The steps are meant to turn a generic Ubuntu box into an Django server hosting the M&E Dashboard with PostgreSQL, Nginx, Gunicorn, Virtualenv and supervisor

A dashboard to monitor, evaluate and report landscape improvements in Cambodia

Update system

sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get clean

Install Admin Tools

sudo apt-get -y install unzip psmisc mlocate telnet lrzsz vim rcconf htop p7zip dos2unix curl
sudo apt-get clean
sudo apt-get -y install gcc
sudo apt-get clean
sudo apt-get -y install build-essential libssl-dev libffi-dev libxml2-dev libxslt1-dev
sudo apt-get clean
sudo apt-get -y install libtiff5-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python-tk
sudo apt-get clean

Git

sudo apt-get -y install git-core
sudo apt-get clean

Install Python 3.6

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.6

Install Python Virtual Environment

sudo apt-get install python3-venv
sudo apt-get install python3-virtualenv

sudo apt-get clean

Now create a virtual env for the web application

cd /home/ubuntu
virtualenv --python=python3.6 dashboard_env

Workon the virtual env we just created

source /home/ubuntu/dashboard_env/bin/activate

Install Python and environment

sudo apt-get -y install python-dev
sudo apt-get clean
sudo apt-get -y install python-pip
sudo apt-get -y install python-pillow
sudo apt-get clean

Download the source code from git

env GIT_SSL_NO_VERIFY=true git clone https://github.com/Servir-Mekong/CambodiaME_Dashboard.git CambodiaME_Dashboard
cd CambodiaME_Dashboard/

Install dependencies from the requirements.txt

pip install -r requirements.txt

Copy the settings.example.py in the cambodiaDashboard and rename it as settings.py

Make changes in the settings

1. Enter your EE_ACCOUNT
2. ALLOWED_URL
3. Make a folder named credentials in the project path and copy client_secret.json and privatekey.json
4. Define GEE asset ID

Verify the server is running by

python manage.py runserver 0.0.0.0:8000
# To end Ctrl + C

Now migrate the database

python manage.py migrate

Install application server

pip install gunicorn

Check if gunicorn is running well by

gunicorn cambodiaDashboard.wsgi:application --bind 0.0.0.0:8001

Now make sh (or bash) script called outside from project to automate with gunicorn

cd ..
nano gunicorn_cambodiaDashboard.sh

Edit according to your environment

#!/bin/bash

NAME="cambodiaDashboard"                                   # Name of the application
DJANGODIR=/home/ubuntu/CambodiaME_Dashboard             # Django project directory
SOCKFILE=/home/ubuntu/dashboard_env/run/gunicorn.sock # we will communicte using this unix socket
USER=ubuntu                                           # the user to run as
GROUP=ubuntu                                          # the group to run as
NUM_WORKERS=4                                         # how many worker processes should Gunicorn spawn;                                               # usually is NUM_OF_CPU * 2 + 1
DJANGO_SETTINGS_MODULE=cambodiaDashboard.settings          # which settings file should Django use
DJANGO_WSGI_MODULE=cambodiaDashboard.wsgi                  # WSGI module name
TIMEOUT=6000
echo "Starting $NAME as `whoami`"

# Activate the virtual environment

cd $DJANGODIR
source /home/ubuntu/dashboard_env/bin/activate
export DJANGO_SETTINGS_MODULE=$DJANGO_SETTINGS_MODULE
export PYTHONPATH=$DJANGODIR:$PYTHONPATH

# Create the run directory if it doesn't exist

RUNDIR=$(dirname $SOCKFILE)
test -d $RUNDIR || mkdir -p $RUNDIR

# Start your Django Unicorn
# Programs meant to be run under supervisor should not daemonize themselves (do not use --daemon)

exec gunicorn ${DJANGO_WSGI_MODULE}:application \
  --name $NAME \
  --workers $NUM_WORKERS \
  --user=$USER --group=$GROUP \
  --timeout $TIMEOUT \
  --bind=unix:$SOCKFILE \
  --log-level=debug \
  --log-file=-

Now make this script executable

sudo chmod u+x gunicorn_cambodiaDashboard.sh

Now install supervisor

sudo apt-get -y install supervisor

Now create a supervisor conf file for the project

sudo nano /etc/supervisor/conf.d/cambodiaDashboard.conf

And add the following bash script

[program:cambodiaDashboard]
command = /home/ubuntu/gunicorn_cambodiaDashboard.sh ; Command to start app
user = ubuntu                                         ; User to run as
stdout_logfile = /home/ubuntu/logs/cambodiaDashboard_supervisor.log ; Where to $
redirect_stderr = true                                ; Save stderr in the same$
environment=LANG=en_US.UTF-8,LC_ALL=en_US.UTF-8       ; Set UTF-8 as default en$

Now create the required files and folder

mkdir -p /home/ubuntu/logs/
touch /home/ubuntu/logs/cambodiaDashboard_supervisor.log

Make supervisor reread configuration files

Check your Ubuntu version

lsb_release -a

For ubuntu 14.04

sudo supervisorctl reread
sudo supervisorctl update
sudo supervisorctl start cambodiaDashboard

For ubuntu 16.04

sudo systemctl restart supervisor
sudo systemctl enable supervisor

Check status of supervisor

sudo supervisorctl status cambodiaDashboard

Install nginx

sudo apt-get -y install nginx

Make a conf file for nginx

sudo nano /etc/nginx/sites-available/cambodiaDashboard.conf

Then add the following script to the conf file

upstream cambodiadashboard_server {
  # fail_timeout=0 means we always retry an upstream even if it failed
  # to return a good HTTP response (in case the Unicorn master nukes a
  # single worker for timing out).
  server unix:/home/ubuntu/dashboard_env/run/gunicorn.sock fail_timeout=0;
}

server {
    server_name me-dashboard-servir.adpc.net;

    client_max_body_size 4G;

    keepalive_timeout 0;
    sendfile on;

    access_log /home/ubuntu/logs/nginx-access.log;
    error_log /home/ubuntu/logs/nginx-error.log;

    location /static/ {
        alias   /home/ubuntu/CambodiaME_Dashboard/static/;
    }

    location / {

        # an HTTP header important enough to have its own Wikipedia entry:
        #   http://en.wikipedia.org/wiki/X-Forwarded-For
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;


        # enable this if and only if you use HTTPS, this helps Rack
        # set the proper protocol for doing redirects:
        # proxy_set_header X-Forwarded-Proto https;

        # pass the Host: header from the client right along so redirects
        # can be set properly within the Rack application
        proxy_set_header Host $http_host;

        proxy_read_timeout 60000;
        proxy_connect_timeout 60000;
        proxy_send_timeout 60000;
        send_timeout 60000;

        # we don't want nginx trying to do something clever with
        # redirects, we set the Host: header above already.
        proxy_redirect off;

        # set "proxy_buffering off" *only* for Rainbows! when doing
        # Comet/long-poll stuff.  It's also safe to set if you're
        # using only serving fast clients with Unicorn + nginx.
        # Otherwise you _want_ nginx to buffer responses to slow
        # clients, really.
        # proxy_buffering off;

        # Try to serve static files from nginx, no point in making an
        # *application* server like Unicorn/Rainbows! serve static files.
        if (!-f $request_filename) {
            proxy_pass http://cambodiadashboard_server;
            break;
          }
  }

  # Error pages
  error_page 500 502 503 504 /500.html;
  location = /500.html {
      root /home/ubuntu/CambodiaME_Dashboard/static/;
  }
}

Make a soft link to the nginx conf

sudo ln -s /etc/nginx/sites-available/cambodiaDashboard.conf /etc/nginx/sites-enabled/cambodiaDashboard.conf

You can delete the default soft link in the sites-enabled as

sudo rm /etc/nginx/sites-enabled/default

start the nginx service

sudo service nginx start

Sometimes ngnix might not work, so consider restarting the service as well

sudo service nginx restart

see the status of the nginx service

sudo service nginx status

NB: make sure the application, script and services have necessary permission to run

You can change permissions as

sudo chown -R -v your-user /your-folder