Kubernetes & Docker: The Complete Hands-On Guide

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Open-source system for automating deployment, scaling, and management of containerized applications

Section 1: Kubernetes Introduction

• What is Kubernetes
• Why do we use Kubernetes?
• Monolithic approach for developing applications.
• Microservices Vs. Monolithic
• Kubernetes Gateway API
• Evolution of Containers, Dockers & VMs
• Microservices running as containers
• Kubernetes – Orchestration or container management tool
• Features of Kubernetes 

Section2: Architecture of the Kubernetes Cluster

• The architecture of the Kubernetes Cluster
• Understand architecture with various examples
• Working with Kubernetes
• Roles of Master Node
• Components of Control Plane (Master Node)
• API Server
• Etcd
• Scheduler
• Controller Manager
• Kubelet
• Service Proxy
• POD
• Container Engine – Docker, Containerd, or Rocket

Section 3: Setup of Kubernetes Cluster AWS Environment

• Setup Kubernetes Master and Worker Node on AWS Environment
• Update the System
• Install HTTP package
• Docker Installation
• Setup open GPG Key
• Install the Kubernetes packages
• Bootstrapping the master node
• Configure Worker Nodes

Section 4:  Kubernetes Concepts – Cluster types, Minikube Server, YAML, Pod, Kubelet, Ports

• Kubernetes  Cluster
• Types of Cluster
• All-in-one (Single Node Cluster)
• Single-node, single-master, and multi-worker node clusters.
• Single-Node etcd, multi-Master, and Multi-Worker Node Cluster.
• About Minikube 
• Installation of Minikube Server
• Create the first POD using manifest file written in YAML Language
• Kubelet commands
• Check logs of the container
• Create multiple containers in a POD
• Kubernetes Annotations
• Variables in the YAML file
• Defining Ports 

Section5: Labels & Selectors

• Labels & Selectors
• Commands for managing labels & selectors
• Declarative vs. Imperative Kubernetes commands
• Two types Selectors
•   Equality Based
•   Set based
• Practice Lab – Labels & Selectors
• Practice Lab – Assign a label to the running POD
• Practice Lab – Search the pod with equality & set-based
• Node Selector
• Lab – Create a pod on a specific node 

Section 6: Scaling & Replication

• What is ReplicationController?
• Features of RC
• Practice Lab – Create Replicas of POD using RC
• Practice Lab – Recreate the POD, if it crashes, fails, or terminated
• Scale up & scale down the POD as the load increases
• Practice Lab – Scale up & scale down the POD
• What is ReplicaSet?
• Difference between ReplicationController & ReplicaSet
• Practice Lab – Create Replicas of POD using ReplicaSet
• Practice Lab – Use set-based match expressions in RS 

Section 7: Deployment & Rollback

• Overview of Deployment and Rollback
• Manifest for a POD with one container using the deployment object.
• Lab: Launch an application with two PODs using the deployment object.
• Lab: Using the deployment object, upgrade an application from version 1 to version 2.
• Lab: Roll back the application to the previous version.
• Lab: Roll back the application to any specific version. 

Section 8: Kubernetes Networking

• Overview of Kubernetes Networking
• Container communication via localhost
• Practice Lab – container-to-container communication on specific port within a pod
• Pod-to-pod communication
• Practice Lab – Pod-to-pod communication
• Object – Service
• Why service is required?
• Service type
• Cluster IP
• NodePort
• LoadBalancer
• Headless
• Practice Lab – Access the appl/service using cluster IP within the cluster using the service object
• Practice Lab – Access the appl/service using NodePort outside the cluster using the service object 

Section 9: Volumes in Kubernetes Cluster

• Overview of Volumes in Kubernetes Cluster.
• Volume types
• EmptyDir
• hostpath
• Practice Lab: Create a POD with attached volume using volumes.
• Practice Lab – Attach a shareable volume for containers within a POD.
• Practice Lab – Attach a shareable volume for containers within a POD as well as with the host or worker node.
• Practice Lab – EmptyDir
• Practice Lab – hostpath 

Section 10: Persistent Volumes

• Overview of Persistent volumes
• PersistentVolumeClaim – PVC
• Configure a Volume using AWS ElasticBlockStore
• Configure a Pod to Use a PersistentVolume for Storage
• Practice Lab – Create a PersistentVolume
• Practice Lab – Create a PersistentVolumeClaim
• Practice Lab – Create a Pod to Use a PersistentVolume for Storage 

Section 11: Introduction to docker containers

• Introduction about containers
• Installation of Docker
• Create a first container
• Fetch container image from docker hub
• Run a container in the background, interactive with tty terminal
• Delete exited dockers using a single command
• Get complete details of a running container
• Check logs & stats of a running container
• Port forwarding
• exec, rename & restart the running container
• Attach a container
• Kill/stop, pause/unpause a container
• Create, start, the cp command
• Export/Import Command in Docker
• Create an image from a running container
• Pull a specific version image from the Docker hub
• Image history, inspect & remove the image 

Section 12: Dockerfile

• Overview of Dockerfile, layered architecture
• Create centos 7 images using Dockerfile
• Overview of LABEL, ENV & RUN Command
• Overview of WORKDIR
• Copy, and add commands with their differences
• Create a user account with a password using dockerfile
• CMD Command
• SSH to a container
• Overview of EXPOSE Command
• ENTRYPOINT in Dockerfile 

Section 13: Manage Data in Docker

• Overview of managing data in Docker
• Volumes
• Create & attach a volume to a container
• Delete volumes from the Docker host machine
• Bind mounts 

Section 14: Networking in Docker

• Bridge networking
• Run containers in custom-created bridge networking
• Enable communication between dockers belonging to different bridge network
• DNS enabled with custom bridge networking
• Host networking
• None networking
• Connect one or more networks to a running container
• Create a private docker registry
• How to allow images in the private registry for non-secure network 

Section 15: Docker Compose

• Overview of docker-compose
• Docker compose Installation
• Create my first docker-compose file
• Create the docker-compose file in JSON language
• Learn basic commands
• docker-compose up
• docker-compose down
• docker-compose create
• docker-compose start
• docker-compose stop
• docker-compose rm
• docker-compose images
• docker-compose ps
• docker-compose pause
• docker-compose unpause
• docker-compose kill
• docker-compose port port
• docker-compose logs
• docker-compose exec
• docker-compose run
• docker-compose scale
• docker-compose top
• Attach a volume & port mapping using docker-compose
• Build a custom image using docker-compose
• Last lecture

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