Kubernetes for .NET Developers - NDC Sydney 2018

Have you started building containerized application and struggled with scaling across multiple hosts? Would you like to simplify DevOps tasks such as deployment and configuration? Have you heard about Kubernetes and would like to learn more?… then this presentation is for you!

Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.

In this presentation, I will walk you through Kubernetes fundamentals, the high level architecture, how would you deploy an ASP.NET Core application to Kubernetes and finally how would you configure and launch auto-scaling, self-healing Kubernetes cluster.

Transcript

1. Kubernetes for .NET Developers Hossam Barakat Senior Consultant at Readify @hossambarakat_ | www.hossambarakat.net
2. @hossambarakat_ • What is Kubernetes? • Why Kubernetes? • Kubernetes Architecture • Kubernetes Building Blocks Agenda
3. @hossambarakat_ Containers Hardware Host Operating System Application Application Application Container Dependencies Application Host Operating System Hardware Container Engine Container Container Container Container Hardware Host Operating System Virtual Machine Guest OS Application Virtual Machine Guest OS Application Hypervisor
4. @hossambarakat_ What is Docker?
5. @hossambarakat_ The application is deployed to production
6. @hossambarakat_ Then the application went viral
7. @hossambarakat_ Containers bring scalability challenges!
8. @hossambarakat_ Container orchestration platforms to rescue
9. @hossambarakat_ • Service discovery • Scaling • Health monitoring • Failover • Networking • Scheduling • Coordinated app upgrades Container Orchestration
10. @hossambarakat_ Kubernetes
11. @hossambarakat_ • Self-healing • Horizontal scaling • Service discovery and load balancing • Automated rollouts and rollbacks • Secret and configuration management • Storage orchestration • Automatic binpacking • Batch execution Why Kubernetes?
12. @hossambarakat_ Kubernetes Architecture Master Worker Worker Client Worker Cluster
13. @hossambarakat_ Kubernetes Architecture Master API Server Controller Manager Scheduler Worker Kubelet Container Runtime UI (Dashboard) CLI (Kubectl) Other Client(s) Container Container Cluster
14. @hossambarakat_ • Localhost installation (Minikube, Docker For Desktop) • On-Premise Installation (VMs, Bare Metal) • Cloud (Google, Azure, AWS,…) Installing Kubernetes
15. @hossambarakat_ ASP.NET App On Kubernetes ASP.NET Application
16. @hossambarakat_ ASP.NET App On Kubernetes ASP.NET Application ASP.NET Application ASP.NET Application
17. @hossambarakat_ Pods
18. @hossambarakat_ Pods Pod
19. @hossambarakat_ Pods Scaling Pod Pod
20. @hossambarakat_
21. @hossambarakat_ But wait… what happens if the pod dies?
22. @hossambarakat_ ReplicaSets Pod ReplicaSet Pod
23. @hossambarakat_ ReplicaSets Master Worker 1 Worker 2 Pod 1 Pod 2 Worker 3 Pod 2
24. @hossambarakat_ Labels Pod
25. @hossambarakat_
26. @hossambarakat_ Deployment ReplicaSet Deployment Pod Pod
27. @hossambarakat_ Deployment Rollout Deployment ReplicaSet V2 Pod Pod ReplicaSet V1 Pod Pod
28. @hossambarakat_
29. @hossambarakat_ Connecting to Pods 10.0.0.1 DB Pod A 10.0.0.2 DB Pod B ASP.NET Pod
30. @hossambarakat_ Service 10.0.0.2 Pod B 10.0.0.3 Pod C IP: 10.0.0.30 DNS: myservice Service 10.0.0.1 Pod A
31. @hossambarakat_ Service 10.0.0.1 DB Pod A ASP.NET Pod IP: 10.0.0.30 DNS: myservice Service
32. @hossambarakat_ Service IP: 10.0.0.30 DNS: tasks-app-svc Service IP: 10.0.0.90 DNS: mssql-service Service 10.0.0.1 Pod 10.0.0.1 Pod 10.0.0.1 Pod
33. @hossambarakat_
34. @hossambarakat_ Persistent Volume
35. @hossambarakat_ Persistent Volume
36. @hossambarakat_ Persistent Volume
37. @hossambarakat_
38. @hossambarakat_ Kubernetes in the cloud
39. Azure AKS $ az aks create -g myResourceGroup -n myCluster --generate-ssh-keys $ az aks get-credentials -g myResourceGroup -n myCluster $ kubectl get nodes $ az aks scale -g myResourceGroup -n myCluster --node-count 6
40. @hossambarakat_ • Scale agent nodes based on pending pods and nodes utilization • Scans the cluster periodically to check for pending pods or empty nodes and increases the size if possible AKS Cluster Autoscaler
41. @hossambarakat_ • Kubernetes Architecture • Deploy application using different workloads • Kubernetes in the cloud Summary
42. @hossambarakat_ • https://www.hossambarakat.net • https://github.com/hossambarakat/TaskList • Introduction to Kubernetes (edX) • Learn Kubernetes using Interactive Hands-on Scenarios (Katacoda) • https://kubernetes.io/docs/ Resources
43. @hossambarakat_ Questions?
44. Thanks Hossam Barakat @hossambarakat_ www.hossambarakat.net