OccupyWallSt

name:	occupywallst
description:	Occupy Wall Street!
Copyright:	© 2011 Justine Tunney
license:	GNU AGPL v3 or later

Installation

This project has been tested on Debian 6, Ubuntu 10.04 LTS and Ubuntu 10.10. If you're not using Ubuntu >= 10.04 or a recent Debian then spare your sanity and set up a virtual machine. Read this if you use PostgreSQL 9.1: http://psycopg.lighthouseapp.com/projects/62710-psycopg/tickets/69

Right now you can ignore most of the chat/real-time related stuff because I couldn't figure out how to make node.js/socket.io not leak a ridiculous amount of memory. When the website was getting only 25,000 visitors a day it would leak about 300 megs of memory an hour. I'm pretty confident this wasn't my fault because most of those requests were being plugged into the 10 lines of code in the notifications section in chat/app.js.

Anyway here's how you get started!

Put this to /etc/hosts:

127.0.2.1 dev.occupywallst.org
127.0.2.2 chat.dev.occupywallst.org

Install dependencies:

sudo ./install_depends.sh

Set up a PostgreSQL database with PostGIS:

sudo -u postgres -i createuser --superuser root   # make root a pg admin
sudo -u postgres -i createuser --superuser $USER  # make you a pg admin
for DB in occupywallst template_postgis; do
    createdb occupywallst
    createlang plpgsql occupywallst
    if [ -f /usr/share/postgresql/*/contrib/postgis-*/postgis.sql ]; then
        psql -d occupywallst -f /usr/share/postgresql/*/contrib/postgis-*/postgis.sql
        psql -d occupywallst -f /usr/share/postgresql/*/contrib/postgis-*/spatial_ref_sys.sql
    else
        psql -d occupywallst -f /usr/share/postgresql/8.4/contrib/postgis.sql
        psql -d occupywallst -f /usr/share/postgresql/8.4/contrib/spatial_ref_sys.sql
    fi
done

Now install the project in its own virtualenv, create the database schema and load some initial content:

cd /opt
sudo virtualenv ows
sudo chown -R $USER ows
cd ows
source bin/activate
git clone git@github.com:$USER/occupywallst.git

sudo python setup.py develop
occupywallst-dev syncdb --noinput
occupywallst-dev loaddata verbiage
occupywallst-dev loaddata example_data
occupywallst-dev runserver 127.0.0.1:9000

Set up nginx. This is optional (but strongly recommended for development) and mandatory for production:

sudo apt-get install nginx
sudo rm /etc/nginx/sites-enabled/default
sudo cp conf/occupywallst.org.conf /etc/nginx/sites-available/
pushd /etc/nginx/sites-enabled/; sudo ln -sf ../sites-available/occupywallst.org.conf; popd
sudo /etc/init.d/nginx restart

Install dependencies for server-side javascript code:

cd chat; npm install -d; cd ..

Optional: Run the chat server in a second terminal:

cd chat
sudo NODE_ENV=development node app.js

Then open this url :) http://dev.occupywallst.org/

There's also a backend for modifying the database and writing articles. Go to http://dev.occupywallst.org/admin/ and log in as user "OccupyWallSt" with the password "anarchy".

If you need to customize Django settings for your local install, do it inside occupywallst/settings_local.py and chat/settings_local.json because git ignores them.

Testing

To run the regression tests:

occupywallst test occupywallst

Production Tips

Deploying OccupyWallSt to a production environment takes a bit more effort. Please consider the following advice.

Create a user named ows:

sudo adduser ows
ssh ows@localhost

Use a virtualenv:

virtualenv env
cd env
source bin/activate
git clone git://github.com/jart/occupywallst.git
cd occupywallst
python setup.py develop
occupywallst help  <-- this actually runs ../bin/occupywallst

Rather than using Django's "runserver" as the backend HTTP server, I recommend using gunicorn:

easy_install gunicorn
gunicorn_django -b 127.0.0.1:9000 --workers=9 --max-requests=1000 --pid=/tmp/gunicorn-occupywallst.pid occupywallst/settings.py

Use AppArmor to harden security:

sudo aa-genprof /home/ows/env/bin/gunicorn_django
sudo aa-complain /home/ows/env/bin/gunicorn_django
# run gunicorn/occupywallst and do a bunch of stuff on the site
sudo aa-logprof
# restart gunicorn/occupywallst and do a bunch of stuff on the site
sudo aa-logprof
sudo nano -w /etc/apparmor.d/home.ows.env.bin.gunicorn_django
sudo aa-enforce /home/ows/env/bin/gunicorn_django

Use pgbouncer to drastically reduce the number of processes PostgreSQL needs to run. Now you have more leeway to performance tune PostgreSQL's settings. These settings are very conservative in Debian by default, even more so than the default PostgreSQL sources.

Query optimizations for forum:

-- optimize: recent comments on forum page
create index occupywallst_comment_published
  on occupywallst_comment (published desc)
  where (is_removed = false and is_deleted = false);

-- optimize: forum thread list
create index occupywallst_article_killed
  on occupywallst_article (killed desc)
  where (is_visible = true and is_deleted = false);

Network Topology

When you run the kitchen sink, there are many network programs all working together and talking to each other. This should hopefully give you a better understanding of the system design in production:

tcp:occupywallst.org:80       nginx redirects browser to https
tcp:occupywallst.org:443      nginx load balancing proxy / media server
tcp:chat.occupywallst.org:80  nginx redirects browser to https
tcp:chat.occupywallst.org:443 chat/app.js: node.js realtime http stuff
tcp:chat.occupywallst.org:843 chat/app.js: flashsocket policy server
udp:127.0.0.1:9010            chat/app.js: notification event subscriber
tcp:127.0.0.1:9000            gunicorn_django backend http server
tcp:127.0.0.1:9040            icecast2 mp3 streaming
tcp:127.0.0.1:8040            freeswitch mod_event_socket
udp:occupywallst.org:5060     freeswitch sip server
tcp:occupywallst.org:5060     freeswitch sip server
tcp:occupywallst.org:5061     freeswitch secure-sip server
tcp:127.0.0.1:11211           memcached
tcp:127.0.0.1:5432            postgresql database server
tcp:127.0.0.1:6432            pgbouncer database connection pooler

Testing

Getting testing to run requires some work, because of the GIS business. Notes on it here:

https://docs.djangoproject.com/en/dev/ref/contrib/gis/install/#spatialdb-template

Do the following:

POSTGIS_SQL_PATH=`pg_config --sharedir`/contrib
createdb -E UTF8 template_postgis
createlang -d template_postgis plpgsql
# Allows non-superusers the ability to create from this template
psql -d postgres -c "UPDATE pg_database SET datistemplate='true' WHERE datname='template_postgis';"
# Loading the PostGIS SQL routines
psql -d template_postgis -f $POSTGIS_SQL_PATH/postgis.sql
psql -d template_postgis -f $POSTGIS_SQL_PATH/spatial_ref_sys.sql
# Enabling users to alter spatial tables.
psql -d template_postgis -c "GRANT ALL ON geometry_columns TO PUBLIC;"
#psql -d template_postgis -c "GRANT ALL ON geography_columns TO PUBLIC;"
psql -d template_postgis -c "GRANT ALL ON spatial_ref_sys TO PUBLIC;"

Then you should be able to run tests as follows (note that this must be run from the project dir):

occupywallst-dev test
occupywallst-dev test occupywallst  # faster