birdhousebuilder.recipe.pywps 0.8.6

A Buildout recipe to install and configure PyWPS Web Processing Service with conda.

Introduction

birdhousebuilder.recipe.pywps is a Buildout recipe to install and configure PyWPS with Anaconda. PyWPS is a Python implementation of a Web Processing Service (WPS). PyWPS will be deployed as a Supervisor service and is available behind a Nginx web server. This recipe is used by the Birdhouse project.

Usage

The recipe requires that Anaconda is already installed. You can use the buildout option anaconda-home to set the prefix for the anaconda installation. Otherwise the environment variable CONDA_PREFIX (variable is set when activating a conda environment) is used as conda prefix.

It installs the pywps package from a conda channel in a conda environment defined by CONDA_PREFIX. The location of the intallation is given by the prefix buildout option. It setups a PyWPS output folder in ${prefix}/var/lib/pywps. It deploys a Supervisor configuration for PyWPS in ${prefix}/etc/supervisor/conf.d/pywps.conf. Supervisor can be started with ${prefix}/etc/init.d/supervisor start.

The recipe will install the nginx package from a conda channel and deploy a Nginx site configuration for PyWPS. The configuration will be deployed in ${prefix}/etc/nginx/conf.d/pywps.conf. Nginx will be started by supervisor.

By default PyWPS will be available on http://localhost:8091/wps?service=WPS&version=1.0.0&request=GetCapabilities.

The recipe depends on:

• birdhousebuilder.recipe.conda,

• birdhousebuilder.recipe.supervisor,

• birdhousebuilder.recipe.nginx and

• zc.recipe.deployment.

Supported options

The PyWPS options which are configured by buildout are explained in the PyWPS documentation.

The recipe supports the following buildout options:

anaconda-home

Buildout option pointing to the root folder of the Anaconda installation. Default: $HOME/anaconda.

Buildout options for pywps:

prefix

Deployment option to set the prefix of the installation folder. Default: /

user

Deployment option to set the run user.

etc-user

Deployment option to set the user of the /etc directory. Default: root

name

The name of your WPS project (used for config names and folder path).

hostname

The hostname of the PyWPS service (nginx). Default: localhost

http-port

The http port of the PyWPS service (nginx). Default: 8091

https-port

The https port of the PyWPS service (nginx). Default: 28091

http-output-port, output-port

The http port of the PyWPS output file service (nginx). Default: 8090

https-output-port

The https port of the PyWPS output file service (nginx). Default: 28090

workers

The number of gunicorn workers for handling requests. Default: 1

processes-import

Python package with processes.

processes-path

Path the PyWPS processes.

title

Title used for your WPS service.

abstract

Description of your WPS service.

loglevel

Logging level for PyWPS. Default: WARN

parallelprocesses

Maximum number of parallel running processes. The effective number of parallel running processes is limited by the number of cores in the hosting machine. Default: 2

maxprocesses

Maximum number of processes which are accepted in the queue. Default: 30

maxrequestsize

Maximal request size accepted in WPS process. Default: 30mb

Example usage

The following example buildout.cfg installs PyWPS with Anaconda:

[buildout]
parts = pywps

[pywps]
recipe = birdhousebuilder.recipe.pywps
name = myproject
prefix = /
user = www-data
hostname = localhost
http-port = 8091
https-port = 28091

# pywps options
processes-import = myproject.processes
processes-path = ${buildout:directory}/myproject/processes
title = MyProject ...
abstract = MyProject does ...

After installing with Buildout start the PyWPS service with:

$ cd ${prefix}
$ etc/init.d/supervisord start  # start|stop|restart
$ etc/init.d/nginx start        # start|stop|restart
$ bin/supervisorctl status      # check that pycsw is running
$ less var/log/pywps/myproject.log  # check log file

Open your browser with the following URL:

http://localhost:8091/wps?service=WPS&version=1.0.0&request=GetCapabilities

Authors

Carsten Ehbrecht ehbrecht at dkrz.de

Change History

0.8.6 (2017-02-09)

• added extra-options which replaces also the archive-root option.

• added test module test_unit.py for unit-testing.

• updated versions.cfg.

0.8.5 (2017-02-01)

• setting NCARG_ROOT in gunicorn config.

0.8.4 (2017-01-31)

• added options sethomedir and setworkdir.

0.8.3 (2017-01-16)

• added archive-root cache option.

0.8.2 (2016-12-09)

• set HOME in gunicorn config to var/lib/pywps/tmp/${name}.

• added parallelprocesses option.

• added https-output-port and http-output-port option.

• added enable-https option.

• updated Readme.

0.8.1 (2016-11-10)

• fixed wspapp.py template: using processes-import option

• using proccess-path option.

• updated Readme.

0.8.0 (2016-10-17)

• updated to pywps 4.x (new config files)

0.5.1 (2016-07-06)

• added client_body_max_size to nginx config for uploads.

0.5.0 (2016-06-30)

• using zc.recipe.deployment.

• changed cache path to var/lib/pywps/cache.

• changed tmp path to var/lib/pywps/tmp.

0.4.0 (2016-03-03)

• update to pywps 3.2.5.

• fixed wpsapp.py wsgi script.

• added missing server/debug parameter to pywps.cfg.

0.3.10 (2016-02-12)

• added maxoperations and maxfilesize to options.

0.3.9 (2016-02-08)

• updated pywps conda dependency.

0.3.8 (2016-02-04)

• configure pywps logFile in ${prefix}/var/log/pywps/.

0.3.7 (2016-01-22)

• added environment variables PATH and GDAL_DATA to bin/runwps script.

0.3.6 (2016-01-22)

• generates bin/runwps script to test pywps service.

0.3.5 (2016-01-21)

• updated pywps conda dependency.

0.3.4 (2016-01-19)

• cleaned up templates.

• added eventlet to the conda dependencies.

0.3.3 (2016-01-18)

• renamed gunicorn template.

• updated pywps.cfg for gunicron keywords template.

0.3.2 (2016-01-15)

• added gunicorn workers parameter.

• using gevent worker_class.

• using gunicorn config folder etc/gunicorn/.

0.3.1 (2016-01-05)

• using cache path var/lib/cache/.

0.3.0 (2015-12-01)

• updated to latest pywps wsgi app.

0.2.6 (2015-06-25)

• added user option for supervisor and nginx.

0.2.5 (2015-06-24)

• enabled https access.

0.2.4 (2015-06-23)

• removed unused proxyEnabled option.

• cleaned up templates.

0.2.3 (2015-05-18)

• updated supervisor config.

• log pywps to stderr/supervisor.

0.2.2 (2015-04-21)

• do not set HOME environment variable in gunicorn.

0.2.1 (2015-03-24)

• added mako_cache to pywps config.

0.2.0 (2015-02-24)

• installing in conda enviroment birdhouse.

• using $ANACONDA_HOME environment variable.

• separation of anaconda-home and installation prefix.

0.1.11 (2014-12-08)

• changed default log level.

0.1.10 (2014-12-06)

• Don’t update conda on buildout update.

• Sets PYTHONPATH in gunicon.conf.py. Used in PyWPS async processes.

0.1.9 (2014-11-26)

• Added cache section to pywps.cfg template.

0.1.8 (2014-11-03)

• GDAL_DATA added to environment in gunicorn.conf.py template.

0.1.7 (2014-08-27)

• phoenix option added for wpsoutputs.

0.1.6 (2014-08-26)

• Fixed proxy config for wpsoutputs.

0.1.5 (2014-08-23)

added cache path to nginx configuration.

0.1.4 (2014-08-17)

added /usr/local/bin to gunicorn path (needed for brew on macosx)

0.1.3 (2014-08-01)

Updated documentation.

0.1.2 (2014-07-24)

Fixed hostname in nginx template.

0.1.1 (2014-07-11)

Fixed HOME env in gunicorn template.

0.1.0 (2014-07-10)

Initial Release.