Docker for nodejs and mongo

docker-dump

-----------------------------------Install docker
$ sudo apt-get update
$ sudo apt-get install docker.io

-----------------------------------Add user to docker (to avoid using sudo)
https://askubuntu.com/a/477554/642604

$ sudo groupadd docker
$ sudo gpasswd -a $USER docker
$ newgrp docker

-----------------------------------Install docker-compose
$ sudo curl -L https://github.com/docker/compose/releases/download/1.19.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
$ sudo chmod +x /usr/local/bin/docker-compose

-----------------------------------download reqd images (mongo and alpine-node)
$ docker pull mongo
$ docker pull node:8.9.4-alpine

$ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
mongo               latest              43099507792a        5 days ago          366 MB
node                8.9.4-alpine        406f227b21f5        9 days ago          68.1 MB


----------------------------------- this is the dockerfile
# deploy/Dockerfile
# Dockerfile for your app.

FROM node:8.9.4-alpine



# you are now root.

#Add the current working directory to docker's /home/
ADD . /home
WORKDIR /home/programs/server

# since we are using alpine-node, we need the below compilers to compile native modules
RUN apk add --no-cache make gcc g++ python \

# Install NPM packages
&&  npm install \

# Install forever.js
&& npm install -g forever



# Set up a normal user and be that user since
# it's not advisable to be root.
# https://medium.com/@mccode/processes-in-containers-should-not-run-as-root-2feae3f0df3b
# but this images does not contain groupadd
# so use addgroup / adduser instead ==> https://github.com/mhart/alpine-node/issues/48

RUN addgroup -S appuser && adduser -S -G appuser appuser
USER appuser


# You are now appuser

# Set environment variables
WORKDIR /home
# ENV PORT 3000
#ENV ROOT_URL http://127.0.0.1
#ENV MONGO_URL mongodb://mongodb_service:27017/mydb

# Expose port 3000
#EXPOSE 3000

# Start the app

CMD ["forever", "--minUptime", "1000", "--spinSleepTime", "1000", "./main.js"]
#CMD node ./main.js



--------------------------------------docker-composer.yml
version: '3'
services:
    myapp1:
        build: ~/experimental/app1
        container_name: "app1_container"
        image: app1_img
        #dockerfile: ~/experimental/app1/dockerfile
        environment:
            - NODE_ENV=development
            - PORT=3000
            - ROOT_URL=http://127.0.0.1
            - MONGO_URL=mongodb://mongodb_service:27017/mydb
        # volumes:
            # - .:/var/www:rw
            # - /tmp/.X11-unix:/tmp/.X11-unix:rw
        ports:
            - 3000:3000
            # - 9000:9000
        restart: always #restarts on reboot
        links:
            - mongodb
        depends_on:
            - mongodb
    myapp2:
        build: ~/experimental/app2
        container_name: "app2_container"
        image: app2_img
        #dockerfile: ~/experimental/app2/dockerfile
        environment:
            - NODE_ENV=development
            - FOO=bar
            - PORT=4000
            - ROOT_URL=http://127.0.0.1
            - MONGO_URL=mongodb://mongodb_service:27017/mydb

        # volumes:
            # - .:/var/www:rw
            # - /tmp/.X11-unix:/tmp/.X11-unix:rw
        ports:
            - 4000:4000
            # - 9000:9000
        restart: always #restarts on reboot
        links:
            - mongodb
        depends_on:
            - mongodb

    mongodb:
        image: mongo:latest
        container_name: "mongodb_service"
        environment:
          - MONGO_DATA_DIR=/var/lib/mongodb
          - MONGO_LOG_DIR=/var/lib/mongodb
        volumes:
          - ./data/db:/data/db #map ./data/db of host to /data/db of container
        restart: always #restarts on reboot
        ports:
            - 27017:27017
        # command: mongod --smallfiles --logpath=/dev/null   # --quiet