DurianPy[3] IaaS and Paravirtualization | Application Deployment with DigitalOcean http://bit.ly/1VYN87j

01_durianpy_meetup_3.sh

# Adding a User and Assign a System Level Privileges
sudo adduser ubuntu
sudo adduser ubuntu sudo
sudo nano /etc/sudoers
# or
sudo /usr/sbin/visudo

# Then change the following
# %sudo ALL=(ALL:ALL) NOPASSWD: ALL

02_auto_loggin_user.sh

# Auto Loggin with Self Signed Certificates
# Client Side 
# Generate Private and Public Key
ssh-keygen -t dsa
pbcopy < ~/.ssh/id_dsa.pub

# Server Side
# Add the Public Key to ~/.ssh/authorized_keys
mkdir ~/.ssh
cd ~/.ssh
nano authorized_keys

03_server_update_upgrade.sh

# Install OS Dependencies (Packages, Libraries, Compilers)
sudo apt-get update
sudo apt-get dist-upgrade
# Then Reboot before invoking this command
sudo apt-get install linux-headers-$(uname -r) make build-essential git

# Building/Compiling Python Source Dependencies
sudo apt-get install libssl-dev zlib1g-dev libbz2-dev libreadline-dev sqlite3 libsqlite3-dev python-dev

# Psycopg Package Building/Compiling with PostgreSQL Dependencies
sudo nano /etc/apt/source.list
# Then add this a the bottom of file
deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main
# Add the Repository Certificate
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -; sudo apt-get update
# Install the Postgres Server, Client, and Development Libraries
sudo apt-get install  postgresql-9.3 postgresql-client-9.3 postgresql-server-dev-9.3

# Nginx Building/Compiling Dependencies
sudo apt-get install build-essential libpcre3-dev libssl-dev
Create an Isolated Python Environment (Project, Platform)

04_pyenv_clone_plugin.sh

# Clone Python Environment
git clone git://github.com/yyuu/pyenv.git ~/.pyenv
cd ~/.pyenv/plugins
git clone https://github.com/andersoncardoso/pyenv-autoenv.git
git clone https://github.com/yyuu/pyenv-virtualenvwrapper.git

05_bash_aliases.sh

# Bash Profile
if [[ -d $HOME/.pyenv ]];then
    export PYENV_ROOT="$HOME/.pyenv"
    export PATH="$PYENV_ROOT/bin:$PATH"
    if which pyenv > /dev/null; then eval "$(pyenv init -)"; fi
    source $PYENV_ROOT/plugins/pyenv-autoenv/bin/pyenv-autoenv
    pyenv virtualenvwrapper
fi

#Virtual Environment
export WORKON_HOME=/home/ubuntu/.virtualenvs

#Pip Downnlaod Cache
export PIP_DOWNLOAD_CACHE=/home/ubuntu/.pip

06_python_version_installation.sh

# Create an Isolated Python Version (Operating System)
# Install and Activate User Level Python Version
pyenv install 2.7.7 --verbose
pyenv local 2.7.7

# Verifiy if Python Version was correctly Installed
python -c 'from distutils.sysconfig import get_python_lib; print(get_python_lib())'
# Output Result
# /home/ubuntu/.pyenv/versions/2.7.7/lib/python2.7/site-packages

07_project_virtualenv_application.sh

# Create an Isolated Python Environment (Project, Platform)
# Make a Virtual Environment for your Application
mkvirtualenv utancart_fl010_py2777

# Verify if Vertual Environment was correctly Installed
python -c 'from distutils.sysconfig import get_python_lib; print(get_python_lib())'
# Output Result
# /home/ubuntu/.virtualenvs/utancart_f010_py277/lib/python2.7/site-packages

# Structure your project
mkdir -p ~/utancart/{cfg,log}
cd ~/utancart
git clone https://github.com/ralphleyga/utan-cart.git src

# Install Project Requirements
pip install -r requirements.txt --verbose

# Verify if Project Requirements was correctly Installed
pip freeze
# Output Result
# Flask==0.10
# Flask-SQLAlchemy==1.0
# Jinja2==2.7.3
# MarkupSafe==0.23
# SQLAlchemy==0.9.6
# Werkzeug==0.9.6
# ipython==2.1.0
# itsdangerous==0.24
# psycopg2==2.5.3
# requests==2.3.0
# stripe==1.18.0
# wsgiref==0.1.2

08_postgreslq_create_configure_db.sh

# Configure the Application (Application Server, Database)
# Create a PostgreSQL Database
sudo -u postgres createdb -E UTF8 -e durianpy_utancart_db
# Change Password
sudo -u postgres psql postgres
# Then at postgres=#
\password
# Enter new password: 
# Enter it again: 

# Configure your Application
nano ~/utancart/src/utan.py
# Change
DB_NAME = 'durianpy_utancart_db'
DB_USER = 'postgrespassword'

09_syncdb.py

# nano /home/ubuntu/utancart/syncdb.py

#!/usr/bin/env python
import os
import readline
from pprint import pprint
from flask import *
from utan import *
os.environ['PYTHONINSPECT'] = 'True'
db.create_all()
exit()

#python syncdb.py

10_utancart_app.ini

# mkdir /home/ubuntu/utancart/cfg/vassals/
# nano /home/ubuntu/utancart/cfg/vassals/utancart_app.ini

[uwsgi]
# variables
proj_name = utancart
envs_name = utancart_fl010_py277
proj_dir = /home/ubuntu/%(proj_name)
proj_src = %(proj_dir)/src
envs_dir = /home/ubuntu/.virtualenvs/%(envs_name)

# config
home = %(envs_dir)
pythonpath = %(proj_src)
module = utan:app
socket = 0.0.0.0:3031
processes = 1
threads = 1
harakiri = 60

11_utancart.conf

# nano /home/ubuntu/utancart/cfg/utancart.conf
# sudo /home/ubuntu/utancart/cfg/utancart.conf /etc/init/

description "UtanCart uWSGI Emperor"

start on (filesystem and net-device-up IFACE=lo)
stop on runlevel [!2345]

respawn
env LOGTO=/home/ubuntu/utan/log/uwsgi.log

exec /home/ubuntu/.virtualenvs/utancart_fl010_py277/bin/uwsgi --emperor /home/ubuntu/utancart/cfg/vassals --master --uid ubuntu --gid ubuntu --logto $LOGTO

12_install_configure_nginx.sh

# Connect the Application to Web Server (Web Server)
# Clone, Building/Compiling NGINX from Source
mkdir ~/packages
cd ~/packages
git clone https://github.com/nginx/nginx.git
cd nginx
./configure
make
sudo make install

# Configure NGINX to Support Multiple DNS request (Multiple Application)
sudo mkdir /usr/local/nginx/sites-enabled/
sudo nano /usr/local/nginx/conf/nginx.conf
# Add this inside `http` block
include /usr/local/nginx/sites-enabled/*;

13_utancart_nginx.conf

# /home/ubuntu/utancart/cfg/nginx.conf
# sudo ln -s /home/ubuntu/utancart/cfg/nginx.conf /usr/local/nginx/sites-enabled/utancart

upstream utancart_application {
    server 127.0.0.1:3031;
}

server {
    server_name utancart.domain;

    access_log /home/ubuntu/utancart/log/nginx.access.log;
    error_log /home/ubuntu/utancart/log/nginx.error.log;

    location / { try_files $uri @utancart; }

    location @utancart {
        include uwsgi_params;
        uwsgi_pass utancart_application;
    }
}

14_start_restart_application.sh

sudo initctl start utancart
sudo initctl start nginx
sudo invoke-rc.d postgresql restart