Fabric Script to deploy code on django+uwsgi+nginx on aws server

fabric deployment script

from __future__ import with_statement

from fabvenv import virtualenv

from fabric.api import *
from fabric.contrib.console import confirm


# http://stackoverflow.com/questions/1180411/activate-a-virtualenv-via-fabric-as-deploy-user
# http://stackoverflow.com/questions/30964502/python-fabric-nested-roles
server = {
    'prod':{
        'hosts' : ['list of ip address'],
        'db':['list of ip address'],
        },
    'test':{
        'hosts' : ['list of ip address'],
    }
}

# http://docs.fabfile.org/en/1.4.1/usage/execution.html#failure-handling
env.warn_only = True 
env.user = '<server username to login>'
# public key
env.key_filename = 'path to aws public key'
env.src = 'path to code in virtual environment'
bin_dir = 'path to virtual environment. One level above bin folder'
env.project = 'path to virtual environment.'

# # aws login done
# def test():
#     with settings(warn_only=True):
#         result = local('./manage.py test my_app', capture=True)
#     if result.failed and not confirm("Tests failed. Continue anyway?"):
#         abort("Aborting at user request.")

# def commit():
#     local("git add -p && git commit")
# 
# def push():
#     local("git push")


@roles('hosts')
def pull():
    with cd(env.src):
        run('whoami')
        run("git pull")
        

@roles('db')        
def migrate():
    with cd(env.src):
        run('pwd')
        run("python manage.py makemigrations <project name>")
        run("python manage.py migrate")
   
@roles('hosts')
def restart():
    with virtualenv(env.project):
        with cd(env.src):
            run('pwd')
            run('echo $PATH')
            run("uwsgi --reload <path>.pid ") 
            run("supervisorctl restart celeryd")

@roles('hosts')
def restartngix():
    sudo("service nginx restart ")
    
@roles('hosts')
def start(conf):
    # add cleanup part killing all process
    with virtualenv(env.project):
        with cd(env.src):
            run('pwd')
            run("uwsgi --ini uwsgi.ini") 
            run("supervisord -c %s.conf"%conf) 
#             run("supervisorctl start celeryd")
 
@roles('hosts')       
def collectstatic():
    with virtualenv(env.project):
        with cd(env.src):
            run("python manage.py collectstatic")
            
@roles('hosts')
def uname():
    run('uname -a') 

def deploy(conf):
    if not conf:
        raise Exception("conf is empty.")
    execute(uname)
#     execute(pull)
#     execute(collectstatic)
#     execute(migrate)
#     execute(start(conf))
    execute(restart)
#     execute(restartngix)

def test():
    env.roledefs = server['test']
    deploy(conf='supervisor_test')
    
def prod():
    env.roledefs = server['prod']
    deploy(conf="supervisor")


# run as $fab test or $fab prod