GeekySkill

Top 8 must-know Docker concepts by Alex Xu

1 - Dockerfile: It contains the instructions to build a Docker image by specifying the base image, dependencies, and run command.

2 - Docker Image: A lightweight, standalone package that includes everything (code, libraries, and dependencies) needed to run your application. Images are built from a Dockerfile and can be versioned.

3 - Docker Container: A running instance of a Docker image. Containers are isolated from each other and the host system, providing a secure and reproducible environment for running your apps.

4 - Docker Registry: A centralized repository for storing and distributing Docker images. For example, Docker Hub is the default public registry but you can also set up private registries.

5 - Docker Volumes: A way to persist data generated by containers. Volumes are outside the container’s file system and can be shared between multiple containers.

6 - Docker Compose: A tool for defining and running multi-container Docker applications, making it easy to manage the entire stack.

7 - Docker Networks: Used to enable communication between containers and the host system. Custom networks can isolate containers or enable selective communication.

8 - Docker CLI: The primary way to interact with Docker, providing commands for building images, running containers, managing volumes, and performing other operations.

Over to you: What other concept should one know about Docker?