Understanding Kubernetes Architecture

• Kubernetes Cluster Architecture
• Kubernetes API Primitives
• Kubernetes Services and Network Primitives

Introduction to Kubernetes

• Overview of Dockers and Containers
• What is Container Orchestration?
• Evolution of Kubernetes
• Differences between Kubernetes and Docker Swarm
• What is Kubernetes
• Kubernetes Use Cases

Managing the Kubernetes Cluster

• Upgrading the Kubernetes Cluster
• Operating System Upgrades within a Kubernetes Cluster
• Backing Up and Restoring a Kubernetes Cluster
• ETCD
• Kube-API Server
• Controller Manager Scheduler
• kubelet
• Installation of kubelet in worker nodes in kubeadm method kube proxy
• PODs
• Pods creation using yaml file ReplicaSets
• ReplicaSet creation using yaml file Deployments
• Deployment creation using yaml file Services, Service Cluser IP
• Service creation using yaml file Job Scheduling Using Kubernetes Scheduler

Working with Namespaces and Pods

• Overview of Namespaces and creating Namespaces
• Introduction to Pods
• Pods Lifecycle
• Working with YAML files
• Working with Pods to manage multiple containers
• Deploying Pods using kubectl run command.

Scheduling Pods

• Manual Scheduling
• Scheduling Pod using Binding Labels and Selectors
• Labels and Selectors in ReplicaSet Resource Requiments and Limits
• Create a POD with resource requirement & Limit DeamonSets
• Create DaemonSets Static Pods
• Multiple Scheduler
• Docker commands instead of kubectl commands in static POD Assisted Practice: Multiple Scheduler – Introduction
• Configure the POD with custom scheduler Assisted Practice: Create custom scheduler in Kubeadm Task Allocation Using Kubernetes Scheduler

Application Lifecycle Management

• Overview of Deployments
• Scale-out deployments using ReplicaSets
• Rolling Updates with Deployments
• Working with Labels and Selectors
• Application Health Checks – Liveness Probes, Readiness Probes
• Using Secrets and Config Maps
• Working with Jobs

Logging and Monitoring

• Monitor Cluster Components
• Install and configure Metric Server Managing Application Logs
• kubectl top commands
• Viewing logs in multicontainer POD Health Monitoring Using Kubernetes

Application Lifecycle Management

• Rolling Updates and Rollbacks
• Deployment rolling update with kubectl rollout (command) Assisted Practice: Deployment rolling update with editing the Deployment file Assisted Practice: Rollout status check
• Rollout pause and resume
• Rollbacks with command and deployment file Assisted Practice: Updating the rollback deployment method Configure Applications
• Commands and Arguments
• Create a Pod with ‘echo host name’ commands Assisted Practice: Create a Pod with ‘sleep 3600’ arguments Configure Environmental variables n applications
• Create a Pod with environment of ‘sample environment’ Configuring ConfigMaps in Applications
• Create a configmap from the values with variable Assisted Practice: Create a configmap from file
• Create a configmap from env file
• Configure a configmap as a file in the POD Assisted Practice: Configure a configmap as a variable in the POD Assisted Practice: Configure a configmap as a volume in the POD Scale Applications
• Scale up application with more replicas Assisted Practice: Scale down application with less replicas Assisted Practice: Scale up and Down with kubectl command Multi-container PODs
• Create a multi container pod which access same volume Multi-container PODs Design Patterns
• InitContainers
• InitContainers Demonstration Self Healing Applications
• Autoscaling and Cluster Resource Management

Cluster Maintenance

• OS Upgrades
• Drain node Assisted Practice: Cordon node Assisted Practice: Uncordon node Kubernetes Software versions Cluster Upgrade Process
• kube-apiserver Assisted Practice: kubelet and kube-proxy Backup and Restore Methods
• Backup Resource configs Assisted Practice: Backup etcd
• Restore etcd
• CICD (Continues Integration and Continues Deployment)

Security and Authentication

• Kubernetes Security Primitives Authentication
• TLS
• Certificates API Kubeconfig
• Persistent key/value store API Groups
• Role Based Access Controls
• RBAC role creation Assisted Practice: Cluster Role Creation Cluster Roles and Role Bindings
• Associate the user with the role Assisted Practice: Associate the user with Cluster Role Image Security
• Secrets with private registry info stored Network Policy
• Create network policy
• Modify the pod settings to associate with Network policy Authentication and Authorization

Managing Data in the Kubernetes Cluster

• Persistent Volumes
• Volume Access Modes
• Persistent Volume Claims
• Storage Objects
• Applications with Persistent Storage

Storage and Volumes

• Volumes
• Create a volume with Declarative (Yaml) Assisted Practice: Create a volume with Host path (Host Drive) Assisted Practice: Create a volume with Empty Dir (Auto deletion) Assisted Practice: Create a volume with nfs share
• Persistent Volumes
• Introduction to Persistent volume
• Create a persistent volume with declarative (yaml) Persistent Volume Claims
• Introduction to Persistent volume claims
• Create a persistent volume claims with declarative (yaml) Application Configuration
• Pod Creation with volumes
• Pod Creation with Persistent volume Claims Deploy Large scale Applications

Troubleshooting: Application Failures, Control Panel Failures, and Network Failures

• Application failure
• Application Failure – Check POD, Logs and Events Control Panel Failure
• Check controlplane failure status in POD and service Worker Node Failure
• Check Node status, describe node to know cause Assisted Practice: Top command to check node performance Assisted Practice: Connectivity with master and cert status Assisted Practice: Worker node failure checks
• Networking Failure
• Service connectivity check Assisted Practice: Nslookup check
• kube-proxy check and CNI plugin check Assisted Practice: Network failure check in above stuffs Debugging

Kubernetes Schedulings

• Overview of kube-scheduler
• Scheduling with kube-scheduler
• Scheduler Policies
• Horizontal Pod Autoscaling
• Affinity and Anti-Affinity

Troubleshooting in Kubernetes

• Troubleshooting Application Failure
• Troubleshooting Control Plane Failure
• Troubleshooting Worker Node Failure
• Troubleshooting Networking