entrypoint.sh

#!/bin/sh
set -e

wait_for_mariadb() {
    maxcounter=60  # seconds
    DB_HOST=$(python manage.py shell \
        -c 'from django.conf import settings; print(settings.DATABASES["default"]["HOST"])')
    DB_USER=$(python manage.py shell \
        -c 'from django.conf import settings; print(settings.DATABASES["default"]["USER"])')
    DB_PASSWORD=$(python manage.py shell \
        -c 'from django.conf import settings; print(settings.DATABASES["default"]["PASSWORD"])')

    counter=1
    while ! mysql --protocol TCP -h${DB_HOST} -u${DB_USER} --password="${DB_PASSWORD}" -e "show databases;" > /dev/null 2>&1; do
        sleep 1
        counter=`expr $counter + 1`
        if [ $counter -gt $maxcounter ]; then
            >&2 echo "ERROR: we have unsucesfully waited >$maxcounter seconds for MySQL :-("
            exit 1
        fi;
    done
    echo ".. the database is now ready to accept connections (waited for $counter seconds) :-)\n"
}

if [ "$1" = 'uwsgi' ]; then
    echo "\nI'm waiting for the database to accept connections.."
    wait_for_mariadb
fi

echo "\nGenerating migrations, then migrating my default database"
python manage.py migrate

echo "\nCollect static"
python manage.py collectstatic --noinput

echo "\nStarting the webserver"
exec "$@"