Docker - Unauthorized in MariaDB-CodePudding

I want to create a simply LAMP with docker. The code is

Dockerfile

FROM php:8.0.0-apache
ARG DEBIAN_FRONTEND=noninteractive
RUN docker-php-ext-install mysqli
RUN apt-get update \
    && apt-get install -y libzip-dev \
    && apt-get install -y zlib1g-dev \
    && rm -rf /var/lib/apt/lists/* \
    && docker-php-ext-install zip
    
RUN a2enmod rewrite

Docker Compose

version: "3.8"

services:
  www:
    build: .
    container_name: 'www'
    hostname: 'laravelvue.com'
    restart: 'always'
    ports:
      - "80:80"
    networks: 
      - default
    volumes: 
      - ./www:/var/www/html
  database:
    image: mariadb:10.7.1
    container_name: 'mariadb'
    command: --default-authentication-plugin=mysql_native_password
    restart: 'always'
    ports:
      - "3306:3306"
    volumes: 
      - persistent:/var/lib/mysql
    environment:
      MARIADB_DATABASE: laravelvue
      MARIADB_USER: root
      MARIADB_PASSWORD: test
      MARIADB_ROOT_PASSWORD: test
    networks: 
      - default
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: 'phpmyadmin'
    links:
      - database
    environment:
        MYSQL_USER: root
        MYSQL_PASSWORD: test
        MYSQL_ROOT_PASSWORD: test 
    ports:
      - 8000:80
volumes:
  persistent:

When i launch docker compose up -d works, but when i try to enter in database (localhost:8000) with username root and password test returns

mysqli::real_connect(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution

I´m new with docker so i don´t know exactly what´s is wrong ¿Anybody see what´s wrong?

CodePudding user response：

Docker networking works with the name of your service as hostname. So in your database service you can connect with your phpmyadmin via http://phpmyadmin:8000. The same is for the other services. In your phpadmin service you connect with your database via http://database:3306.

And remove the networks: default and links: database in your docker-compose.yml it is not needed, as you use version 3.8 in docker-compose.yml. And make sure your phpadmin service depends_on your database service.

Correct docker-compose.yml:

version: "3.8"

services:
  www:
    build: .
    container_name: 'www'
    restart: 'always'
    ports:
      - "80:80"
    volumes: 
      - ./www:/var/www/html

  database:
    image: mariadb:10.7.1
    container_name: 'mariadb'
    command: --default-authentication-plugin=mysql_native_password
    restart: 'always'
    ports:
      - "3306:3306"
    volumes: 
      - persistent:/var/lib/mysql
    environment:
      MARIADB_DATABASE: laravelvue
      MARIADB_USER: root
      MARIADB_PASSWORD: test
      MARIADB_ROOT_PASSWORD: test

  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: phpmyadmin
    depends_on:
     - database
    environment:
        MYSQL_USER: root
        MYSQL_PASSWORD: test
        MYSQL_ROOT_PASSWORD: test 
    ports:
      - 8000:80