Docker & Kubernetes: The Practical Guide [AWS Platform]

Course Description:

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

Section 5: Kubernetes Pod Restart Policy

• Overview of Pod Restart Policies

• Three restart policies: Always, OnFailure & Never

• Lab - Create a pod definition with ‘restartPolicy’ as Always

• Lab - Create a pod definition with ‘restartPolicy’ as OnFailure

• Lab - Change the pod definition a bit to check the working of OnFailure

• Lab - 4. Create a pod definition with ‘restartPolicy’ as Never

Section 6: 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 7: 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 8: 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 9: 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 10: 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 11: 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 12: Namespaces in Kubernetes

• Overview of Namespaces

• Lab - Create new namespaces

• Lab - Create Pod and Service in Namespaces

• Lab - Switch between Kubernetes namespaces

• Lab - Create pods in the namespace.

• Lab - delete a Kubernetes namespace

Section 13: Resource Management for Pods and Containers

• Overview of resource management for pods, containers

• Lab resource-based quota

• Lab - Apply pod quotas to namespaces

• Requests and Limits

• Lab - Set requests and limits in each container running in a pod.

• Lab - Apply quotas to namespaces

• Lab - Create pods with resources in namespaces

Section 14: Kubernetes HPA - Horizontal Pod Autoscaler

• Kubernetes autoscaling basics

• Lab: Configuring Minikube Cluster

• Lab: Installation of Metric Server

• Lab: Creating pods using deployment objects

• Lab: Configure HPA - Horizontal Pod Autoscaler

• Lab: A new pod is created automatically if the CPU load reaches a threshold value

• Lab: A new pod is automatically terminated if the CPU load falls below the threshold value

Section 15: Kubernetes Jobs, Init container

• Overview of Jobs and cron job pattern

• Lab: Create a Pod Using Job Object

• Lab: Run Multiple Pods in Parallel Using Job Object

• Lab: Create jobs on a repeating schedule using CronJob

• About Init Container and their use cases

• Lab: Init Container

Section 16: 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 17: 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 18: 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 19: 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 20: 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 <servername> 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

Section 21: Real-time project - Deploy an application to a Kubernetes cluster using Jenkins CI/CD pipeline, Ansible, Docker, Git, Webhook etc.