docker-compose - PHP instance seems not to communicate with db service [duplicate] - php

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Connect to another container using Docker compose
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Closed last year.
I'm developing a project based on the Github template dunglas/symfony-docker to which I want to add a mysql database..
It seems that my docker-compose.yml file is incorrectly configured because the communication between PHP and mysql is malfunctioning. Indeed when I try to perform a symfony migration, doctrine returns me the following error
An exception occurred in the driver: SQLSTATE[HY000] [2002] No such file or directory
When I inspect the PHP logs I notice that PHP is waiting after the database
php_1 | Still waiting for db to be ready... Or maybe the db is not reachable.
my docker-compose.yml look like :
version: "3.4"
services:
php:
build:
context: .
target: symfony_php
args:
SYMFONY_VERSION: ${SYMFONY_VERSION:-}
SKELETON: ${SKELETON:-symfony/skeleton}
STABILITY: ${STABILITY:-stable}
restart: unless-stopped
volumes:
- php_socket:/var/run/php
healthcheck:
interval: 10s
timeout: 3s
retries: 3
start_period: 30s
environment:
# Run "composer require symfony/orm-pack" to install and configure Doctrine ORM
#DATABASE_URL: postgresql://${POSTGRES_USER:-symfony}:${POSTGRES_PASSWORD:-ChangeMe}#database:5432/${POSTGRES_DB:-app}?serverVersion=${POSTGRES_VERSION:-13}
DATABASE_URL: mysql://wijo:wijo#localhost:3306/wijo"
# Run "composer require symfony/mercure-bundle" to install and configure the Mercure integration
MERCURE_URL: ${CADDY_MERCURE_URL:-http://caddy/.well-known/mercure}
MERCURE_PUBLIC_URL: https://${SERVER_NAME:-localhost}/.well-known/mercure
MERCURE_JWT_SECRET: ${CADDY_MERCURE_JWT_SECRET:-!ChangeMe!}
caddy:
build:
context: .
target: symfony_caddy
depends_on:
- php
environment:
SERVER_NAME: ${SERVER_NAME:-localhost, caddy:80}
MERCURE_PUBLISHER_JWT_KEY: ${CADDY_MERCURE_JWT_SECRET:-!ChangeMe!}
MERCURE_SUBSCRIBER_JWT_KEY: ${CADDY_MERCURE_JWT_SECRET:-!ChangeMe!}
restart: unless-stopped
volumes:
- php_socket:/var/run/php
- caddy_data:/data
- caddy_config:/config
ports:
# HTTP
- target: 80
published: ${HTTP_PORT:-80}
protocol: tcp
# HTTPS
- target: 443
published: ${HTTPS_PORT:-443}
protocol: tcp
# HTTP/3
- target: 443
published: ${HTTP3_PORT:-443}
protocol: udp
# Mercure is installed as a Caddy module, prevent the Flex recipe from installing another service
###> symfony/mercure-bundle ###
###< symfony/mercure-bundle ###
db:
image: mysql
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_ROOT_PASSWORD: 'wijo'
MYSQL_USER: 'wijo'
MYSQL_PASSWORD: 'wijo'
MYSQL_DATABASE: 'wijo'
volumes:
- db-data:/var/lib/mysql
- ./docker/db/data:/var/lib/mysql
adminer:
image: adminer
restart: always
ports:
- 8080:8080
volumes:
php_socket:
caddy_data:
caddy_config:
###> symfony/mercure-bundle ###
###< symfony/mercure-bundle ###
###> doctrine/doctrine-bundle ###
db-data:
###< doctrine/doctrine-bundle ###
dockerFile
# the different stages of this Dockerfile are meant to be built into separate images
# https://docs.docker.com/develop/develop-images/multistage-build/#stop-at-a-specific-build-stage
# https://docs.docker.com/compose/compose-file/#target
# https://docs.docker.com/engine/reference/builder/#understand-how-arg-and-from-interact
ARG PHP_VERSION=8.1
ARG CADDY_VERSION=2
# "php" stage
FROM php:${PHP_VERSION}-fpm-alpine AS symfony_php
# persistent / runtime deps
RUN apk add --no-cache \
acl \
fcgi \
file \
gettext \
git \
gnu-libiconv \
;
# install gnu-libiconv and set LD_PRELOAD env to make iconv work fully on Alpine image.
# see https://github.com/docker-library/php/issues/240#issuecomment-763112749
ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so
ARG APCU_VERSION=5.1.21
RUN set -eux; \
apk add --no-cache --virtual .build-deps \
$PHPIZE_DEPS \
icu-dev \
libzip-dev \
zlib-dev \
; \
\
docker-php-ext-configure zip; \
docker-php-ext-install -j$(nproc) \
intl \
zip \
; \
pecl install \
apcu-${APCU_VERSION} \
; \
pecl clear-cache; \
docker-php-ext-enable \
apcu \
opcache \
; \
\
runDeps="$( \
scanelf --needed --nobanner --format '%n#p' --recursive /usr/local/lib/php/extensions \
| tr ',' '\n' \
| sort -u \
| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
)"; \
apk add --no-cache --virtual .phpexts-rundeps $runDeps; \
\
apk del .build-deps
COPY docker/php/docker-healthcheck.sh /usr/local/bin/docker-healthcheck
RUN chmod +x /usr/local/bin/docker-healthcheck
HEALTHCHECK --interval=10s --timeout=3s --retries=3 CMD ["docker-healthcheck"]
RUN ln -s $PHP_INI_DIR/php.ini-production $PHP_INI_DIR/php.ini
COPY docker/php/conf.d/symfony.prod.ini $PHP_INI_DIR/conf.d/symfony.ini
COPY docker/php/php-fpm.d/zz-docker.conf /usr/local/etc/php-fpm.d/zz-docker.conf
COPY docker/php/docker-entrypoint.sh /usr/local/bin/docker-entrypoint
RUN chmod +x /usr/local/bin/docker-entrypoint
VOLUME /var/run/php
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
# https://getcomposer.org/doc/03-cli.md#composer-allow-superuser
ENV COMPOSER_ALLOW_SUPERUSER=1
ENV PATH="${PATH}:/root/.composer/vendor/bin"
WORKDIR /srv/app
# Allow to choose skeleton
ARG SKELETON="symfony/skeleton"
ENV SKELETON ${SKELETON}
# Allow to use development versions of Symfony
ARG STABILITY="stable"
ENV STABILITY ${STABILITY}
# Allow to select skeleton version
ARG SYMFONY_VERSION=""
ENV SYMFONY_VERSION ${SYMFONY_VERSION}
# Download the Symfony skeleton and leverage Docker cache layers
RUN composer create-project "${SKELETON} ${SYMFONY_VERSION}" . --stability=$STABILITY --prefer-dist --no-dev --no-progress --no-interaction; \
composer clear-cache
###> recipes ###
###> doctrine/doctrine-bundle ###
RUN apk add --no-cache --virtual .pgsql-deps postgresql-dev; \
docker-php-ext-install -j$(nproc) pdo_pgsql; \
apk add --no-cache --virtual .pgsql-rundeps so:libpq.so.5; \
apk del .pgsql-deps
###< doctrine/doctrine-bundle ###
###< recipes ###
COPY . .
RUN set -eux; \
mkdir -p var/cache var/log; \
composer install --prefer-dist --no-dev --no-progress --no-scripts --no-interaction; \
composer dump-autoload --classmap-authoritative --no-dev; \
composer symfony:dump-env prod; \
composer run-script --no-dev post-install-cmd; \
chmod +x bin/console; sync
VOLUME /srv/app/var
ENTRYPOINT ["docker-entrypoint"]
CMD ["php-fpm"]
FROM caddy:${CADDY_VERSION}-builder-alpine AS symfony_caddy_builder
RUN xcaddy build \
--with github.com/dunglas/mercure \
--with github.com/dunglas/mercure/caddy \
--with github.com/dunglas/vulcain \
--with github.com/dunglas/vulcain/caddy
FROM caddy:${CADDY_VERSION} AS symfony_caddy
WORKDIR /srv/app
COPY --from=dunglas/mercure:v0.11 /srv/public /srv/mercure-assets/
COPY --from=symfony_caddy_builder /usr/bin/caddy /usr/bin/caddy
COPY --from=symfony_php /srv/app/public public/
COPY docker/caddy/Caddyfile /etc/caddy/Caddyfile
my database url
DATABASE_URL="mysql://wijo:wijo#localhost:3306/wijo"
Any clues to the issue?

Answer 1

localhost in a container means the container itself. You want to talk to your database container, so you should use it's service name and your database URL should be
DATABASE_URL="mysql://wijo:wijo#db:3306/wijo"