Introduction
- Virtualization software
- Makes developing and deploying applications much easier.
- Packages apps with all their dependecies, configuration, system tools and runtime.
- Standardizes process of running any service on any dev environment.
Docker Architecture.
- Virtualizes the application layer of the operating system as opposed to the Vm which virtualizes the kernle layer.
- Docker Engine
- a server that is running dockerd
- manages images and containers
- Docker CLI - Client
- cli to interact with docker server.
- Docker Images
- an executable application artifact
- includes app spurce code, but also complete configuration
- add environment variables, create directories and files
- Docker Containers
- running instance of an image
- can run multiple containers from one container
- Docker Registry
- repository of docker images with their corresponding tags
docker pull image_name or docker run immediately
- Docker port binding
- forward container port to our network port