Docker and other containerization tools have taken the devops world by storm. Knowing at least the basics of docker has become mandatory for any role of software development you are in. However, for devops engineers/ site reliability engineers, a more detailed understanding of docker and other containerization technologies are desired. It does not entirely cut it to know just how to run basic commands on docker and make it work.

This course focuses on how docker works under the hood. It will guide you through the internal workings of the docker daemon and it’s interaction with the linux operating system step by step and explain how docker uses various linux kernel functionalities to make and run containers.

Besides a look at how docker operates under the hood, we will also take a look at basic docker commands, structure of build files etc-. We will also take a look at how to use docker compose to stand up a basic development environment for micro services. We will also look at building minimal container images to save on network throughput, disk size and also faster deployments. We will also be looking at what container orchestrators are and will have a hands-on session about the amazon ECS container orchestrator.

A bit of networking and linux knowledge is assumed for this course. Linux knowledge will help you all throughout the course and networking knowledge will come in handy when we cover the concepts pertaining to networking namespaces.

Course Details:

1. Description

2. Introduction and why we chose linux for the course.

3. Description on what docker is and why we use it

4. Birds eye view of various components in docker and it's interaction with OS

5. Differerence between user-space and kernel-space

6. Difference between containers and virtual machines.

7. Dockerfile, Docker images, Base image, docker pull

8. docker build, Running docker without root privileges

9. docker history command, From construct, ENV construct

10. Label construct, RUN construct, WORKDIR construct

11. ADD construct, COPY construct, EXPOSE construct, ENTRYPOINT construct, CMD construct, docker run command

12. docker repositories,docker hub, docker push,How is traffic routed to docker container?

13. docker ps command, sending signals to a process( docker kill, dockerstop)

14. How docker containers handle signals.

15. Introduction to how docker works under the hood

16. Introduction to cgroups

17. Cgroups cpu- hands on 1

18. Cgroups cpu- hands on 2

19. Cgroups cpu- hands on 3(cpu shares)

20. Cgroups cpu- hands on 4( cpuset + cpu share)

21. How docker restricts cpu using cgroups.

22. Introduction to cgoups memory subsystem

23. Cgroups memory subsystem hands-on

24. Introduction to namespaces

25. Basic networking and tcpdump

26. Ip subnetting and arp

27. ip,veth pairs, linux software bridge

28. Hands-on networking namespace.

29. How docker uses networking namespace

30. Pid namespaces hands-on

31. Mount namespaces hands-on

32. User namespaces hands-on

33. Introduction to linux capabilities + hands on

34. Capabilities in docker

35. Running docker containers as root

36. Docker compose introduction

37. Bringing up an application

38. Embedded dns, docker networks

39. Introduction to overlayfs

40. How docker uses overlayfs

41. How to take advantage of caching in docker builds

42. Building minimal containers in docker

43. Container orchestrators introduction

44. Overview of ECS orchestrator

45. Hands on(part 1)

46. Hands on(part 2)

47. ECS under the hood.

48. Introduction to docker daemon

49. Communicating to docker daemon over tcp/unix socket.