Docker + mysql + php + Symfony, error during connecting to mysql

Question

I'm trying to set up my docker with php app (Symfony 3).

Everything seems to be fine but, Symfony can't connect to mysql.

I have the error:

Uncaught PHP Exception Doctrine\DBAL\Exception\DriverException: "An exception occurred in driver: could not find driver"

My docker-compose.yaml file is:

version: '3'
    services:
      app:
        image: car-rental
        ports: 
          - "8888:80"
        links:
          - php
          - db 
        volumes:
          - ./.code:/var/www/html
        depends_on:
          - db
      php:
        image: php:7.1-fpm
        volumes:
          - ./.code:/var/www/html  
      db:
        image: mysql:5.7
        volumes:
          - mysql-data:/var/lib/mysql
        restart: always
        environment:
          MYSQL_ROOT_PASSWORD: test
          MYSQL_DATABASE: rental

    volumes:
      mysql-data:

if it works pls accept it @bielu000

Adiii
– Adiii

2018-03-28 05:08:10 +00:00
Commented Mar 28, 2018 at 5:08 — Adiii
– Adiii, Commented Mar 28, 2018 at 5:08

Adiii · Accepted Answer · 2018-03-27 11:41:33Z

As mention on the docker hub of php you can see by default it contain only redis redis xdebug is enabled.

Some extensions are not provided with the PHP source, but are instead available through PECL. To install a PECL extension, use pecl install to download and compile it, then use docker-php-ext-enable to enable it.

https://hub.docker.com/_/php/

You can use the same docker compose file just run a command on container boot up

  php:

image: php:7.1-fpm
command:docker-php-ext-install mysqli
volumes:
  - ./.code:/var/www/html

Ater installation you can check

php -m

These are default modules in the latest docker images that you pulled.

    Core
ctype
curl
date
dom
fileinfo
filter
ftp
hash
iconv
json
libxml
mbstring
mysqlnd
openssl
pcre
PDO
pdo_sqlite
Phar
posix
readline
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
zlib

Mike Doe · Accepted Answer · 2018-03-27 10:29:23Z

1

This error (could not find driver) means, that your PHP doesn't have pdo_mysql module loaded. You need to enable it or install first if it's not installed yet.

edited Mar 27, 2018 at 10:29

Mike Doe

17.7k11 gold badges76 silver badges97 bronze badges

answered Mar 27, 2018 at 10:02

Jakub Matczak

15.7k5 gold badges52 silver badges68 bronze badges

1 Comment

bielu000 Over a year ago

It seems you to right, but I'm using already built php7.1-fpm container(as you can see in my docker-compose), so I cant install pdo by myself. Did I should create php7.1 container by my own Dockefile, where I can place instruction to install pdo driver?

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