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fab_new.py
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"""
Server layout:
~/services/
This contains two subfolders
/apache/
/supervisor/
which hold the configurations for these applications
for each environment (staging, demo, etc) running on the server.
Theses folders are included in the global /etc/apache2 and
/etc/supervisor configurations.
~/www/
This folder contains the code, python environment, and logs
for each environment (staging, demo, etc) running on the server.
Each environment has its own subfolder named for its evironment
(i.e. ~/www/staging/logs and ~/www/demo/logs).
"""
import os, sys
from fabric.api import *
from fabric.contrib import files, console
from fabric.contrib.project import rsync_project
from fabric import utils
from fabric.decorators import hosts
import posixpath
PROJECT_ROOT = os.path.dirname(__file__)
RSYNC_EXCLUDE = (
'.DS_Store',
'.git',
'*.pyc',
'*.example',
'*.db',
)
env.home = '/home/rapidsms' #Edit me!
env.project = 'afrims' #Edit me!
env.code_repo = 'git://github.com/narath/afrims-paging.git' #Edit me!
def _setup_path():
# using posixpath to ensure unix style slashes. See bug-ticket: http://code.fabfile.org/attachments/61/posixpath.patch
env.root = posixpath.join(env.home, 'www', env.environment)
env.log_dir = posixpath.join(env.home, 'www', env.environment, 'log')
env.code_root = posixpath.join(env.root, 'code_root')
env.project_root = posixpath.join(env.code_root, env.project)
env.project_media = posixpath.join(env.code_root, 'media')
env.project_static = posixpath.join(env.project_root, 'static')
env.virtualenv_root = posixpath.join(env.root, 'python_env')
env.services = posixpath.join(env.home, 'services')
def setup_dirs():
""" create (if necessary) and make writable uploaded media, log, etc. directories """
sudo('mkdir -p %(log_dir)s' % env, user=env.sudo_user)
sudo('chmod a+w %(log_dir)s' % env, user=env.sudo_user)
# sudo('mkdir -p %(project_media)s' % env, user=env.sudo_user)
# sudo('chmod a+w %(project_media)s' % env, user=env.sudo_user)
# sudo('mkdir -p %(project_static)s' % env, user=env.sudo_user)
sudo('mkdir -p %(services)s/apache' % env, user=env.sudo_user)
sudo('mkdir -p %(services)s/supervisor' % env, user=env.sudo_user)
def staging():
""" use staging environment on remote host"""
env.code_branch = 'develop'
env.sudo_user = 'rapidsms'
env.environment = 'staging'
env.server_port = '9002'
env.server_name = 'rapidsms'
env.hosts = ['192.168.1.204']
env.settings = '%(project)s.settings' % env
env.db = '%s_%s' % (env.project, env.environment)
_setup_path()
def production():
""" use production environment on remote host"""
env.code_branch = 'prod-master'
env.sudo_user = 'user_project'
env.environment = 'production'
env.server_port = '9010'
env.server_name = 'project-production.dimagi.com'
env.hosts = ['10.84.168.98']
env.settings = '%(project)s.localsettings' % env
env.db = '%s_%s' % (env.project, env.environment)
_setup_path()
def install_packages():
"""Install packages, given a list of package names"""
require('environment', provided_by=('staging', 'production'))
packages_file = posixpath.join(PROJECT_ROOT, 'requirements', 'apt-packages.txt')
with open(packages_file) as f:
packages = f.readlines()
sudo("apt-get install -y %s" % " ".join(map(lambda x: x.strip('\n\r'), packages)))
def upgrade_packages():
"""Bring all the installed packages up to date"""
require('environment', provided_by=('staging', 'production'))
sudo("apt-get update -y")
sudo("apt-get upgrade -y")
def setup_server():
"""Set up a server for the first time in preparation for deployments."""
require('environment', provided_by=('staging', 'production'))
upgrade_packages()
# Install required system packages for deployment, plus some extras
# Install pip, and use it to install virtualenv
install_packages()
sudo("easy_install -U pip")
sudo("pip install -U virtualenv")
upgrade_packages()
create_db_user()
create_db()
def create_db_user():
"""Create the Postgres user."""
require('environment', provided_by=('staging', 'production'))
sudo('createuser -D -A -R %(sudo_user)s' % env, user='postgres')
def create_db():
"""Create the Postgres database."""
require('environment', provided_by=('staging', 'production'))
sudo('createdb -O %(sudo_user)s %(db)s' % env, user='postgres')
def bootstrap():
""" initialize remote host environment (virtualenv, deploy, update) """
require('root', provided_by=('staging', 'production'))
sudo('mkdir -p %(root)s' % env, user=env.sudo_user)
clone_repo()
setup_dirs()
create_virtualenv()
update_requirements()
update_services()
def create_virtualenv():
""" setup virtualenv on remote host """
require('virtualenv_root', provided_by=('staging', 'production'))
args = '--clear --distribute --no-site-packages'
sudo('virtualenv %s %s' % (args, env.virtualenv_root), user=env.sudo_user)
def clone_repo():
""" clone a new copy of the git repository """
with cd(env.root):
sudo('git clone %(code_repo)s %(code_root)s' % env, user=env.sudo_user)
def deploy():
""" deploy code to remote host by checking out the latest via git """
require('root', provided_by=('staging', 'production'))
sudo('echo ping!') #hack/workaround for delayed console response
if env.environment == 'production':
if not console.confirm('Are you sure you want to deploy production?',
default=False):
utils.abort('Production deployment aborted.')
with settings(warn_only=True):
stop()
try:
with cd(env.code_root):
sudo('git checkout %(code_branch)s' % env, user=env.sudo_user)
sudo('git pull', user=env.sudo_user)
sudo('git submodule init', user=env.sudo_user)
sudo('git submodule update', user=env.sudo_user)
update_requirements()
update_services()
migrate()
collectstatic()
touch()
finally:
# hopefully bring the server back to life if anything goes wrong
start()
def update_requirements():
""" update external dependencies on remote host """
require('code_root', provided_by=('staging', 'production'))
requirements = posixpath.join(env.code_root, 'requirements')
with cd(requirements):
cmd = ['pip install']
cmd += ['-q -E %(virtualenv_root)s' % env]
cmd += ['--requirement %s' % posixpath.join(requirements, 'apps.txt')]
sudo(' '.join(cmd), user=env.sudo_user)
def touch():
""" touch apache and supervisor conf files to trigger reload. Also calls supervisorctl update to load latest supervisor.conf """
require('code_root', provided_by=('staging', 'production'))
apache_path = posixpath.join(posixpath.join(env.services, 'apache'), 'apache.conf')
supervisor_path = posixpath.join(posixpath.join(env.services, 'supervisor'), 'supervisor.conf')
sudo('touch %s' % apache_path, user=env.sudo_user)
sudo('touch %s' % supervisor_path, user=env.sudo_user)
_supervisor_command('update')
def update_services():
""" upload changes to services such as nginx """
with settings(warn_only=True):
stop()
upload_supervisor_conf()
upload_apache_conf()
netstat_plnt()
def configtest():
""" test Apache configuration """
require('root', provided_by=('staging', 'production'))
run('apache2ctl configtest')
def apache_reload():
""" reload Apache on remote host """
require('root', provided_by=('staging', 'production'))
run('sudo /etc/init.d/apache2 reload')
def apache_restart():
""" restart Apache on remote host """
require('root', provided_by=('staging', 'production'))
run('sudo /etc/init.d/apache2 restart')
def netstat_plnt():
""" run netstat -plnt on a remote host """
require('hosts', provided_by=('production', 'staging'))
run('sudo netstat -plnt')
def stop():
""" stop server and celery on remote host """
require('environment', provided_by=('staging', 'demo', 'production'))
_supervisor_command('stop %(project)s-%(environment)s:*' % env)
def start():
""" start server and celery on remote host """
require('environment', provided_by=('staging', 'demo', 'production'))
_supervisor_command('start %(project)s-%(environment)s:*' % env)
def servers_start():
''' Start the gunicorn servers '''
require('environment', provided_by=('staging', 'demo', 'production'))
_supervisor_command('start %(project)s-%(environment)s:%(project)s-%(environment)s-server' % env)
def servers_stop():
''' Stop the gunicorn servers '''
require('environment', provided_by=('staging', 'demo', 'production'))
_supervisor_command('stop %(project)s-%(environment)s:%(project)s-%(environment)s-server' % env)
def servers_restart():
''' Start the gunicorn servers '''
require('environment', provided_by=('staging', 'demo', 'production'))
_supervisor_command('restart %(project)s-%(environment)s:%(project)s-%(environment)s-server' % env)
def migrate():
""" run south migration on remote environment """
require('project_root', provided_by=('production', 'demo', 'staging'))
with cd(env.project_root):
run('%(virtualenv_root)s/bin/python manage.py syncdb --noinput --settings=%(settings)s' % env)
run('%(virtualenv_root)s/bin/python manage.py migrate --noinput --settings=%(settings)s' % env)
def collectstatic():
""" run collectstatic on remote environment """
require('project_root', provided_by=('production', 'demo', 'staging'))
with cd(env.project_root):
sudo('%(virtualenv_root)s/bin/python manage.py collectstatic --noinput --settings=%(settings)s' % env, user=env.sudo_user)
def reset_local_db():
""" Reset local database from remote host """
raise NotImplementedError
# Here is some example code for Doing a local_db reset. Use at your own risk.
# require('code_root', provided_by=('production', 'staging'))
# if env.environment == 'production':
# utils.abort('Local DB reset is for staging environment only')
# question = 'Are you sure you want to reset your local ' \
# 'database with the %(environment)s database?' % env
# sys.path.append('.')
# if not console.confirm(question, default=False):
# utils.abort('Local database reset aborted.')
# if env.environment == 'staging':
# from afrims.settings_staging import DATABASES as remote
# else:
# from afrims.settings_production import DATABASES as remote
# from afrims.localsettings import DATABASES as loc
# local_db = loc['default']['NAME']
# remote_db = remote['default']['NAME']
# with settings(warn_only=True):
# local('dropdb %s' % local_db)
# local('createdb %s' % local_db)
# host = '%s@%s' % (env.user, env.hosts[0])
# local('ssh -C %s sudo -u aremind pg_dump -Ox %s | psql %s' % (host, remote_db, local_db))
# local('ssh -C %s sudo -u afrims pg_dump -Ox %s | psql %s' % (host, remote_db, local_db))
def upload_supervisor_conf():
"""Upload and link Supervisor configuration from the template."""
require('environment', provided_by=('staging', 'demo', 'production'))
template = posixpath.join(os.path.dirname(__file__), 'services', 'templates', 'supervisor.conf')
destination = '/var/tmp/supervisor.conf'
files.upload_template(template, destination, context=env, use_sudo=True)
enabled = posixpath.join(env.services, u'supervisor/%(environment)s.conf' % env)
run('sudo chown -R %s %s' % (env.sudo_user, destination))
run('sudo chgrp -R www-data %s' % destination)
run('sudo chmod -R g+w %s' % destination)
run('sudo -u %s mv -f %s %s' % (env.sudo_user, destination, enabled))
_supervisor_command('update')
def upload_apache_conf():
"""Upload and link Supervisor configuration from the template."""
require('environment', provided_by=('staging', 'demo', 'production'))
template = posixpath.join(os.path.dirname(__file__), 'services', 'templates', 'apache.conf')
destination = '/var/tmp/apache.conf'
files.upload_template(template, destination, context=env, use_sudo=True)
enabled = posixpath.join(env.services, u'apache/%(environment)s.conf' % env)
run('sudo chown -R %s %s' % (env.sudo_user, destination))
run('sudo chgrp -R www-data %s' % destination)
run('sudo chmod -R g+w %s' % destination)
run('sudo -u %s mv -f %s %s' % (env.sudo_user, destination, enabled))
apache_reload()
def production_servers_stop():
require('environment', provided_by=('production'))
_supervisor_command('stop production-cebu:production-server-cebu')
_supervisor_command('stop production-kpp:production-server-kpp')
def production_servers_start():
require('environment', provided_by=('production'))
_supervisor_command('start production-cebu:production-server-cebu')
_supervisor_command('start production-kpp:production-server-kpp')
def production_servers_restart():
require('environment', provided_by=('production'))
_supervisor_command('restart production-cebu:production-server-cebu')
_supervisor_command('restart production-kpp:production-server-kpp')
def production_routers_stop():
require('environment', provided_by=('production'))
_supervisor_command('stop production-cebu:production-router-cebu')
_supervisor_command('stop production-kpp:production-router-kpp')
def production_routers_start():
require('environment', provided_by=('production'))
_supervisor_command('start production-cebu:production-router-cebu')
_supervisor_command('start production-kpp:production-router-kpp')
def production_routers_restart():
require('environment', provided_by=('production'))
_supervisor_command('restart production-cebu:production-router-cebu')
_supervisor_command('restart production-kpp:production-router-kpp')
def _supervisor_command(command):
require('hosts', provided_by=('staging', 'production'))
run('sudo supervisorctl %s' % command)