3 files changed, 65 insertions(+), 14 deletions(-)

A 06_project/Dockerfile
M 06_project/docker-compose.yml
M 06_project/index.js

@@ 0,0 1,17 @@
+FROM node:10
+
+RUN mkdir /src
+WORKDIR /src
+
+COPY package.json package-lock.json /src/
+RUN mkdir lib/ \
+    && npm install --silent --production
+
+COPY index.js /src/
+COPY lib /src/lib/
+
+ENV NODE_ENV development
+
+EXPOSE 3000
+
+CMD ["npm", "start"]

@@ 1,6 1,16 @@
-version: '3.1'
+version: '3'
 
 services:
+  todos:
+    build: .
+    ports:
+      - "3000:3000"
+    environment:
+      - DATABASE_HOST=mongo
+    depends_on:
+      - mongo
+    networks:
+      - api
 
   mongo:
     image: mongo


@@ 11,3 21,8 @@ services:
       MONGO_INITDB_ROOT_USERNAME: root
       MONGO_INITDB_ROOT_PASSWORD: example
       MONGO_INITDB_DATABASE: tododb
+    networks:
+      - api
+
+networks:
+  api:

@@ 2,28 2,47 @@ const MongoClient = require("mongodb").MongoClient;
 
 const {
   MONGO_INITDB_ROOT_PASSWORD = "example",
-  MONGO_INITDB_ROOT_USERNAME = "root"
+  MONGO_INITDB_ROOT_USERNAME = "root",
+  DATABASE_HOST = "localhost",
+  DATABASE_PORT = 27017
 } = process.env;
 
 const index = require("./lib/app");
 
 const log = require("./lib/logger")();
 
-const url = `mongodb://${MONGO_INITDB_ROOT_USERNAME}:${MONGO_INITDB_ROOT_PASSWORD}@localhost:27017`;
+const url = `mongodb://${MONGO_INITDB_ROOT_USERNAME}:${MONGO_INITDB_ROOT_PASSWORD}@${DATABASE_HOST}:${DATABASE_PORT}`;
 
 const { MONGO_INITDB_DATABASE = "tododb", TODO_PORT = 3000 } = process.env;
 
-MongoClient.connect(
-  url,
-  function(err, client) {
-    if (err) {
-      log.error({ err }, "Error while connecting to DB");
+const connect = () => {
+  MongoClient.connect(
+    url,
+    function(err, client) {
+      if (err) {
+        log.error({ err }, "Error while connecting to DB");
+      } else if (!client) {
+        log.error("Failed to get client, retrying...");
+      } else {
+        clearInterval(interval);
+        clearTimeout(timeout);
+
+        const db = client.db(MONGO_INITDB_DATABASE);
+
+        index(db).listen(TODO_PORT, () => {
+          log.info(`Example index listening on port ${TODO_PORT}!`);
+        });
+      }
     }
+  );
+};
 
-    const db = client.db(MONGO_INITDB_DATABASE);
+const interval = setInterval(connect, 1000);
 
-    index(db).listen(TODO_PORT, () => {
-      log.info(`Example index listening on port ${TODO_PORT}!`);
-    });
-  }
-);
+const timeout = setTimeout(() => {
+  clearInterval(interval);
+
+  log.error("Failed to connect to database!");
+
+  process.exit(1);
+}, 5000);