Add support for PostgreSQL (#94)

Author: Brian Fajardo

README.md

@@ -32,6 +32,7 @@ You can use NoDock for simple projects by using one of the [examples](#Examples)
     - [Change Node version](#Node-Version)
     - [Change Node project location](#Node-Project-Path)
     - [Change MySQL database/user/password](#MySQL-Database-User)
+    - [Change PostgreSQL database/user/password](#PostgreSQL-Database-User)
     - [Change NGINX reverse proxy port](#NGINX-Reverse-Proxy-Port)
     - [Change the timezone](#Change-the-timezone)
     - [Use RabbitMQ plugins](#Use-RabbitMQ-plugins)
@@ -86,6 +87,7 @@ We provide examples of configurations you might use for a specific stack. Each e
 * [Simple Web with Apache](https://github.com/Osedea/nodock/tree/master/_examples/apache) - Node + Apache
 * [Simple Web with Nginx](https://github.com/Osedea/nodock/tree/master/_examples/nginx) - Node + NGINX
 * [MySQL](https://github.com/Osedea/nodock/tree/master/_examples/mysql) - MySQL + Node + NGINX
+* [PostgreSQL](https://github.com/Osedea/nodock/tree/master/_examples/postgresql) - PostgreSQL + 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
 * [Memcached](https://github.com/Osedea/nodock/tree/master/_examples/memcached) - Memcached + Node + NGINX
@@ -290,6 +292,21 @@ You can specify a `PROJECT_PATH` to change the directory in which `npm` will per
                 - MYSQL_USER=default_user
                 - MYSQL_PASSWORD=secret
 ```
+<a name="PostgreSQL-Database-User"></a>
+#### Change the PostgreSQL database/user/password
+```yaml
+# docker-compose.override.yml
+[...]
+    postgresql:
+        build:
+            args:
+                - POSTGRES_DB=default_db
+                - POSTGRES_USER=default_user
+                - POSTGRES_PASSWORD=secret
+```
+
+
+
 <a name="NGINX-Reverse-Proxy-Port"></a>
 #### Change the NGINX reverse proxy port
 Use port `8080` instead of `8000` to bind your Node server

_examples/postgresql/README.md

@@ -0,0 +1,21 @@
+## PostgreSQL
+
+### Setup
+
+Copy the index file in this folder to the project root:
+
+```bash
+cd <project_folder>/
+
+cp -r nodock/_examples/postgresql/* .
+```
+
+### Usage
+
+```bash
+cd nodock/
+
+docker-compose up -d nginx node postgresql
+```
+
+Visit `127.0.0.1` to see if Node successfully connected to PostgreSQL!

_examples/postgresql/index.js

@@ -0,0 +1,21 @@
+const app = require('express')();
+const { Client } = require('pg');
+
+app.get('/', function(request, response) {
+	const client = new Client({
+		user: 'default_user',
+		host: 'postgresql',
+		database: 'default_db',
+		password: 'secret',
+		post: 5432,
+	});
+
+	client.connect(function(err, res) {
+		if (err) {
+			return response.send('Error occurred while trying to connect to PostgreSQL.');
+		}
+		return response.send(`Connected to ${res.host}:${res.port}.`);
+	});
+});
+
+app.listen(8000);

_examples/postgresql/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "postgresql",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.16.2",
+    "pg": "^7.4.1"
+  }
+}

docker-compose.yml

@@ -28,6 +28,18 @@ services:
         expose:
             - "3306"
 
+    postgresql:
+        build:
+            context: ./postgresql
+            args:
+                - POSTGRES_USER=default_user
+                - POSTGRES_PASSWORD=secret
+                - POSTGRES_DB=default_db
+        volumes:
+            - ./data/postgresql/:/var/lib/postgresql
+        expose:
+            - "5432"
+
     mongo:
         build: ./mongo
         expose:

postgresql/Dockerfile

@@ -0,0 +1,11 @@
+FROM postgres:10.2
+
+ARG POSTGRES_USER=default_user
+ARG POSTGRES_PASSWORD=secret
+ARG POSTGRES_DB=default_db
+
+ENV POSTGRES_USER=$POSTGRES_USER
+ENV POSTGRES_PASSWORD=$POSTGRES_PASSWORD
+ENV POSTGRES_DB=$POSTGRES_DB
+
+EXPOSE 5432