docker entrypoint running in loop - docker

Question

I am new to Docker and trying to adapt a setup from Symfony Docker to another app that uses a different Dockerfile.
I use a docker-entrypoint to run database migrations which, of course, require the database to be up.
My Dockerfile calls docker-entrypoint but somehow in enters into a loop, running it - the entrypoint code - repeatedly.
This is the Dockerfile at /docker/php:
FROM php:8.1-apache AS symfony_php
RUN a2enmod rewrite
RUN apt-get update \
&& apt-get install -y libpq-dev libzip-dev git libxml2-dev nano wget --no-install-recommends \
&& docker-php-ext-configure pgsql -with-pgsql=/usr/local/pgsql \
&& docker-php-ext-install pdo pdo_pgsql pgsql zip \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
RUN wget https://getcomposer.org/download/2.3.5/composer.phar \
&& mv composer.phar /usr/bin/composer && chmod +x /usr/bin/composer
COPY docker/php/apache.conf /etc/apache2/sites-enabled/000-default.conf
COPY docker/php/php.ini /usr/local/etc/php/conf.d/app.ini
COPY docker/php/docker-entrypoint.sh /usr/local/bin/docker-entrypoint
RUN chmod +x /usr/local/bin/docker-entrypoint
ENV SYMFONY_PHPUNIT_VERSION=9
COPY . /var/www
WORKDIR /var/www
RUN mkdir -p var/cache var/log
RUN chmod -R 777 ./var/cache && chmod -R 777 ./var/log
RUN composer install --prefer-dist --no-progress --no-interaction
ENTRYPOINT ["docker-entrypoint"]
The entrypoint also at /docker/php
set -e
if grep -q DATABASE_URL= .env; then
echo "Waiting for database to be ready..."
ATTEMPTS_LEFT_TO_REACH_DATABASE=60
until [ $ATTEMPTS_LEFT_TO_REACH_DATABASE -eq 0 ] || DATABASE_ERROR=$(php bin/console dbal:run-sql -q "SELECT 1" 2>&1); do
if [ $? -eq 255 ]; then
# If the Doctrine command exits with 255, an unrecoverable error occurred
ATTEMPTS_LEFT_TO_REACH_DATABASE=0
break
fi
sleep 1
ATTEMPTS_LEFT_TO_REACH_DATABASE=$((ATTEMPTS_LEFT_TO_REACH_DATABASE - 1))
echo "Still waiting for database to be ready... Or maybe the database is not reachable. $ATTEMPTS_LEFT_TO_REACH_DATABASE attempts left."
done
if [ $ATTEMPTS_LEFT_TO_REACH_DATABASE -eq 0 ]; then
echo "The database is not up or not reachable:"
echo "$DATABASE_ERROR"
exit 1
else
echo "The database is now ready and reachable"
fi
if ls -A migrations/*.php >/dev/null 2>&1; then
php bin/console doctrine:migrations:migrate --no-interaction
fi
fi
exec docker-php-entrypoint "$#"
The resulting loop:

Answer 1

Adding this to my entrypoint solved the issue:
/usr/sbin/apache2ctl -D FOREGROUND
It seems that the entrypoint interrupts the server process and placing the above snippet forces the server back up.
EDIT:
Even better:
Change Dockerfile as below:
ENTRYPOINT ["docker-entrypoint"]
CMD ["apachectl", "-D", "FOREGROUND"]
And on entrypoint.sh keep as per the original post:
exec docker-php-entrypoint "$#"