react-express-mysql: get version from mysql

Signed-off-by: Jérémie Drouet <jeremie.drouet@gmail.com>

react-express-mysql/.gitignore

@@ -0,0 +1 @@
+node_modules

react-express-mysql/backend/Dockerfile

@@ -15,7 +15,7 @@ EXPOSE $PORT 9229 9230
 
 COPY package.json /code/package.json
 COPY package-lock.json /code/package-lock.json
-RUN npm ci && npm cache clean --force
+RUN npm ci
 
 # check every 30s to ensure this service returns HTTP 200
 HEALTHCHECK --interval=30s \

react-express-mysql/backend/package.json

@@ -4,20 +4,20 @@
   "version": "2.0.0",
   "description": "Node.js Hello world app using docker features for easy docker-compose local dev and solid production defaults",
   "author": "Bret Fisher <bret@bretfisher.com>",
-  "main": "index.js",
+  "main": "src/index.js",
   "scripts": {
-    "start": "node index.js",
-    "dev-docker": "../node_modules/nodemon/bin/nodemon.js --debug=5858",
-    "dev-host": "nodemon --debug=5858",
-    "start-watch": "nodemon index.js --inspect=0.0.0.0:9229",
-    "start-wait-debuger": "nodemon index.js --inspect-brk=0.0.0.0:9229",
+    "start": "node src/index.js",
+    "start-watch": "nodemon src/index.js --inspect=0.0.0.0:9229",
+    "start-wait-debuger": "nodemon src/index.js --inspect-brk=0.0.0.0:9229",
     "test": "cross-env NODE_ENV=test PORT=8081 mocha --timeout 10000 --exit --inspect=0.0.0.0:9230",
     "test-watch": "nodemon --exec \"npm test\"",
     "test-wait-debuger": "cross-env NODE_ENV=test PORT=8081 mocha --no-timeouts --exit --inspect-brk=0.0.0.0:9230"
   },
   "dependencies": {
     "express": "^4.16.3",
-    "morgan": "^1.8.1"
+    "knex": "^0.20.13",
+    "morgan": "^1.8.1",
+    "mysql2": "^2.1.0"
   },
   "devDependencies": {
     "chai": "^4.1.2",

react-express-mysql/backend/src/config.js

@@ -1,5 +1,18 @@
+const fs = require("fs");
+
+const readFileSync = filename => fs.readFileSync(filename).toString("utf8");
+
 // Constants
 module.exports = {
+  database: {
+    host: process.env.DATABASE_HOST || "localhost",
+    port: process.env.DATABASE_PORT,
+    database: process.env.DATABASE_DB,
+    user: process.env.DATABASE_USER,
+    password: process.env.DATABASE_PASSWORD
+      ? readFileSync(process.env.DATABASE_PASSWORD)
+      : null
+  },
   port: process.env.PORT || 8080
   // if you're not using docker-compose for local development, this will default to 8080
   // to prevent non-root permission problems with 80. Dockerfile is set to make this 80

react-express-mysql/backend/src/database.js

@@ -0,0 +1,7 @@
+const knex = require('knex');
+const { database } = require('./config');
+
+module.exports = knex({
+  client: 'mysql2',
+  connection: database,
+});

react-express-mysql/backend/src/server.js

@@ -12,13 +12,18 @@ const morgan = require("morgan");
 // which is a best practice in Docker. Friends don't let friends code their apps to
 // do app logging to files in containers.
 
+const database = require("./database");
+
 // Appi
 const app = express();
 
 app.use(morgan("common"));
 
-app.get("/", function(req, res) {
-  res.json({ message: "Hello Docker World!" });
+app.get("/", function(req, res, next) {
+  database.raw('select VERSION() version')
+    .then(([rows, columns]) => rows[0])
+    .then((row) => res.json({ message: `Hello from MySQL ${row.version}` }))
+    .catch(next);
 });
 
 app.get("/healthz", function(req, res) {

react-express-mysql/docker-compose.yaml

@@ -5,17 +5,23 @@ services:
       args:
       - NODE_ENV=development
       context: backend
-    command: ../node_modules/.bin/nodemon --inspect=0.0.0.0:9229
+    command: npm run start-watch
     environment:
+      - DATABASE_DB=example
+      - DATABASE_USER=root
+      - DATABASE_PASSWORD=/run/secrets/db-password
+      - DATABASE_HOST=db
       - NODE_ENV=development
     ports:
       - 8080:80
       - 9229:9229
       - 9230:9230
+    secrets:
+      - db-password
     volumes:
-      - ./backend:/opt/app:delegated
-      - ./backend/package.json:/opt/package.json
-      - ./backend/package-lock.json:/opt/package-lock.json
+      - ./backend/src:/code/src:ro
+      - ./backend/package.json:/code/package.json
+      - ./backend/package-lock.json:/code/package-lock.json
       - back-notused:/opt/app/node_modules
     networks:
       - public