dockered mariadb "[1045] Access denied for user" inside docker network - docker

Question

I know that this question has a lot answers on stackoverflow but I didn't found a solution for my case!
I moving the Laravel app to the containers.
I CAN CONNECT TO MARIADB INSTANCE OUTSIDE THE DOCKER NETWORK BUT NOT INSIDE!
(I can connect via MySQL Workbench, locally (via docker exec), I can restore the dump locally from container console and access to DB data outside)
What's wrong?
Why the app is not working (PHP has no access to the mariadb via internal app_network) but in the same time I can get access to DB outside and inside container itself???
OS: CentOS 7.9.2009
Docker: 20.10.12 (e91ed57)
Docker-compose: 1.29.2 (5becea4c)
The same configs works fine on Windows 10.
DOCKER COMPOSE CONFIG:
version: '3.9'
networks:
app_network:
driver: bridge
name: ${NETWORK_NAME}
volumes:
app:
name: ${APP_VOLUME_NAME}
mysql_database:
name: ${MYSQL_DATABASE_VOLUME_NAME}
mysql_dumps:
name: ${MYSQL_DATABASE_DUMPS_VOLUME_NAME}
services:
mariadb:
image: mariadb
env_file:
- ./.env
command: --default-authentication-plugin=mysql_native_password
ports:
- ${MYSQL_EXTERNAL_PORT}:3306
volumes:
- mysql_database:/var/lib/mysql
- mysql_dumps:/var/mysqldump
environment:
MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
MYSQL_USER: ${MYSQL_USER}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
networks:
app_network:
aliases:
- mariadb
profiles:
- dev
- prod
php:
restart: always
env_file:
- ./.env
build:
context: ../../
dockerfile: ./.environment/cs/php/Dockerfile
args:
- USER_ID=${PHP_USER_ID}
- GROUP_ID=${PHP_GROUP_ID}
- DEFAULT_CONFIG_FILE=${PHP_DEFAULT_CONFIG_FILE}
- CUSTOM_CONFIG_FILE=${PHP_CUSTOM_CONFIG_FILE}
- PROJECT_FOLDER=${PHP_PROJECT_FOLDER}
volumes:
- ./php/logs:/var/log
- ../../:${PHP_PROJECT_FOLDER}
networks:
app_network:
aliases:
- php
depends_on:
- memcached
- mariadb
profiles:
- dev
- prod
nginx:
restart: always
env_file:
- ./.env
build:
context: ../../
dockerfile: ./.environment/cs/nginx/Dockerfile
args:
- CONFIG_FILE=${WEB_CONFIG_FILE}
- PROJECT_FOLDER=${WEB_PROJECT_FOLDER}
ports:
- ${WEB_EXTERNAL_PORT}:80
volumes:
- ./nginx/logs:/var/log/nginx
- ../../public:${WEB_PROJECT_FOLDER}:cached
networks:
app_network:
aliases:
- nginx
depends_on:
- php
profiles:
- dev
- prod
Docker .ENV
NETWORK_NAME=CS
APP_VOLUME_NAME=CS_APP_STORAGE
MYSQL_DATABASE_VOLUME_NAME=CS_DATABASE
MYSQL_DATABASE_DUMPS_VOLUME_NAME=CS_DATABASE_DUMPS
MYSQL_EXTERNAL_PORT=3317
MYSQL_ROOT_PASSWORD=root
MYSQL_USER=client
MYSQL_PASSWORD=client
PHP_USER_ID=1000
PHP_GROUP_ID=1000
PHP_DEFAULT_CONFIG_FILE=php.ini-production
PHP_CUSTOM_CONFIG_FILE=./.environment/cs/php/custom.prod.ini
PHP_PROJECT_FOLDER=/var/www/app
WEB_EXTERNAL_PORT=127.0.0.1:8091
WEB_CONFIG_FILE=./.environment/cs/nginx/nginx.dev.conf
WEB_PROJECT_FOLDER=/var/www/app/public
Laravel .ENV
DB_CONNECTION=mysql
DB_HOST=mariadb
DB_PORT=3306
DB_DATABASE=client
DB_USERNAME=client
DB_PASSWORD=client

Answer 1

try to add the expose config key in the maria db service
mariadb:
//...
expose:
- 3306

Answer 2

This is the issue of the MariaDB container. I connected to the MariaDB via MySQL Workbench, fully remove the user, create a new one and give scheme privileges.
After that all works fine.