This project covers following concepts:

1. Basics of Docker
2. docker-compose

Docker

To check if docker is installed

docker --version

To build docker custom image

docker build -t <docker_hub_ID>/<custom_image_name> .

docker build -t ishahroz/simple-dockerized-node-app .

To run docker custom image

docker run <docker_hub_ID>/<custom_image_name>

docker run ishahroz/simple-dockerized-node-app

To run docker custom image with port forwarding/mapping

docker run -p <local_port>:<container_port> <docker_hub_ID>/<custom_image_name>

docker run -p 8080:8080 ishahroz/simple-dockerized-node-app

To run docker custom image by overriding startup command and accessing shell instead

docker run -it <docker_hub_ID>/<custom_image_name> sh

docker run -it ishahroz/simple-dockerized-node-app sh

To display all the containter (processes) running

docker ps

Docker Restart Policies

docker-compose

Docker-compose makes it very easy for networking between containers since Docker maintains its internal hostname scheme between containers. It assumes docker-compose.yml file exists in the project directory.

To run containers using docker-compose

docker-compose up

To both build run containers using docker-compose

docker-compose up --build

To run containers using docker-compose in background

docker-compose up -d

To stop containers using docker-compose

docker-compose down

To display all the containter (processes) running using docker-compose

It assumes your terminal is opened in the same directory as of docker-compose.yml file.

docker-compose ps