Flask-Maintenance

Adds maintenane mode capability to your Flask app.

Installing:

Install and update using pip:

pip install Flask-Maintenance

Then register this extension.

from flask_maintenance import Maintenance

app = Flask(__name__)
Maintenance(app)

Like other Flask extensions, you can register it lazily:

maintenance_mode = Maintenance()

def create_app():
    app = Flask(__name__)
    maintenance_mode.init_app(app)

Usage

To enable Maintenance mode, run the following command:

$ flask maintenance enable

To disable Maintenance mode:

$ flask maintenance disable

Custom template for Maintenance mode

To show a custom template to user when the maintenance mode is enabled, register a 503 Custom Error Handler.

from flask import render_template

@app.errorhandler(503)
def under_maintenance(e):
    return render_template('503.html'), 503

If you are using application factory pattern:

def under_maintenance(e):
    return render_template('503.html'), 503

def create_app():
    app = Flask(__name__)
    app.register_error_handler(503, under_maintenance)
    return app