DevOps Classroom notes 10/May/2026

Docker Architecture – 5000 feet overview

• Docker when installed, will have two major components
  • client: a cli tool to interact with server
  • Daemon: this does the heavy lifting
• To create a process we need an executable (application), Generally from one executable i can create multiple instances of applications, eg: multiple word documents, multiple chorme windows
• In docker we create containers and to create container we need image.
• Images are available in registry. There are
  • public registries
  • private registries
• Docker default registry is docker hub

What happens when we try to create a container

• Command: I want to create an nginx container

docker run -d --name web1 -P nginx

Installing docker

• Gen-AI Students: Install docker desktop
  • Refer Here for windows
  • Refer Here for mac
• windows use winget and mac use homebrew
• Server side: Lets create a ubuntu linux vm
• Easy way to install docker

curl -fsSL https://get.docker.com -o install-docker.sh 
sh install-docker.sh

• Add your current user to docker group

sudo usermod -aG docker ubuntu
# exit and relogin
docker info
# you should see client as well as server version