Added mysql example

Author: philtrep

README.md

@@ -67,6 +67,7 @@ services:
 We provide examples of configurations you might use for a specific stack. Each example has it's own README file with instructions.
 
 * [Simple Web](https://github.com/Osedea/nodock/tree/master/_examples/simple-web) - Node + NGINX
+* [MySQL](https://github.com/Osedea/nodock/tree/master/_examples/mysql) - MySQL + Node + NGINX
 * [Mongo](https://github.com/Osedea/nodock/tree/master/_examples/mongo) - MongoDB + Node + NGINX
 * [RabbitMQ](https://github.com/Osedea/nodock/tree/master/_examples/rabbitmq) - RabbitMQ + Node + NGINX
 

_examples/mongo/README.md

@@ -7,8 +7,8 @@ Copy the index file in this folder to the project root:
 ```bash
 cd <project_folder>/
 
-cp nodock/_examples/simple-web/index.js .
-cp nodock/_examples/simple-web/package.json .
+cp nodock/_examples/mongo/index.js .
+cp nodock/_examples/mongo/package.json .
 ```
 
 ### Usage

_examples/mysql/README.md

@@ -0,0 +1,22 @@
+## Mysql Service
+
+### Setup
+
+Copy the index file in this folder to the project root:
+
+```bash
+cd <project_folder>/
+
+cp nodock/_examples/mysql/index.js .
+cp nodock/_examples/mysql/package.json .
+```
+
+### Usage
+
+```bash
+cd nodock/
+
+docker-compose up -d mysql node nginx
+```
+
+By going to `127.0.0.1` in your browser you should be seeing a message indicating that `node` has successfully connected to `mysql`.

_examples/mysql/index.js

@@ -0,0 +1,20 @@
+var express = require('express');
+var app = express();
+var mysql = require('mysql');
+
+app.get('/', function(req, res) {
+    var connection = mysql.createConnection({
+      host     : 'mysql',
+      user     : 'default_user',
+      password : 'secret'
+    });
+    connection.connect(function(err) {
+        if (err) {
+            res.send('Could not connect to MySQL ' + err.stack);
+        } else {
+            res.send('Connected to MySQL - Thread ' + connection.threadId);
+        }
+    });
+});
+
+app.listen(8000);

_examples/mysql/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "example-mysql-node-docker",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.14.0",
+    "mysql": "^2.11.1"
+  }
+}

docker-compose.yml

@@ -22,6 +22,7 @@ services:
                 - MYSQL_DATABASE=default_database
                 - MYSQL_USER=default_user
                 - MYSQL_PASSWORD=secret
+                - MYSQL_ROOT_PASSWORD=root
         volumes_from:
             - volumes
         expose:

mysql/Dockerfile

@@ -8,10 +8,13 @@ RUN chown -R mysql:root /var/lib/mysql/
 ARG MYSQL_DATABASE
 ARG MYSQL_USER
 ARG MYSQL_PASSWORD
+ARG MYSQL_ROOT_PASSWORD
 
 ENV MYSQL_DATABASE=$MYSQL_DATABASE
 ENV MYSQL_USER=$MYSQL_USER
 ENV MYSQL_PASSWORD=$MYSQL_PASSWORD
+ENV MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD
+
 
 RUN sed -i 's/MYSQL_DATABASE/'$MYSQL_DATABASE'/g' /etc/mysql/startup && \
     sed -i 's/MYSQL_USER/'$MYSQL_USER'/g' /etc/mysql/startup && \