Docker is an open-source platform designed to facilitate the development, deployment, and management of containerized applications. It allows developers to package applications along with all their dependencies into standardized units called containers. These containers can run consistently across various computing environments, ensuring that the application behaves the same way regardless of where it is deployed.
Key Features of Docker:
Containerization: Docker containers encapsulate an application and its dependencies, including libraries, system tools, and settings, ensuring that the application runs reliably across different environments[1][2][3].
Lightweight: Unlike virtual machines, Docker containers share the host system's kernel and do not require a full operating system, making them more efficient in terms of resource usage and faster to start[1][3][17].
Portability: Docker containers can run on any system that supports Docker, including various operating systems like Linux, Windows, and macOS. This portability simplifies the process of moving applications between development, testing, and production environments[1][2][3][6].
Isolation: Each Docker container runs in an isolated environment, which enhances security and ensures that applications do not interfere with each other[1][2][17].
Efficiency: Docker allows multiple containers to run on a single host machine, optimizing resource utilization and reducing costs compared to traditional virtual machines[1][2][5].
Consistency: By packaging applications and their dependencies into containers, Docker ensures that applications run consistently across different environments, reducing the risk of bugs and errors caused by differences in environment configurations[2][5][14].
Components of Docker:
Docker Engine: The core component that creates and manages Docker containers. It includes the Docker daemon (dockerd), which listens for API requests and manages Docker objects like images and containers[7][9].
Docker Client: A command-line interface (CLI) tool that allows users to interact with the Docker daemon[7][9].
Docker Hub: A public repository for Docker images, where users can share and download container images[1][7].
Docker Compose: A tool for defining and running...
