nodejs app exited with code 0 when docker-compose up

Question

I encounter the error below when running docker-compose up

nginx_1       | 2018/07/03 06:54:17 [emerg] 1#1: host not found in upstream "admin:1123" in /etc/nginx/nginx.conf:19
nginx_1       | nginx: [emerg] host not found in upstream "admin:1123" in /etc/nginx/nginx.conf:19
nginx_1 exited with code 1

docker-compose.yml

version: "2"

volumes: 
  mongostorage:  

services:  
  app:
    build: ./app
    ports:
      - "3000"
    links:
      - mongo
      - redis

    volumes:
      - ./app:/var/www/app
      - /var/www/app/node_modules

  adminmongo:
    build: ./adminMongo
    ports:
      - "4455"
    links:
      - mongo    
    command: node app.js

  admin:
    build: ./admin
    ports:
      - "1123"
    links:
      - mongo
      - redis
    command: node admin_app.js

  nginx:
    build: ./nginx
    ports:
      - "80:80"
      - "1123:1123"
      - "4455:4455"
    links:
      - app:app
      - admin:admin

  mongo:
    image: mongo:2.4
    environment:
      - MONGO_DATA_DIR=/data/db
    volumes:
      - mongostorage:/data/db
    ports:
      - "27017:27017"

  redis:
    image: redis
    volumes:
      - ./data/redis/db:/data/db
    ports:
      - "6379:6379"    

dockerfile for app

FROM node:9.8
RUN mkdir -p /var/www/app
WORKDIR /var/www/app
COPY . /var/www/app
RUN npm install -g gulp pm2 notify-send
RUN npm install 
CMD ["pm2-docker", "./bin/www"]

dockerfile for admin

FROM node:9.8
RUN mkdir -p /var/www/sibkladmin
WORKDIR /var/www/sibkladmin
COPY . /var/www/sibkladmin
RUN npm install -g gulp pm2 bcrypt
RUN npm install 

dockerfile for nginx

FROM nginx:latest

EXPOSE 80
EXPOSE 1123
EXPOSE 4455

COPY nginx.conf /etc/nginx/nginx.conf

nginx.conf

events {
  worker_connections  1024;
}

http{

    upstream app.local{
        least_conn;
        server app:3000 weight=10 max_fails=3 fail_timeout=30s;
    }

    upstream app.local:4455{
        least_conn;
        server adminmongo:4455 weight=10 max_fails=3 fail_timeout=30s;
    }

    upstream app.local:1123{
        least_conn;
        server admin:1123 weight=10 max_fails=3 fail_timeout=30s;
    }



    server {
        listen 80;

        server_name app.local;

        location / {
            proxy_pass http://app.local;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
        }
    }

    server {
        listen 1123;

        server_name app.local:1123;

        location / {
            proxy_pass http://app.local:1123;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
        }
    }

    server {
        listen 4455;

        server_name app.local:4455;

        location / {
            proxy_pass http://sibklapp.local:4455;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
        }
    }
}

Updated:

Error received after docker-compose build

npm ERR! path /var/www/admin/node_modules/bcrypt/node_modules/abbrev
npm ERR! code ENOENT
npm ERR! errno -2
npm ERR! syscall rename
npm ERR! enoent ENOENT: no such file or directory, rename '/var/www/admin/node_modules/bcrypt/node_modules/abbrev' -> '/var/www/admin/node_modules/bcrypt/node_modules/.abbrev.DELETE'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2018-07-05T10_03_43_640Z-debug.log
ERROR: Service 'admin' failed to build: The command '/bin/sh -c npm install' returned a non-zero code: 254

Answer 1

Can you try:

NGINX dockerfile

Change:

COPY nginx.conf /etc/nginx/nginx.conf

to

COPY nginx.conf /etc/nginx/nginx.conf.d

Remove EXPOSE ports no need to expose ports.

Compose File

Update compose file to:

version: "2"

volumes: 
  mongostorage:  

services:  
  app:
    build: ./app
    ports:
      - "3000:3000"
    links:
      - mongo
      - redis
    volumes:
      - ./app:/var/www/app
      - /var/www/app/node_modules
    command: node app.js

  adminmongo:
    build: ./adminMongo
    ports:
      - "4455:4455"
    links:
      - mongo    
    volumes:
      - ./adminMongo:/var/www/adminMongo
      - /var/www/adminMongo/node_modules
    command: node app.js

  admin:
    build: ./admin
    ports:
      - "1123:1123"
    links:
      - mongo
      - redis
    volumes:  
      - ./admin:/var/www/admin
      - /var/www/admin/node_modules
    command: node admin_app.js

  nginx:
    build: ./nginx
    links:
      - app:app
      - admin:admin

  mongo:
    image: mongo:2.4
    environment:
      - MONGO_DATA_DIR=/data/db
    volumes:
      - mongostorage:/data/db
    ports:
      - "27017:27017"

  redis:
    image: redis
    volumes:
      - ./data/redis/db:/data/db
    ports:
      - "6379:6379"    

NOTE I created a simple node hello world app to test, you will need to update the command: to match what you have in package.json

Also Before you start your app run these commands to clean up any old containers/networks:

    docker-compose kill
    docker-compose down
    docker network prune
    docker volume prune

To start the services Run:

docker-compose build

prob overkill but makes sure you're not using old containers

docker-compose up --force-recreate

Local Test Output

    mongo_1       | Wed Jul  4 21:50:35.835 [initandlisten] waiting 
    for connections on port 27017

    mongo_1       | Wed Jul  4 21:50:35.835 [websvr] admin web console 
    waiting for connections on port 28017

    app_1         | app listening on port 3000!
    admin_1       | admin app listening on port 1123!
    adminmongo_1  | AdminMongo app listening on port 4455!

    redis_1       | 1:M 04 Jul 21:50:26.523 * Running mode=standalone, 
    port=6379.