Docker Architecture: How It Works Behind the Scenes Docker simplifies containerization, allowing developers to build, ship, and run applications anywhere. But how does it work under the hood? Let's break down Docker's architecture and its core components. 1️⃣ What is Docker? Docker is a lightweight containerization platform that allows you to package applications and their dependencies into isolated environments called containers. 💡 Why use Docker? ✅ Consistent development & production environments ✅ Faster deployment & scaling ✅ Works across different OS without compatibility issues ✅ Efficient resource utilization 2️⃣ Docker Architecture Docker follows a client-server architecture consisting of: 🔹 Docker Client (CLI) Users interact with Docker through commands like docker run, docker build, docker ps. The client talks to the Docker daemon using REST API over UNIX socket or TCP. 🔹 Docker Daemon (dockerd) The brain behind Docker! Runs in the background, listens for API requests, and manages Docker objects like containers, images, volumes, and networks. Works with the container runtime to execute containers. 🔹 Docker Engine The core of Docker, responsible for: ✅ Building images ✅ Running containers ✅ Managing networking & storage 🔹 Docker Images Blueprints for containers—includes everything needed to run an application (code, dependencies, configs). Stored in Docker Hub or private registries. Built using a Dockerfile. 🔹 Docker Containers Running instances of images. Isolated environments that share the host OS kernel but have their own filesystem, networking, and processes. Created using docker run
