DOCKER BASICS FOR BEGINNER

Sugash Srimari R — Thu, 20 Feb 2025 06:36:11 +0000

Introduction

In today's fast-paced development world, Docker has become an essential tool for developers. Whether you're building web applications, microservices, or AI-powered tools, Docker simplifies deployment and ensures consistency across environments. If you're new to Docker, this guide will help you get started with the basics!

   docker --version

Run a test container:

   docker run hello-world

Key Docker Concepts

Images: Blueprints for containers, stored in Docker Hub or locally.
Containers: Running instances of images.
Dockerfile: A script containing instructions to build an image.
Volumes: Persistent storage for containers.
Networks: Enable communication between containers.

Basic Docker Commands

List running containers:

  docker ps

Start a container:

  docker run -d -p 8080:80 nginx

Stop a container:

  docker stop <container_id>

Remove a container:

  docker rm <container_id>

Build an image from a Dockerfile:

  docker build -t myapp .

Creating Your First Dockerized Application

Create a Dockerfile:

   FROM node:18
   WORKDIR /app
   COPY . .
   RUN npm install
   CMD ["npm", "start"]
   EXPOSE 3000

Build and run your container:

   docker build -t mynodeapp .
   docker run -p 3000:3000 mynodeapp

Conclusion