[PYTHON] [Note] Run Django on Amazon Linux 2

Keep your OS up to date

$ sudo yum update -y

Put python

Put what you need in python

$ sudo yum install git gcc zlib-devel libffi-devel bzip2-devel readline-devel openssl-devel sqlite-devel

Put pyenv

$ git clone https://github.com/yyuu/pyenv.git ~/.pyenv

Pass through

$ echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
$ echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
$ echo -e 'if command -v pyenv 1>/dev/null 2>&1; then\n  eval "$(pyenv init -)"\nfi' >> ~/.bash_profile
$ exec "$SHELL" -l

Find out the latest version of python that you can put in pyenv

$ pyenv install --list

Put the latest version of python

$ pyenv install 3.8.1

Use the installed python by default

$ python -V
Python 2.7.16
$ pyenv versions
* system (set by /home/ec2-user/.pyenv/version)
  3.8.1
$ pyenv global 3.8.1
$ pyenv versions
  system
* 3.8.1 (set by /home/ec2-user/.pyenv/version)
$ pyenv rehash
$ python -V
Python 3.8.1

Put in Django

Since pip is also included in the package put in pyenv, upgrade the pip itself and then install Django

$ pip install --upgrade pip
$ pip install Django Pillow

Create a directory and create a Django project in it

$ cd /var/www
$ mkdir django
$ django-admin startproject config .

DB

Install MySQL

$ sudo rpm -ivh http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
$ yum install mysql-community-server
$ mysqld --version
mysqld  Ver 5.7.29 for Linux on x86_64 (MySQL Community Server (GPL))

DB connection

Django recommends mysqlclient (https://docs.djangoproject.com/en/3.0/ref/databases/#mysql-db-api-drivers). I don't use PyMySQL as much as possible.

$ sudo yum install mysql-devel
$ pip install mysqlclient

Check connection

$ python manage.py dbshell
#Use production configuration files
$ python manage.py dbshell --settings=config.settings.production

gunicorn

$ pip install gunicorn

Try launching Django with gunicorn

$ gunicorn config.wsgi --bind=[Private IP]
#Use production configuration files
$ gunicorn config.wsgi --bind=[Private IP] --env DJANGO_SETTINGS_MODULE=config.settings.production

nginx

$ sudo amazon-linux-extras install nginx1.12 -y
$ sudo cp -a /etc/nginx/nginx.conf /etc/nginx/nginx.conf.back
$ sudo systemctl start nginx.service
#Automatic start
$ sudo systemctl enable nginx.service
$ systemctl is-enabled nginx.service
enabled

$ sudo vim /etc/nginx/conf.d/django.conf

server {
    listen  80;
    server_name [Public IP, elb and domain];

    location /static {
        alias /var/www/manage/static;
    }

    location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

$ gunicorn config.wsgi --daemon --bind 127.0.0.1:8000
$ gunicorn config.wsgi --daemon --bind 127.0.0.1:8000 --env DJANGO_SETTINGS_MODULE=config.settings.production

If you can confirm, kill the process

$ sudo lsof -i:8000
COMMAND    PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
gunicorn 13502 ec2-user    5u  IPv4  68558      0t0  TCP [Private IP].ap-northeast-1.compute.internal:irdmi (LISTEN)
gunicorn 13504 ec2-user    5u  IPv4  68558      0t0  TCP ip-[Private IP].ap-northeast-1.compute.internal:irdmi (LISTEN)
$ sudo kill -9  13502 13504

systemctl command registration

sudo vim /etc/systemd/system/project.service

[Unit]
Description=gunicorn
After=network.target

[Service]
WorkingDirectory=/var/www/django
ExecStart=/home/ec2-user/.pyenv/shims/gunicorn --bind 127.0.0.1:8000 config.wsgi:application --env DJANGO_SETTINGS_MODULE=config.settings.production

[Install]
WantedBy=multi-user.target

reference

https://narito.ninja/blog/detail/21/