cc'ing pathagar list. Sameer
On Mon, Dec 16, 2013 at 8:17 AM, Miguel González <migonzal...@activitycentral.com> wrote: > I want to share with you my proposed approach to install Python web > application in XSCE. > > > The idea is to install them into a Python virtual environment isolated > from the system wide packages installed. > > If you are not familiar with Python virtualenvs, it's just a similar > concept than a chroot. It creates a new folder structure and makes > symlinks to Python executable and libraries. It also disables system > site-packages allowing to install different ones. To use the > environment it must be activated. > > Some advantages to this approach are: > > - **Isolated dependencies**. Each application can have its own > requirements, for example two applications can have different Django > versions. Also it allows a clean remove procedure because modules and > application source code are in the same dir. > > - It is a **standard solution** described in PEP 405 [1]. There are > available great tools with excellent support. For example, pip and > pip's ansible module support virtualenvs. > > As disadvantages: > > - This approach uses **more space in disk** as site packages are > installed once per application. For example Django 1.4.5 uses 45MB. > > - **rpm packages can't be used** to install Python packages in a > virtualenv. That would require to compile binary packages. That > means more time and, more annoying, the system would need development > libraries. > > > I have nothing to say about disk space but, to counteract the > compilation problem I propose to use the wheel binary package format > [2][3]. > > The tradeoff is that we would need to provide those packages so > compiling the packages for every library and every architecture. > > > My test has succeed with pathagar so far. I have written recipes to > create wheel packages [4] and to deploy a web application in a XSCE > using them [5]. I've even created a wheels repository with ARM > packages for psycopg2 and SQLAlchemy [6]. > > > if you have any doubts, concerns, comments, please share them with me, > I'd really appreciate any kind of feedback. > > > Links: > > [1] http://www.python.org/dev/peps/pep-0405/ > > [2] http://wheel.readthedocs.org/en/latest/ > > [3] http://www.python.org/dev/peps/pep-0427/ > > [4] http://migonzalvar.eu/pip-installing-using-wheels.html > > [5] > http://migonzalvar.eu/deploying-a-web-application-into-a-virtualenv-using-wheel-packages.html > > [6] http://xsce.activitycentral.com/wheelhouse/ > > > > -- > Miguel González > Activity Central: http://www.activitycentral.com > _______________________________________________ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel _______________________________________________ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel