html#down

Kind regards,
Idan

On Mon, 6 Jul 2020 at 10:21, Jachym Cepicky <jachym.cepicky at gmail.com>
wrote:

> Hi Idan,
>
> this is the first time, some publicly stepped for funding a new
> feature of PyWPS and I should personally be more than happy for it.
>
> Unluckily Windows is a rather unfriendly environment and I personally
> have no clue about IIS I have to say.
>
> OSGeo4W does it somehow usable from my perspective and IIRC, there is
> Apache2 instance within OSGeo4W stack?
>
> I agree with Luis, that it used to be complicated, to run PyWPS on
> windows - I intentionally omitted to take care on this in the past.
> But meanwhile situation has changed, since we now run PyWPS in the
> background, passing tasks from SQlite database.
>
> It seems to me, that the main part, which needs modification is
>
>
> https://github.com/geopython/pywps/blob/master/pywps/processing/basic.py#L24
>
> Or maybe even
>
>
> https://github.com/geopython/pywps/blob/master/pywps/processing/__init__.py#L30
>
> adding e.g. WINDOWS modification (along with SHEDULER), which would
> use different mechanism of Job call on Windows
>
> ?
>
> Jachym
>
> ne 5. 7. 2020 v 11:10 odesílatel Idan Miara <idan at miara.com> napsal:
> >
> > Hi all,
> >
> > My employer would like to propose funding for extending pywps codebase
> to support running a pywps service in production on Windows (for instance,
> under IIS or as a windows service) in an asynchronous mode.
> > This extension shall include running a demo app with deployment
> instructions, optionally with instructions for creating a windows installer
> for a demo service. It shall be licensed under the pywps license (MIT) and
> integrated into the official pywps codebase (or at least provide a decent
> PR).
> > Currently, I am able to run this pywps demo.py example on Windows with
> the OSGeo4W python environment in synchronous mode.
> >
> > If anyone would like to step forward with a proposal or to discuss it
> further, please let me know.
> >
> > Kind regards,
> > Idan
> >
> > On Fri, 3 Jul 2020 at 10:58, Idan Miara <idan at miara.com> wrote:
> >>
> >> Hi Carsten, Luís and all,
> >>
> >> Thanks for your replies!
> >>
> >> Currently I use pywps with Docker based on gdal's official docker image
> (which is ubuntu based).
> >> https://github.com/talos-gis/talos_wps
> >> The service is still under testing but so far it looks very promising.
> >>
> >> I need to deploy it also on Windows because I need to use a customer's
> C DLL which is Windows only, so either I will need to port the DLL to Linux
> or find a way to run pywps on Windows in production.
> >>
> >> Luís wrote to me that from what he read online, all Python classes
> dealing with the Multiprocess must be modified to run on Windows, that is
> for running it in an asynchronous mode.
> >>
> >> I understand that this is not the normal setup, so I guess I will need
> to test how suitable this demo.py is for production on Windows, or look for
> some other solution.
> >>
> >> Kind regards,
> >> Idan
> >>
> >>
> >> On Fri, 3 Jul 2020 at 10:32, Carsten Ehbrecht <ehbrecht at dkrz.de> wrote:
> >>>
> >>> Hi Idan,
> >>>
> >>> PyWPS is not meant to run in production on Windows. It may still work
> … but I’m not sure.
> >>>
> >>> Using a docker container might already be a good alternative.
> >>>
> >>> There is a Flask demo with PyWPS … but outdated:
> >>> https://github.com/geopython/pywps-flask
> >>>
> >>> Usually I use a cookiecutter template to setup a new PyWPS service
> which includes docker container support:
> >>> https://github.com/bird-house/cookiecutter-birdhouse
> >>>
> >>> For a full deployment on Linux with nginx/gunicron I use an Ansible
> playbook:
> >>> https://github.com/bird-house/ansible-wps-playbook
> >>>
> >>> Currently in our projects people are mostly using the PyWPS generated
> by the cookiecutter … using Werkzeug/WSGI included in PyWPS either on the
> Linux host or in a container (for production).
> >>>
> >>> Cheers,
> >>> Carsten
> >>> --
> >>> Carsten Ehbrecht
> >>> Abteilung Datenmanagement
> >>>
> >>> Deutsches Klimarechenzentrum GmbH (DKRZ)
> >>> Bundesstraße 45 a • D-20146 Hamburg • Germany
> >>>
> >>> Phone: +49 40 460094-148
> >>> FAX:   +49 40 460094-270
> >>> Email: ehbrecht at dkrz.de
> >>> URL:   www.dkrz.de
> >>>
> >>> Geschäftsführer: Prof. Dr. Thomas Ludwig
> >>> Sitz der Gesellschaft: Hamburg
> >>> Amtsgericht Hamburg HRB 39784
> >>>
> >>> > On 1. Jul 2020, at 21:10, Idan Miara <idan at miara.com> wrote:
> >>> >
> >>> > Hi all,
> >>> >
> >>> > I have a working pywps service that is deployed successfully with a
> Linux docker using gunicorn.
> >>> > I need some pointers for running it in a production environment on
> Windows.
> >>> >
> >>> > As gunicorn is Linux only I need to find an alternative.
> >>> > I can run it on Windows with the birdhouse-workshop demo script:
> >>> >
> https://github.com/bird-house/birdhouse-workshop/blob/master/demo/demo.py
> >>> > But the demo says: "Do not use this service in a production
> environment." so I'm looking for a better solution.
> >>> > I have found also this rather complicated guide:
> >>> >
> https://stackoverflow.com/questions/5072166/how-do-i-deploy-a-flask-application-in-iis
> >>> >
> >>> > Any suggestions?
> >>> >
> >>> > Kind regards,
> >>> > Idan
> >>> > _______________________________________________
> >>> > pywps-dev mailing list
> >>> > pywps-dev at lists.osgeo.org
> >>> > https://lists.osgeo.org/mailman/listinfo/pywps-dev
> >>>
> > _______________________________________________
> > pywps-dev mailing list
> > pywps-dev at lists.osgeo.org
> > https://lists.osgeo.org/mailman/listinfo/pywps-dev
>
> --
> Jachym Cepicky
> e-mail: jachym.cepicky gmail com
> URL: http://les-ejk.cz
> GPG: http://les-ejk.cz/pgp/JachymCepicky.pgp
>
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