DevOps Classroom notes 26/Jan/2025

Playing with Containers

• For this we have three options
  • Docker Playground: We get a playground i.e. linux vm with docker pre-installed to explore docker containers
  • Install Docker Desktop on your laptop
  • Install Docker on a linux vm (Azure/AWS)
• For using Docker Playground create a docker hub account

Exploring docker command line

• Docker cheatsheet

Creation, Stop and Start, Delete Containers

• For all of the below commands i would be using nginx image
  
• Every container will have a unique id and name, if you donot set the name, docker engine will give random name
  
• Lets explore container states
  • create vs run (watch classroom video for commands)
  • deleting all containers docker rm -f $(docker ps -a -q)
• Pause and unpause we will deal later.

Running and understanding containers

• Lets create a container and try to findout what is happening inside the container

Find commands in linux

• How to get all the processes running
• How to get all users
• how to find ip address
• how to get cpu and memory utilization
• Now execute them on host
• Now create a container and login into it

docker run -it nginx /bin/bash

• Note: Execute the commands on host and inside the container