Install Cabot on CentOS7 using uwsgi, nginx, and mysql

## gistfile1.txt
The Cabot quick start instructions are for auto installing on ubuntu using fabric, gunicorn, postgres.
I wanted to install manually on CentOS 7 running with uwsgi, nginx, mysql, and use our own mail server for
alerts instead of Amazon SES
These are my notes on how I did that.
These notes aren't a complete walkthrough, and a few steps may be missing or wrong, but I thought they might
be helpful anyways.

Setup
    1. adduser www
       passwd www
       mkdir /var/www/
       mkdir /var/www/logs/
       mkdir /var/www/run/
       mkdir /var/www/run/celery/
       chown -R www.www /var/www/
    2. download(or clone) Cabot from github: https://github.com/arachnys/cabot/archive/master.zip
    3. unziped to /var/www/cabot/
    4. python setup.py install
       I'm not sure if this was necessary
    5. yum install pip gcc python-devel openssl-devel
    6. pip install setuptools --upgrade
    7. copied list of required packages from setup.py to requirements.txt
       replaced psycopg2 with MySQL-python
    8. pip install -r requirements.txt
    9. If you want to use your own smtp server instead of amazon:
       nano cabot/settings.py
          EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
          EMAIL_HOST = "mail.example.com"
    10. cp conf/production.env.example cp conf/production.env
    11. nano conf/production.env
        DATABASE_URL=mysql://cabot:PASSWORD@db.lan2/Cabot
        ADMIN_EMAIL=admin@example.com
        GRAPHITE_API=http://graphite.lan2/
        GRAPHITE_USER=cabot
        GRAPHITE_PASS=PASSWORD
        WWW_HTTP_HOST=monitor.lan2
    12. Install node:
        yum install gcc-c++
        wget http://nodejs.org/dist/v0.10.33/node-v0.10.33.tar.gz
        ./configure
        make
        make install
        npm install -g coffee-script less@1.3 --registry http://registry.npmjs.org/
    13. sh -ac ' . ./conf/production.env; python manage.py syncdb'
    14. sh -ac ' . ./conf/production.env; python manage.py migrate'
    15. sh -ac ' . ./conf/production.env; python manage.py collectstatic --noinput'
    16. sh -ac ' . ./conf/production.env; python manage.py compress'
    17. Setup uwsgi
        pip install uwsgi
        nano /etc/systemd/system/uwsgi.service
          [Unit]
          Description=uWSGI Emperor
          After=syslog.target

          [Service]
          ExecStart=/bin/uwsgi --ini /etc/uwsgi/emperor.ini
          Restart=always
          KillSignal=SIGQUIT
          Type=notify
          StandardError=syslog
          NotifyAccess=main

          [Install]
          WantedBy=multi-user.target

        nano /etc/uwsgi/vassals/cabot.ini
          [uwsgi]
          chdir=/var/www/cabot
          module=cabot.wsgi
          master=True
          vacuum=True
          max-requests=50000
          socket=localhost:5000
          processes=10
          logto=/var/www/logs/cabot_uwsgi.log

          for-readline = /var/www/cabot/conf/production.env
            env = %(_)
          endfor =

        systemctl start uwsgi
        systemctl enable uwsgi

    18. Setup Nginx
        Install official Nginx rpm from repo: http://wiki.nginx.org/Install

        nano /etc/nginx/conf.d/cabot.conf
           upstream django {
              server 127.0.0.1:5000;
           }
           server {
             listen 10.1.0.74:80;
             server_name monitor.lan2;
             access_log /var/www/logs/cabot.access.log;
             error_log /var/www/logs/cabot.error.log;

              location / {
                uwsgi_pass django;
                include        uwsgi_params;
             }

             location /static/ {
               alias /var/www/cabot/static/;
             }
           }

       systemctl start nginx
       systemctl enable nginx

    19. Setup systemd file to run celery workers
        nano /etc/systemd/system/cabot-worker.service
            # Copied and modified from https://github.com/celery/celery/blob/3.1/extra/systemd/celery.service
            [Unit]
            Description=CabotCelery workers
            After=network.target
            [Service]
            Type=forking
            User=www
            Group=www
            WorkingDirectory=/var/www/cabot/
            EnvironmentFile=/var/www/cabot/conf/production.env
            ExecStart=/bin/celery multi start worker \
            -A cabot --pidfile=/var/www/run/celery/%n.pid \
            --logfile=/var/www/logs/celery_%n.log --loglevel="INFO" \
            -B

            ExecStop=/bin/celery multi stopwait worker \
            --pidfile=/var/run/celery/%n.pid

            ExecReload=/bin/celery multi restart worker \
            -A cabot --pidfile=/var/www/run/celery/%n.pid \
            --logfile=/var/www/logs/celery_%n.log --loglevel="INFO"

            [Install]
            WantedBy=multi-user.target

        systemctl start cabot-worker
        systemctl enable cabot-worker

    20. Install redis
        Install epel: rpm -Uvh http://mirror.symnds.com/distributions/fedora-epel/7/x86_64/e/epel-release-7-2.noarch.rpm
        yum install redis
        systemctl start redis
        systemctl enable redis
    21. goto http://monitor.lan2  and see if everything is successfully running

Run cabot without uwsgi and nginx for testing:
   sh -ac ' . ./conf/production.env; python manage.py runserver'

To run uwsgi server for testing:
   sh -ac ' . ./conf/production.env; uwsgi --socket localhost:5000 --module cabot.wsgi --chmod-socket=664'

Manually run celery workers:
   sh -ac '. ./conf/production.env; celery worker -B -A cabot --loglevel=INFO --concurrency=16 -Ofair'