Image Source: Wikipedia

Terminology

• Image: read-only template to build a container. May be based on another image
• Container: a runnable instance of an image
• Volume: a persistent storage location outside a container

Docker Components

• Docker Engine
  • Docker Daemon
  • Docker Client
• Docker Desktop
• Docker Compose
• Registry

Docker Commands

• pull - Download an Image
• images - List images
• run - Create a Container
• start | stop - Start/Stop Container
• ps - List Running Containers
• exec - Run Command in Container
• logs - View Container Logs

Docker Images

• Docker Hub
• Other Repositories
• Tags
• Alpine vs. Others
• Official vs. Community

Show Docker Hub

• Official Images
• Hello World
• Nginx

Commands

• docker pull hello-world
• docker run hello-world
• docker run --name nginx -d nginx:alpine
• docker ps
• docker exec -it nginx /bin/sh
• curl localhost:80
• docker stop nginx
• docker container prune

Open Questions

• How to access outside Docker?
• How to host own files in Nginx?
• How to persist data from Containers?
• How to simplify Docker commands?