Docker-Practice

html,javascript,node.js,mondodb,mongo-express

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Running with Docker Commands (Without docker-compose)

Prerequisites

• Docker installed

Steps

With Docker without using the docker-compose file

To start the application: run below commands

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 \
-e ME_CONFIG_MONGODB_SERVER=mongodb \
--net mongo-network \
--name mongo-express \
mongo-express

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

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

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

Step 2: in mongo-express UI - create a new database "user-account"

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

Step 4: start node server

npm install
node server.js

Step 5: access the nodejs application from browser

http://localhost:3000

To stop the container

docker-compose -f docker-compose.yaml down

To build a docker image from the application

docker build -t my-app:1.0 .       

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

Running the image: docker run my-app:1.0

CLI of Container: docker exec -it 307f8c51e365 /bin/sh

Setting the environment variables now

ls
env

AWS ECR(Elastic container registry)

1. login to aws with root user
2. go to ecr and create repository
3. Make sure you have image in your device of container
4. AWS provides the login command use from website itself of ecr repository. Prerequisite is AWS CLI and Credentials configured
5. Docker Tag command now to recognize which image to push to AWS
6. you can check the new image copy by docker images
7. docker push now with aws command
8. if you do changes in current docker file or code.. Go for building new image docker build -t my-app:1.1 . repeat the same process to Docker tag step 5. docker tag my-app:1.1 <AWS_ACCOUNT_ID>.dkr.ecr.<AWS_REGION>.amazonaws.com/my-app:1.1
9. docker login is done only once.

Deploying on the dev server

1. AWS ECR has image my-app and Docker hub for two MongoDB images

2. Do changes as suggested in below image in docker-compose file

3. Also added in server.js for mongodb // use when starting application as docker container let mongoUrlDocker = "mongodb://admin:password@mongodb";

4. Replace all the mongoUrlLocal in server.js by mongoUrlDocker and build image again such as it is in: MongoClient.connect(mongoUrlLocal, mongoClientOptions, function (err, client) {

5. create the docker compose file in the development server, we don't have it now, by vim docker-compose.yaml and paste the same content as we have in github repo file and

6. docker-compose -f docker-compose.yaml up

Now testers and other developers will be able to access the development and try out the application you just created