如何将 laravel 应用程序从 docker 容器内迁移到容器外的 mysql 数据库？

Question

How can I do php artisan migrate from a docker container where the mysql-server is deployed in another container

Here is the Dockerfile of the laravel app

FROM php:7.2.19-fpm
FROM composer
FROM octava/php7.4-mysql5.7
RUN mkdir /usr/src/REST-API/
WORKDIR /usr/src/REST-API
COPY . /usr/src/REST-API
RUN cd /usr/src/REST-API
RUN cat .env
RUN composer install
CMD php artisan serve --host 0.0.0.0

I used mysql/mysql-server:latest for the database container and I ran this command:

sudo docker run --name=mysql3.0 -dp 3309:3306 mysql/mysql-server

my env file is

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3309

An error arise when I do docker exec -it <container-name> php artisan migrate from the container? Illuminate\Database\QueryException

  SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (SQL: select * from information_schema.tables where table_schema = devices and table_name = migrations and table_type = 'BASE TABLE')

Answer 1

You can create a new network in docker and add these 2 containers(php and mysql) to that network so that they can see each other. Basically, you are pointing to DB_HOST in your .env file and it should be accessible to the container running your Laravel app. it could be something like serverIp:dbPort or set as a local ip if they are on the same netowrk.
To create a new network run:

docker network create -d bridge myNetwork

To connect a container to a network run:

docker network connect myNetwork containerName

Refer here for creating networks in Docker also here for connecting containers to networking