NoiseMapper Server

What's this?

This repository contains the server application for my master's thesis project at UiO.
The final text can be found here.
There is also a companion Android application, available here.

What can Noisemapper Server do?

It is a Django application, that

1. Offers an API to upload measurements taken by the Android app, and
2. Serves a simple website where the uploaded data can be browsed (on a heatmap).

How to set up?

(at least how I did it)

1. You need a VM with a fix IP and preferably a DNS entry

2. SSL is also highly recommended

3. Install the following packages:

   sudo apt install nginx
   sudo apt install python3 python3-dev
   sudo apt install python3-pip
   sudo pip3 install --upgrade pip
   sudo pip3 install virtualenvwrapper

4. Clone this repository to ~/deployed/noisemapper-server

5. Create a new virtualenv

   mkvirtualenv noisemapper-server \
       -a ~/deployed/noisemapper-server \
       -r ~/deployed/noisemapper-server/requirements.txt

6. Create a file at ~/deployed/env/noisemapper-server.env with the following contents

   GOOGLE_MAPS_API_KEY=#<Use your own!>
   
   DJANGO_SECRET=#<Generate your own!>
   DJANGO_ALLOWED_HOSTS=#<Your registered domain name, e.g. mysite.com>
   
   API_SECRET=#<Generate your own, needed by noisemapper-app too!>
   SNIPPET_STORAGE_DIR=~/snippet_storage
   # 75 MB, keep in sync with nginx
   MAX_POST_PAYLOAD=78643200
   
   # Shouldn't be true in production!!! 
   #DEBUG=true

7. Create a new systemd unit, like this:

   [Unit]
   Description=uWSGI instance to serve the NoiseMapper server
   
   [Service]
   Environment="VENV_PATH=/home/ubuntu/.virtualenvs/noisemapper-server"
   Environment="WORK_DIR=/home/ubuntu/deployed/noisemapper-server"
   EnvironmentFile="home/ubuntu/deployed/env/noisemapper-server.env"
   
   ExecStart=/bin/bash -c "cd ${WORK_DIR}; source ${VENV_PATH}/bin/activate; uwsgi --ini uwsgi.ini"
   
   [Install]
   WantedBy=multi-user.target

   Then make systemd pick it up by running

   sudo systemctl daemon-reload

8. Use the following script (save it to an executable file) to start and then later redeploy newer versions

   #!/usr/bin/env bash
   
   VENV_DIR=/home/ubuntu/.virtualenvs/noisemapper-server
   read -r PROJECT_DIR < $VENV_DIR/.project
   
   source $VENV_DIR/bin/activate \
       && cd $PROJECT_DIR \
       && git pull \
       && python manage.py migrate \
       && python manage.py collectstatic --no-input \
       && sudo systemctl restart noisemapper-server.service \
       && echo "Done!"

9. Create an nginx config file at /etc/nginx/sites-available/<YOUR_HOSTNAME>.conf, with contents:

   # <YOUR_HOSTNAME>.conf
   
   # the upstream component nginx needs to connect to
   upstream django {
       # server unix:///path/to/your/mysite/mysite.sock; # for a file socket
       server 127.0.0.1:8000; # for a web port socket (we'll use this first)
   
   log_format access_log_format '{'
                                    '"status": "$status",'
   				 '"path": "$request",'
   				 '"remote": "$remote_addr",'
   				 '"bytes": "$body_bytes_sent",'
   				 '"userAgent": "$http_user_agent"'
   			      '}';
   
   # Redirect HTTP to HTTPS
   server {
       server_name    <YOUR_HOSTNAME>;
       listen         80;
       return 	   301 https://$host$request_uri;
   }
   
   
   # configuration of the server
   server {
       # the port your site will be served on
       listen      443 ssl;
       # the domain name it will serve for
       server_name <YOUR_HOSTNAME>; # substitute your machine's IP address or FQDN
       
       ssl_certificate	ssl/ca-bundle.crt;
       ssl_certificate_key ssl/<YOUR_HOSTNAME>.key;
       ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
       ssl_ciphers         HIGH:!aNULL:!MD5;
   
       charset     utf-8;
   
       # Logging
       access_log syslog:server=unix:/dev/log,tag=nginx,severity=info access_log_format;
   
       # max upload size, Keep in sync with django!
       client_max_body_size 75M;   # adjust to taste
   
       # Django media
       location /media  {
           alias /home/ubuntu/deployed/noisemapper-server/media;  # your Django project's media files - amend as required
       }
   
       location /static {
           alias /home/ubuntu/deployed/noisemapper-server/static; # your Django project's static files - amend as required
       }
   
       # Finally, send all non-media requests to the Django server.
       location / {
           uwsgi_pass  django;
           include     uwsgi_params; # the uwsgi_params file you installed
       }
   }
   
   

   Then reload nginx:

   sudo nginx -t && sudo nginx -s reload