Unable to run NodeJS microservices through Docker containers

Question

I was getting started with Docker, created couple of tiny Express(NodeJS) services. Plan is to run the microservices inside Docker containers and then establish a inter-communication between them using Docker Compose service names.

Here is the Github repo of this simple project. Am able to build images with below commands :

cd books
docker build -t node-micro/books .
cd auth
docker build -t node-micro/auth .

Commands to start containers :

docker run -d -p 6677:6677 node-micro/auth

docker run -d -p 7766:7766 node-micro/books

But when i hit below URL's there is no response, which was working fine couple of day's before :

http://localhost:6677/

http://localhost:7766/

And have no clue what's happening with docker compose. No luck on accessing same URL's as mentioned above after stoping all containers, delete all images & ran this command :

docker-compose up -d

Need some help on bringing up the containers individually and also through docker-compose.

Answer 1

I can see in each of your micro-service, your application is running on ports 3000 in the container but you are exposing 7766 and 6677 in your docker-compose.yml

Please check the below docker-compose.yml

version: '3'
services:
  books:
    build: './books'
    ports:
      - "7766:3000"
    depends_on: 
      - auth

  auth:
    build: './auth'
    ports:
      - "6677:3005"

and then run the below command

docker-compose up --build 

--build will build the images as well.

Then, you should be able to access the service

http://localhost:6677/

http://localhost:7766/

Output

docker-compose up --build
Creating network "node_microservices_default" with the default driver
Building auth
Step 1/7 : FROM node:10-alpine
 ---> 0aa7bb41deca
Step 2/7 : WORKDIR /usr
 ---> Running in a1dc67b70538
Removing intermediate container a1dc67b70538
 ---> 5fc74fc80a14
Step 3/7 : COPY package*.json ./
 ---> 454f1b7aba87
Step 4/7 : RUN npm install
 ---> Running in a24eea8b79d4
npm WARN [email protected] No description
npm WARN [email protected] No repository field.

added 50 packages from 37 contributors and audited 50 packages in 8.58s
found 0 vulnerabilities

Removing intermediate container a24eea8b79d4
 ---> 31b31ff4516e
Step 5/7 : COPY . .
 ---> 1eeaa8e70300
Step 6/7 : EXPOSE 3000
 ---> Running in fc798167dbcd
Removing intermediate container fc798167dbcd
 ---> 4d964d25c099
Step 7/7 : CMD ["npm", "start"]
 ---> Running in 3c28d92f9ef6
Removing intermediate container 3c28d92f9ef6
 ---> 514f68d11d7c
Successfully built 514f68d11d7c
Successfully tagged node_microservices_auth:latest
Building books
Step 1/7 : FROM node:10-alpine
 ---> 0aa7bb41deca
Step 2/7 : WORKDIR /usr
 ---> Using cache
 ---> 5fc74fc80a14
Step 3/7 : COPY package*.json ./
 ---> 56addb6c75a5
Step 4/7 : RUN npm install
 ---> Running in 4864fb7a171c
npm WARN [email protected] No description
npm WARN [email protected] No repository field.

added 50 packages from 37 contributors and audited 50 packages in 5.111s
found 0 vulnerabilities

Removing intermediate container 4864fb7a171c
 ---> 82bb2cd54357
Step 5/7 : COPY . .
 ---> 12893a93e82e
Step 6/7 : EXPOSE 3000
 ---> Running in 1301e29dbd52
Removing intermediate container 1301e29dbd52
 ---> c26948ebcb3b
Step 7/7 : CMD ["npm", "start"]
 ---> Running in db948866a121
Removing intermediate container db948866a121
 ---> 703b901d7bc4
Successfully built 703b901d7bc4
Successfully tagged node_microservices_books:latest
Creating node_microservices_auth_1 ... done
Creating node_microservices_books_1 ... done
Attaching to node_microservices_auth_1, node_microservices_books_1
auth_1   | 
auth_1   | > [email protected] start /usr
auth_1   | > node index.js
auth_1   | 
auth_1   | Running on port 3005
auth_1   | --------------------------
books_1  | 
books_1  | > [email protected] start /usr
books_1  | > node index.js
books_1  | 
books_1  | Running on port 3000
books_1  | --------------------------