Tam Huynh tamhv

Django Migrations without Downtime

The following instructions describe a set of processes allowing you to run Django database migrations against a production database without having to bring the web service down.

Note that in the below instructions, migrations are all run manually at explicit points, and are not an automatic part of the deployment process.

Adding Fields or Tables

Adding a (nullable) field or a new table

Make the model or column addition in your code.

	# delete all state alter log out
	const appReducer = combineReducers({
	todos,
	visibilityFilter
	});

	const rootReducer = ( state, action ) => {
	if ( action.type === LOG_OUT ) {
	state = undefined;
	}

	# celery==4.1.0
	# django==1.11.x
	# execute task synchronous
	CELERY_TASK_ALWAYS_EAGER = True
	# raise exception in task
	CELERY_TASK_EAGER_PROPAGATES = True

	sudo firewall-cmd --add-service=https --permanent
	sudo firewall-cmd --reload