Flask deploy into Apache on Ubuntu

Environment

• Ubuntu 16.04.3 LTS
• Apache 2.4.18
  • the command of finding apache2 vesion is apache2 -v
• mod_wsgi 4.3.0
• Python 3.5.2

Project Structure

• log: sotre apache log such as error log and access log
• static: sotre static file such as image, css, js
• templates: store html file
• venv: the project's virtual environment
• web.py

from flask import Flask

app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello world!"

• app.wsgi

import sys

sys.path.insert(0, '/your_project_path_in_server/MyApp')

from web import app as application

Deployment Process

1. update apt-get

   $ sudo apt-get update
   

2. install apache2

   $ sudo apt-get install apache2
   

3. install mod_wsgi

   # Python 2 using this command
   $ sudo apt-get install libapache2-mod-wsgi
   # Python 3 using this command
   $ sudo apt-get install libapache2-mod-wsgi-py3
   

4. add a new apache site config
   Apache2 site config path is at /etc/apache2/sites-available, and add a site config in this folder.
   For example, create a myapp.conf using vim command.

   $ sudo vim myapp.conf
   

   And add the following content in the config.

   # define a variable which is your project path
   Define PROJECT_PATH /your_project_path/MyApp
   
   <virtualhost *:80>
       # wsgi settings
       WSGIDaemonProcess myapp python-path=${PROJECT_PATH}:${PROJECT_PATH}/venv/lib/python3.5/site-packages  # venv path
       WSGIProcessGroup myapp
       WSGIScriptAlias / ${PROJECT_PATH}/app.wsgi  # wsgi script path
   
       # map server side static directory to {ip or domain_name}/static 
       Alias /static  ${PROJECT_PATH}/static
   
       # allow all requests to access this project's file
       <Directory ${PROJECT_PATH}/>
           Require all granted
       </Directory>
   
       # set log saved path
       ErrorLog ${PROJECT_PATH}/log/error.log
       CustomLog ${PROJECT_PATH}/log/access.log combined
   </virtualhost>
   

5. enable this site config

   $ sudo a2ensite myapp
   

6. start apache server

   $ sudo service apache2 start
   

7. Now, you should be able to visit your application website.
   If you encounter some problems, you can find the problems in your project error.log file.