Docker

Abstract

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• 3 components - Docker Container, Docker Image & Dockerfile
• Built on top of Linux Namespace, so on Windows & Mac, we have a hidden Linux VM
• Less secure compared to Podman, because it has Daemon which needs root access to work

Working with Apple Silicon

--platform linux/amd64 flag is needed. Refer to ISA Unmatch error

Docker Engine

• The whole package, which includes Daemon as one of its components. Other 2 components are REST API interface and Docker CLI which provide access to Daemon

Daemon

• Background service running on the host that manages the containers created by the Docker Engine
• Single source of failure & requires root access
• Built on top of Runtime

Runtime

• Used to interact with Kernel
• There are many options, the one docker uses is containerd

Docker Installation

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MacOS

• brew install orbstack - orbstack is a much lightweight GUI to manage the containers, comes with Docker Engine

Ubuntu

• Install Docker Engine with curl -sSL https://get.docker.com | sh
• Install Docker Desktop(Optional)
• We can add user to the docker group with sudo usermod -aG docker <USERNAME>

Fix missing dependencies

sudo apt --fix-broken install

Useful Docker Images

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Networking

• wbitt/network-multitool - docker run -d --name eff1 --hostname eeg1 wbitt/network-multitool