LFS458 Kubernetes Administration with Effective Exam Preparation

Seminarziel

Companies' goals in Kubernetes administration include:

• Efficient application deployment
• Scalability and availability
• Resource optimization
• Robust and secure infrastructure
• Efficient troubleshooting and issue resolution
• Automation and DevOps integration
• Cost optimization
• Agility and innovation

Inhalt

 Introduction to Kubernetes

• Containerization and orchestration overview
• Kubernetes architecture and components
• Installing and configuring a Kubernetes cluster

 Managing Pods and Deployments

• Creating and managing Pods
• Configuring Pod networking and storage
• Scaling applications with Deployments

 Configuring Services and Networking

• Creating and managing Services
• Implementing service discovery and load balancing
• Configuring network policies and Ingress controllers
  
  

 Managing Persistent Storage

• Understanding storage options in Kubernetes
• Creating and managing Persistent Volumes and Persistent Volume Claims
• Configuring dynamic volume provisioning

 Managing Kubernetes Configurations

• Working with ConfigMaps and Secrets
• Managing environment variables in Pods and Deployments
• Using Helm for package management and deployment

 Monitoring and Logging

• Implementing monitoring and metrics collection with Prometheus and Grafana
• Configuring logging with fluentd and Elasticsearch
• Troubleshooting and optimizing cluster performance
  
  

 Securing Kubernetes

• Implementing RBAC (Role-Based Access Control)
• Securing cluster communication with TLS certificates
• Enforcing security policies with Pod Security Policies

 Managing Cluster Upgrades and High Availability

• Performing cluster upgrades and rolling updates
• Configuring multi-master setups and node redundancy
• Planning for disaster recovery and backup strategies

 Troubleshooting and Debugging

• Identifying and resolving common issues and errors
• Troubleshooting networking and application problems
• Debugging Pods and examining container logs
  
  

 Advanced Networking and Service Meshes

• Implementing advanced networking features, such as Network Policies and Ingress controllers
• Exploring service mesh technologies like Istio and Linkerd

 Autoscaling and Resource Management

• Implementing Horizontal Pod Autoscaling (HPA)
• Managing resource quotas and limits
• Understanding cluster resource utilization and optimization

 Kubernetes Federation and Multi-Cluster Management

• Exploring Kubernetes federation for managing multiple clusters
• Configuring and managing multi-cluster deployments

 Exam Preparation and Review

• Reviewing key concepts and exam topics
• Practicing with sample exam questions and scenarios
• Q&A session and clarifications
  
  

Sample Questions
Which component of Kubernetes is responsible for scheduling Pods to run on available nodes?
a) kube-apiserver
b) kube-scheduler
c) kube-controller-manager
d) kubelet

How can you scale a Deployment named "web-app" to have four replicas?
a) kubectl scale deployment web-app --replicas=4
b) kubectl resize deployment web-app --replicas=4
c) kubectl update deployment web-app --replicas=4
d) kubectl apply -f web-app-deployment.yaml --replicas=4

What is the purpose of a Persistent Volume Claim (PVC) in Kubernetes?
a) To request storage from a Persistent Volume (PV)
b) To define storage classes for dynamic volume provisioning
c) To configure network policies for communication between Pods
d) To expose a Pod externally using a Service

Which Kubernetes resource is used to expose a set of Pods as a single, stable network endpoint?
a) Deployment
b) ReplicaSet
c) Service
d) Ingress

How can you enable RBAC (Role-Based Access Control) in a Kubernetes cluster?
a) By setting the --enable-rbac flag when starting the kube-apiserver
b) By configuring RBAC rules in the kube-apiserver configuration file
c) By creating a ClusterRole and binding it to a user or group
d) RBAC is enabled by default and cannot be disabled

Which tool can be used to monitor and collect metrics from a Kubernetes cluster?
a) Prometheus
b) Fluentd
c) Elasticsearch
d) Kibana

How can you upgrade a Kubernetes cluster using kubeadm?
a) kubeadm upgrade cluster
b) kubeadm upgrade apply
c) kubeadm upgrade node
d) kubeadm upgrade kubelet

What is the purpose of an Ingress controller in Kubernetes?
a) To manage and configure network policies for Pods
b) To provide load balancing and reverse proxy functionality
c) To monitor and collect metrics from the cluster
d) To manage and distribute container images

Which Kubernetes object is used to automatically provision and manage SSL/TLS certificates for Services?
a) Deployment
b) Ingress
c) ServiceAccount
d) ConfigMap

How can you view the logs of a specific Pod in Kubernetes?
a) kubectl get logs pod-name
b) kubectl logs pod-name
c) kubectl describe pod pod-name
d) kubectl exec pod-name logs