Docker is a platform for managing container-based applications. Using the container-based approach we can separate our application from the actual physical machine, and run it in a self-contained environment.
NOTES
The word “docker” means-
A person who is responsible for loading and unloading items(metal containers) on a ship.
Docker software performs the same responsibility. It packages an application in containers, and then runs and manages a container. This enables us to run applications separately that use different versions of programming language or other software.
NOTES
Docker creates an isolated environment for the application running inside it.
So the application can use any specific version of packages/libraries, and/or use any specific binary, and/or run any process, without any conflict or issue.
Benefits of using Docker
Here are the benefits of using docker, and containers in general-
As we are learning about docker, so we should also be aware of the Moby project. Let’s see what the Moby project is-
Moby
Moby works as the core of Docker. It is an open-source project, for assembling containerized applications.
The Moby project was created by docker. It was created so that container systems can be created without reinventing the wheel.
It works as a framework, and helps to build components and tools for the container ecosystem. It contains some standard components and exposes a framework, which is used by Docker. We can also build our own customized container system on top of Moby.
System engineers, hackers, and infrastructure providers can use the Moby project to provide additional functions or patch the docker/container system.
Moby uses containerd as the default container runtime. Let’s see what containerd is-
containerd
containerd is a container runtime.
Read the following articles to understand docker.
- Installation
- Image
- Container
- Dockerfile
- CMD vs Entrypoint
- Multistage
- Compose
- Volume
- File System
- Architecture
- Context
- Deployment
- Manifest
- Network
- Plugin
- Registry
- Scan
- Secret
- Security
- Service
- Stack
- Swarm
Application setup
- Golang Application Setup
- NodeJS Application Setup
- PHP Application Setup
- Python Application Setup
Docker Commands:
- run
- exec
- ps
- build
- pull
- push
- images
- login
- logout
- search
- version
- info
Docker Management commands:
- builder
- buildx*
- compose*
- container
- context
- debug*
- dev*
- extension*
- feedback*
- image
- init*
- manifest
- network
- plugin
- sbom*
- scout*
- system
- trust
- volume