Introduction to Kubernetes and GKE
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The document provides an introduction to Kubernetes and Google Kubernetes Engine (GKE), highlighting key features, architecture, and concepts like pods, deployments, and services. It emphasizes Kubernetes' role in automating the deployment and management of containerized applications and discusses cloud infrastructure's evolution from virtual machines to container orchestration. Additionally, it introduces Helm as a package manager for Kubernetes, facilitating easier management of applications and configurations.
Introduction to Kubernetes and GKE
- 1. Jirayut Nimsaeng GDE Cloud Bangkok fb.me/winggundamth Introduction to Kubernetes and GKE
- 2. Jirayut Nimsaeng Speaker ● Founder & CEO, Opsta (Thailand) Co.,Ltd. ● GDE Cloud Bangkok ● DevSecOps Transformation Consultant
- 3. ● Cloud and Service Model ● Virtual Machine, Container and Docker ● What is Kubernetes? ● Kubernetes Architecture ● Google Kubernetes Engine (GKE) and Benefits ● Kubernetes Basic Concept Agenda
- 5. Cloud as a Service Model Future
- 6. Virtual Machine, Container, Docker VMs are an infrastructure level construct to turn one machine into many servers Containers are an app level construct
- 7. VM and Container Together
- 8. Build, Ship, Run Developers IT Operations BUILD Development Environments SHIP Secure Content & Collaboration RUN Deploy, Manage, Scale Registry Control plane Multi-container appsEngines running on servers in cloud or datacenter Images stored in repos Clients pull and push images
- 9. Docker on one server Node Container
- 11. ● Kubernetes, in Greek, means the Helmsman, or pilot of the ship ● It is pilot of a ship of containers ● Kubernetes is a software written in Go for automating deployment, scaling, and management of containerized applications ● Focus on manage applications, not machines ● Open source, open API container orchestrator ● Supports multiple cloud and bare-metal environments ● Inspired and informed by 15 years of Google’s experiences and internal systems What is Kubernetes?
- 12. ● Automatic bin packing ● Self-healing ● Horizontal manual/auto-scaling ● Service discovery & load balancing ● Automated rollouts and rollbacks ● Secret and configuration management ● Storage orchestration ● Batch execution Kubernetes Key Features
- 14. Google Kubernetes Engine (GKE) provides a managed environment for deploying, managing, and scaling your containerized applications using Google infrastructure. The GKE environment consists of multiple machines (specifically, Compute Engine instances) grouped together to form a cluster. Google Kubernetes Engine (GKE)
- 15. ● Single click / command to create high availability cluster ● Easy scaling ● Automatic scaling ● Easy upgrade ● Security Features ● Global load balancing ● Dashboard ● Logging and Monitoring Benefits of GKE
- 16. ● Manifest File ● Pod ● Deployment ● Service ● Ingress ● Namespace ● Rolling Update Kubernetes Basic Concept
- 17. apiVersion: v1 kind: Pod metadata: name: busybox namespace: default spec: containers: - name: busybox image: busybox command: - sleep - "3600" Kubernetes Manifest File This is what called Infrastructure as Code (IaC)
- 18. Pod ● Logical Application ○ One or more containers and volumes ○ Shared namespaces ○ One IP per pod Pod nginx application NFSiSCSIGCE 10.10.1.100
- 19. Deployment Drive current state towards desired state app: hello replicas: 1 Node1 Pod hello Node2 Node3 Node4
- 20. Deployment Drive current state towards desired state app: hello replicas: 3 Node1 Pod hello Node2 Node3 Node4
- 21. Deployment Drive current state towards desired state app: hello replicas: 3 Node1 Pod hello Node2 Pod hello Node3 Pod hello Node4
- 22. Deployment Drive current state towards desired state app: hello replicas: 3 Node1 Pod hello Node2 Pod hello Node3 Node4
- 23. Deployment Drive current state towards desired state app: hello replicas: 3 Node1 Pod hello Node2 Pod hello Node3 Node4 Pod hello
- 24. Deployment Drive current state towards desired state app: hello replicas: 3 Node1 Pod hello Node2 Pod hello Node3 Node4
- 25. Deployment Drive current state towards desired state app: hello replicas: 3 Node1 Pod hello Node2 Pod hello Node3 Node4 Pod hello
- 27. Service Type Devices Cloud Load Balancer with Public IP Node 3Node 2Node 1 Service A Type=LoadBalancer App A Pod 1 App A Pod 2 App A Pod 3 DB Pod 1 Port 31752 Port 31752 Port 31752 Port 80, 443 Service DB Type=ClusterIP
- 28. Ingress Devices Cloud Load Balancer with Public IP Node 3Node 2 Service B Type=ClusterIP Node 1 Service Ingress Type=LoadBalancer Ingress Controller Service A Type=ClusterIP App A Pod 1 App B Pod 1 App A Pod 2 App A Pod 3 App B Pod 2 App B Pod 3 Ingress Resource ● foo.com - Service A ● bar.com - Service B Port 31752 Port 31752 Port 31752 Port 80, 443
- 30. Rolling Update Node1 Node3Node2 ghost Pod app v1 Service ghost Pod app v1 Pod app v1
- 31. Rolling Update Node1 Node3Node2 ghost Pod app v1 Service ghost Pod app v1 Pod app v1 Pod app v2
- 32. Rolling Update Node1 Node3Node2 ghost Pod app v1 Service ghost Pod app v1 Pod app v1 Pod app v2
- 33. Rolling Update Node1 Node3Node2 ghost Pod app v1 Service ghost Pod app v1 Pod app v1 Pod app v2
- 34. Rolling Update Node1 Node3Node2 Service ghost Pod app v1 Pod app v1 Pod app v2
- 35. Rolling Update Node1 Node3Node2 Service ghost Pod app v1 Pod app v1 Pod app v2 Pod app v2
- 36. Rolling Update Node1 Node3Node2 Service Pod app v1 Pod app v2 Pod app v2
- 37. Rolling Update Node1 Node3Node2 Service Pod app v1 Pod app v2 Pod app v2 Pod app v2
- 38. Rolling Update Node1 Node3Node2 Service Pod app v2 Pod app v2 Pod app v2
- 39. ● ConfigMap ● Secret ● Job ● CronJob ● StatefulSet ● Persistent Volume There’s a lot to learn ● HealthCheck ● LimitResource ● NetworkPolicy ● AutoScaling ● Helm ● Operator
- 40. Jirayut Nimsaeng GDE Cloud Bangkok fb.me/winggundamth Q & A
- 41. Backup Slides
- 42. ● Application consists of: ○ Deployment ○ Service ○ Ingress ○ Configmap ○ Secret ○ Etc. ● More effort for operate and difficult control environment values ● Hard to manage release (Rollback, Rollout, History) ● Hard to reuse configuration template cause specification environment Problem with Manifest File
- 43. Helm is the package manager for Kubernetes Helm
- 44. ● Helm Charts helps you define, install, and upgrade ● Charts are easy to create, version, share, and publish ● Public Helm Charts are at https://hub.kubeapps.com Helm Charts