Deploying 3-Tier Application on Docker | Containerizing NodeJs, Mongo Express, MongoDB

https://gitlab.com/nanuchi/developing-with-docker

To start the application

Step 1: Create a docker network

docker network create mongo-network

Step 2: start MongoDB

docker run -d -p 27017:27017 -e MONGO_INITDB_ROOT_USERNAME=admin -e MONGO_INITDB_ROOT_PASSWORD=password --name mongodb --net mongo-network mongo

Step 3: start mongo-express

docker run -d -p 8081:8081 -e ME_CONFIG_MONGODB_ADMINUSERNAME=admin -e ME_CONFIG_MONGODB_ADMINPASSWORD=password --net mongo-network --name mongo-express -e ME_CONFIG_MONGODB_SERVER=mongodb mongo-express

NOTE: creating docker-network in optional. You can start both containers in a default network. In this case, just emit --net flag in docker run command

Step 4: open mongo-express from browser

http://ip address :8081

user-account db userscollection

1. Create a Dockerfile with the content you provided:

    FROM node:13-alpine
   
    ENV MONGO_DB_USERNAME=admin \
        MONGO_DB_PWD=password
   
    RUN mkdir -p /home/app
   
    COPY ./app /home/app
   
    WORKDIR /home/app
   
    RUN npm install
    EXPOSE 3000
   
    CMD ["node", "server.js"]
   

2. Save the Dockerfile in a directory along with your application code. Let's assume the directory is named "my-app".

3. Open a terminal or command prompt and navigate to the directory containing the Dockerfile and your application code ("my-app" directory).

4. Build the Docker image using the following command:

    sudo docker build -t my-app-image .
   

   This command will build the Docker image with the tag "my-app-image". The dot (.) at the end specifies the build context as the current directory.

5. Once the image is successfully built, you can run a container from it and connect it to the "mongo-network" network using the following command:

    docker run -d --name my-app-container --net mongo-network -p 3000:3000 my-app-image
   

   This command starts a container named "my-app-container" from the "my-app-image" image, connects it to the "mongo-network" network, and maps port 3000 of the container to port 3000 on the host machine.