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Laravel 8 migration works, but MySQL Refuses Connection – Phpmyadmin

I have a laravel project setup with docker (I currently run it using docker-compose). The project was working fine yesterday but it has stopped functioning partially today.
The most amazing thing is that although migrations and seeders work just fine, I can’t fetch any result from the database! I’ve tried clearing caches and every other guide I could find but they didn’t work at all.
My file contents are:

.env

APP_NAME=bookshelf
APP_ENV=local
APP_KEY=base64:/PqZs+/8YfRYtCth0U5LATD5oOXCN/5pdAs5onk1z7U=
APP_DEBUG=true
APP_URL=http://0.0.0.0:8000

DB_CONNECTION=mysql
DB_HOST=0.0.0.0
DB_PORT=3306
DB_DATABASE=laravel
DB_USERNAME=laravel
DB_PASSWORD=secret

docker-compose.yml

version: "3.7"

services:
  web:
    image: $COMPOSE_PROJECT_NAME
    container_name: $COMPOSE_PROJECT_NAME-laravel
    ports:
      - 8000:8000
    volumes:
      - ./:/app

  mysql:
    image: mysql:8
    container_name: $COMPOSE_PROJECT_NAME-mysql
    ports:
    - '3306:3306'
    environment:
      MYSQL_USER: laravel
      MYSQL_PASSWORD: secret
      MYSQL_DATABASE: laravel
      MYSQL_ROOT_PASSWORD: secret

  phpmyadmin:
    image: phpmyadmin/phpmyadmin:latest
    environment:
      PMA_HOST: 'mysql'
    ports:
    - '127.0.0.1:8080:80'

Dockerfile

FROM php:8.0

RUN apt-get update && apt-get install -y 
    libzip-dev 
    && docker-php-ext-install 
        pdo_mysql 
        zip
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
WORKDIR /app
COPY . /app
RUN composer install

CMD php artisan serve --host=0.0.0.0 --port=8000
EXPOSE 8000

As I said, the following commands work totally ok:

php artisan migrate
php artisan db:seed

But when I want to load a page with the following Controller@method:

public function index()
{
    $records = Book::all();
...

which fetches results from books table, I get the following error in the corresponding page/url/route:

enter image description here

So… I appreciate any help!

Tags:

3

Answers


  1. Chosen as BEST ANSWER
    0

    I solved it. For some reason, my MySQL .env config worked fine yesterday but I had to set the DB_HOST to mysql which is the name of the service, created in docker-compose.yml; so, after changing it:

    docker-compose.yml

    version: "3.7"

services:
  ...

  mysql: # <- I copied this name
    image: mysql:8
    container_name: $COMPOSE_PROJECT_NAME-mysql
    ports:
    - '3306:3306'
    environment:
      MYSQL_USER: laravel
      MYSQL_PASSWORD: secret
      MYSQL_DATABASE: laravel
      MYSQL_ROOT_PASSWORD: secret
  ...

    .env

    DB_CONNECTION=mysql
DB_HOST=mysql # <- pasted it here
DB_PORT=3306
DB_DATABASE=laravel
DB_USERNAME=laravel
DB_PASSWORD=secret

    I got the idea from this answer and as I tried it, it worked!
    I'm gonna leave this Q&A for anyone else who might have such an ambiguous problem.

    EDIT: Strangely enough, after doing so, migrate command has stopped working.
    I am currently oscillating between DB_HOST=0.0.0.0 for migrations and seeding and DB_HOST=mysql for other purposes throughout the application... If anyone got a solution for this, let me know


  2. 0

    In Laravel you have config/database.php where all the setup for the connection is located. You also have a .env file in the root directory in your project (which everyone uses for timesaving). This contains variables that you can use for the entire project.

    On a standard L5 project the MySql section of config/database.php looks like this:

    'mysql' => [
    'driver'    => 'mysql',
    'host'      => env('DB_HOST', 'localhost'),
    'database'  => env('DB_DATABASE', 'forge'),
    'username'  => env('DB_USERNAME', 'forge'),
    'password'  => env('DB_PASSWORD', ''),
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'engine'    => null,
],

    Notice there is no port set!

    Although in my .env file I had set DB_PORT=33060. But that value (3306) was never read into the config/database.php.
    So don’t be a dumbass like myself and forget to check the database.php file.

    FIX
    Simply add ‘port’ => env(‘DB_PORT’, 3306), to your config/database.php and set that value in .env like this DB_PORT=3306

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  3. 0

    If you’re using sail, try this command:

    ./vendor/bin/sail php artisan migrate:refresh --seed

    Works with default Docker & Laravel 9 installation from their official docs: https://laravel.com/docs/9.x#laravel-and-docker

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