Connection refused when trying to connect to local mysql database from docker container - mysql

Question

I have a problem to connect with local mysql database from a docker container. I'm using docker-compose with two services in containers, database is not on container
I have this docker-compose file:
version: '2'
services:
web:
build:
context: ./
dockerfile: web-dev.dockerfile
volumes:
- ./:/var/www
ports:
- "8080:80"
links:
- app
network_mode: "bridge"
dns:
- 10.0.50.6
app:
build:
context: ./
dockerfile: app-dev.dockerfile
volumes:
- ./:/var/www
network_mode: "bridge"
dns:
- 10.0.50.6
the web container is an nginx service with this Dockerfile:
FROM nginx:1.10
ADD ./vhost.dev.conf /etc/nginx/conf.d/default.conf
WORKDIR /var/www
and this configuration file:
server {
listen 80;
index index.php index.html;
root /var/www/formapp/public;
location / {
try_files $uri /index.php?$args;
}
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass app:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
}
the app container is an app service with this Dockerfile:
FROM php:7-fpm
ENV USER=pasquale
RUN apt-get update && apt-get install -y libmcrypt-dev mysql-client \
openssl zip unzip git nano wget libaio-dev iputils-ping
RUN mkdir -p /opt/oracle/instantclient_10_2
# Download files from in oracle folder:
# https://agora.zanichelli.it/downloads/basic-10.2.0.5.0-linux-x64.zip
# https://agora.zanichelli.it/downloads/sdk-10.2.0.5.0-linux-x64.zip
ADD oracle/basic-10.2.0.5.0-linux-x64.zip /opt/oracle/basic-10.2.0.5.0-linux-x64.zip
ADD oracle/sdk-10.2.0.5.0-linux-x64.zip /opt/oracle/sdk-10.2.0.5.0-linux-x64.zip
RUN unzip /opt/oracle/basic-10.2.0.5.0-linux-x64.zip -d /opt/oracle \
&& unzip /opt/oracle/sdk-10.2.0.5.0-linux-x64.zip -d /opt/oracle \
&& ln -s /opt/oracle/instantclient_10_2/libclntsh.so.10.1 /opt/oracle/instantclient_10_2/libclntsh.so \
&& ln -s /opt/oracle/instantclient_10_2/libclntshcore.so.10.1 /opt/oracle/instantclient_10_2/libclntshcore.so \
&& ln -s /opt/oracle/instantclient_10_2/libocci.so.10.1 /opt/oracle/instantclient_10_2/libocci.so
ADD oracle/tns-admin/tnsnames.ora /opt/oracle/instantclient_10_2/network/admin/tnsnames.ora
ENV LD_LIBRARY_PATH /opt/oracle/instantclient_10_2/
RUN docker-php-ext-install pdo_mysql \
&& pecl install mcrypt-1.0.1 \
&& docker-php-ext-enable mcrypt \
&& pecl install mongodb \
&& docker-php-ext-enable mongodb \
&& docker-php-ext-configure pdo_oci --with-pdo-oci=instantclient,/opt/oracle/instantclient_10_2,10.2 \
&& echo 'instantclient,/opt/oracle/instantclient_10_2' | pecl install oci8 \
&& docker-php-ext-install pdo_oci \
&& docker-php-ext-enable oci8
RUN yes | pecl install xdebug \
&& echo "zend_extension=$(find /usr/local/lib/php/extensions/ -name xdebug.so)" > /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_enable=1' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.default_enable=1' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_connect_back=1' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_autostart=1' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_handler="dbgp"' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_port=9000' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_host=0.0.0.0' >> /usr/local/etc/php/conf.d/xdebug.ini \
&& echo 'xdebug.remote_log=/var/www/xdebug.log' >> /usr/local/etc/php/conf.d/xdebug.ini
RUN mkdir -p /home/$USER
RUN groupadd -g 1000 $USER
RUN useradd -u 1000 -g $USER $USER -d /home/$USER
RUN chown $USER:$USER /home/$USER
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
WORKDIR /var/www
USER $USER
launching the containers with docker-compose -f docker-compose.dev.yml up --build -d works fine and docker ps command give me this output:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7202e2862ef5 190todb_web "nginx -g 'daemon of…" 9 hours ago Up About an hour 443/tcp, 0.0.0.0:8080->80/tcp 190todb_web_1_3c628ae1c69b
d45c04d353d5 190todb_app "docker-php-entrypoi…" 9 hours ago Up About an hour 9000/tcp 190todb_app_1_dd2ac7028b87
I install a lumen app in my project folder formapp and then I created a seeder to insert fake data in my database, and from bash, if I run /projectfolder/formapp$ php artisan db:seed the seeder works and I have this output:
Seeding: UsersTableSeeder
Database seeding completed successfully.
Then I created a route to access my users table from the lumen app:
$router->get('users', function () use ($router) {
return User::all();
});
my lumen env file is this:
APP_NAME=Lumen
APP_ENV=local
APP_KEY=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9
APP_DEBUG=true
APP_URL=http://localhost
APP_TIMEZONE=UTC
LOG_CHANNEL=stack
LOG_SLACK_WEBHOOK_URL=
DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=form_db
DB_USERNAME=root
DB_PASSWORD=radiohead
CACHE_DRIVER=file
QUEUE_CONNECTION=sync
JWT_SECRET=JhbGciOiJIUzI1N0eXAiOiJKV1QiLC
but if I try to connect from http://localhost:8080/users I have this lumen error:
SQLSTATE[HY000] [2002] Connection refused (SQL: select * from `users`)
I tried to change the DB_HOST but I cannot solve the problem:
0.0.0.0 (SQLSTATE[HY000] [2002] Connection refused (SQL: select * from `users`));
172.17.0.1 (SQLSTATE[HY000] [1130] Host '172.17.0.2' is not allowed to connect to this MySQL server (SQL: select * from `users`));
172.17.0.1 is my docker0 inet address.
How can I config my project to work?
PS: the lumen app is up and running, is only the db connection that is not working

Answer 1

You cannot use localhost when the database and app are not on the same server.
You need to allow access by something like:
GRANT ALL PRIVILEGES ON *.* TO 'root'#'172.17.0.2' IDENTIFIED BY '<password>';
You can replace 172.17.0.2 by wildcard %.