/developing-with-docker-nan-dbc

Docker based development

Primary LanguageHTML

Demo app - With Express & Mongo

This demo app shows a simple user profile app set up using

  • index.html with pure js and css styles
  • nodejs backend with express module
  • mongodb for data storage

All components are docker-based

With Docker

To start the application

Step 1: Create 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 is 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://localhost:8081

Step 5: create user-account db and users collection in mongo-express

Step 6: Start your nodejs application locally - go to app directory of project

cd app
npm install 
node server.js

Step 7: Access you nodejs application UI from browser

http://localhost:3000

With Docker Compose

To start the application

Step 1: start mongodb and mongo-express

docker-compose -f docker-compose.yaml up
docker-compose -f docker-compose.yaml down

You can access the mongo-express under localhost:8080 from your browser

Step 2: in mongo-express UI - create a new database "my-db"

Step 3: in mongo-express UI - create a new collection "users" in the database "my-db"

Step 4: start node server

cd app
npm install
node server.js

Step 5: access the nodejs application from browser

http://localhost:3000

Build a docker image from the application

docker build -t my-app:1.0 .   
docker run my-app:1.0

The dot "." at the end of the command denotes location of the Dockerfile.

Deploying our containerized application on server

Create private Docker Registry on Amazon ECR Log into private registry (Copy command from ECR) Tag Docker Image using -> ECRregistryDomain/imageName:tag

docker tag my-app:1.0 ECRregistryDomain/my-app:1.0

Push Docker Image to AWS ECR repository

docker push ECRregistryDomain/my-app:1.0

Add our example application to Dockerfile Change mongodb server url from localhost to mongodb service name in Node Code Start docker containers with docker-compose

docker-compose -f docker-compose.yaml up