Laravel on Docker: [2002] Connection refused - laravel

Question

I am trying to put a Laravel app up on Docker, but the database container is giving me trouble.
Specifically, I am getting this error when I try to open the app in the browser:
SQLSTATE[HY000] [2002] Connection refused
But, as far as I can see, all the user credentials are correct. Perhaps I am missing something? Please see below.
docker-compose.yml:
version: '3'
services:
app:
build:
context: ./
dockerfile: app.dockerfile
working_dir: /var/www
volumes:
- ./yoga/:/var/www
environment:
- "DB_PORT=33061"
- "DB_HOST=database"
web:
build:
context: ./
dockerfile: web.dockerfile
working_dir: /var/www
volumes:
- ./:/var/www
ports:
- 8080:80
database:
image: mysql:5.7
container_name: database
volumes:
- dbdata:/var/lib/mysql
environment:
- "MYSQL_DATABASE=yogadb"
- "MYSQL_USER=yogi"
- "MYSQL_PASSWORD=mypasshere"
- "MYSQL_ROOT_PASSWORD="
ports:
- "33061:3306"
volumes:
dbdata:
.env:
DB_CONNECTION=mysql
DB_HOST=database
DB_PORT=3306
DB_DATABASE=yogadb
DB_USERNAME=yogi
DB_PASSWORD=mypasshere
When I run the app outside docker, everything works correctly, I just replace DB_HOST=database with DB_HOST=127.0.0.1
What can I do to fix this?
docker ps output is:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2da7283f7a65 docker_app "docker-php-entrypoi…" 19 minutes ago Up 7 seconds 9000/tcp docker_app_1
4801fe3312c1 mysql:5.7 "docker-entrypoint.s…" 2 hours ago Up 7 seconds 33060/tcp, 0.0.0.0:33061->3306/tcp 4801fe3312c1_database
ab370ae1d155 docker_web "nginx -g 'daemon of…" 25 hours ago Up 7 seconds 443/tcp, 0.0.0.0:8080->80/tcp docker_web_1

Answer 1

As #prd mentioned, you need to create bridged network for the containers [1], then add containers to the network [2].
Hostname of container is determined by name of the service in docker-compose.yml. In your case, if app service will connect to database service at hostname database & port 3306.
So docker-compose.yml becomes:
version: '3'
services:
app:
build:
context: ./
dockerfile: app.dockerfile
working_dir: /var/www
volumes:
- ./yoga/:/var/www
environment:
- "DB_PORT=3306" # Port of database container is 3306
- "DB_HOST=database"
networks:
- name_of_network # [2] add container to network
web:
build:
context: ./
dockerfile: web.dockerfile
working_dir: /var/www
volumes:
- ./:/var/www
ports:
- 8080:80
database: # Name of service, which determines hostname of container
image: mysql:5.7
container_name: database
volumes:
- dbdata:/var/lib/mysql
environment:
- "MYSQL_DATABASE=yogadb"
- "MYSQL_USER=yogi"
- "MYSQL_PASSWORD=mypasshere"
- "MYSQL_ROOT_PASSWORD="
ports:
- "33061:3306"
networks:
- name_of_network # [2] add container to network
volumes:
dbdata:
networks:
name_of_network: # [1] create bridged network