Simple Fabfile for django based apps deployment

fabfile.py

# -*- encoding: utf8 -*-
from fabric.api import env, settings, cd
from fabric.contrib.files import exists
from fabric.operations import local, sudo, run, put
import os


# Default configurations
env.hosts = ['[email protected]']

env.project_name = "trids"
env.install_to = "/webapps/trids"

env.static_dir = "%s/static" % env.install_to
env.git_repo = "[email protected]:trilhus/trids.git"
env.site_url = "trids.universo42.com.br"
env.site_port = "80"

# Environment params

env.virtualenv_folder = '%s/env/bin' % env.install_to
env.nginx_upstream_resource = "%s_upstream" % env.project_name
env.gunicorn_socket_file = "%(virtualenv_folder)s/sock" % env

env.log_error_file = "%s/env/logs/nginx-error.log" % env.install_to
env.log_acess_file = "%s/env/logs/nginx-access.log" % env.install_to

env.static_dir = "%s/static/" % env.install_to  # MUST have ending slash
env.media_dir = "%s/media/" % env.install_to

env.circusd_file = "/opt/circus/watchers/%(project_name)s.ini" % env
env.nginx_file = "/etc/nginx/sites-enabled/%(project_name)s.conf" % env

## Enviroment specific settings
env.commands = {
    'virtualenv': '/usr/bin/virtualenv',
    'bower': '/opt/nodejs/bin/bower'  # Because of Debian custom Install
}


#
# Tools
#

def run_in_virtualenv(command):
    run('%s/%s' % (env.virtualenv_folder, command))


#
# Custom actions
#
def clone_repo():
    run('git clone %(git_repo)s %(install_to)s' % env)
    with cd(env.install_to):
        run('mkdir static')
        run('mkdir media')


def setup_virtualenv():
    with cd(env.install_to):
        run('%s env' % env.commands['virtualenv'])
        run('mkdir env/logs')  # Criação dos logs


def update_requirements():
    run_in_virtualenv('pip install -r %s/requirements.pip' % env.install_to)
    run_in_virtualenv('pip install gunicorn')


def init_django():
    with cd(env.install_to):
        run_in_virtualenv('python manage.py syncdb')
        run_in_virtualenv('python manage.py migrate --all')
        run_in_virtualenv('python manage.py collectstatic --noinput')


def sync_bower():
    with cd(env.static_dir):
        run('%s install' % env.commands['bower'])


def create_circusd():
    template_file = """[watcher:%(project_name)s]
cmd = env/bin/gunicorn
args = %(project_name)s.wsgi:application --bind unix:%(gunicorn_socket_file)s
working_dir = %(install_to)s
numprocesses = 3""" % env

    f = open('circusd.ini' % env, 'w')
    f.write(template_file)
    f.close()

    put(local_path="circusd.ini", remote_path=env.circusd_file, use_sudo=True)

    os.remove('circusd.ini')


def create_nginx():
    template_file = """upstream %(nginx_upstream_resource)s {
  server unix:%(gunicorn_socket_file)s fail_timeout=0;
}

server {

    listen   %(site_port)s;
    server_name %(site_url)s;

    client_max_body_size 4G;

    access_log %(log_acess_file)s;
    error_log %(log_error_file)s;

    location /static/ {
        alias   %(static_dir)s;
    }

    location /media/ {
        alias   %(media_dir)s;
    }

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;

        proxy_redirect off;

        if (!-f $request_filename) {
            proxy_pass http://%(nginx_upstream_resource)s;
            break;
        }
    }

    error_page 500 502 503 504 /500.html;
    location = /500.html {
        root %(static_dir)s;
    }
}""" % env

    f = open('nginx.conf' % env, 'w')
    f.write(template_file)
    f.close()

    put(local_path="nginx.conf", remote_path=env.nginx_file, use_sudo=True)
    os.remove('nginx.conf')


def restart_services():
    with settings(warn_only=True):
        sudo('/etc/init.d/nginx reload')
        sudo('/opt/circus/bin/circusctl reload')


#
# Main functions
#
def setup():

    clone_repo()
    setup_virtualenv()
    update_requirements()
    init_django()
    sync_bower()

    create_circusd()
    create_nginx()

    restart_services()


def deploy():

    create_circusd()
    create_nginx()

    with cd(env.install_to):
        run('git pull')
        update_requirements()
        run('rm -Rf static/*')
        run_in_virtualenv('python manage.py collectstatic --noinput')
        run_in_virtualenv('python manage.py migrate --all') # south migrate
        sync_bower()
        restart_services()


def uninstall():
    sudo('rm -Rf %(install_to)s' % env)
    sudo('rm -Rf %(circusd_file)s' % env)
    sudo('rm -Rf %(nginx_file)s' % env)
    restart_services()