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AWS에서 Kubernetes 실전 활용하기::유병우::AWS Summit Seoul 2018
This document discusses Kubernetes in action on AWS. It begins with an introduction to container orchestration tools and why Kubernetes was chosen. It then provides definitions of key Kubernetes concepts like clusters, nodes, pods, replication controllers, deployments and services. Reasons why Kubernetes is useful like automatic binpacking, horizontal scaling, automated rollouts/rollbacks, self-healing and service discovery are covered. The document also discusses why Kops is useful to automate management of Kubernetes clusters on AWS. It concludes with a demo of setting up a Kubernetes cluster on AWS with Kops including deploying a web app, Nginx proxy, external load balancer and auto scaling configurations.
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AWS에서 Kubernetes 실전 활용하기::유병우::AWS Summit Seoul 2018
- 1. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. 유병우 Buzzvil Kubernetes in Action on AWS
- 2. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Container orchestration tool? Why Kubernetes? Why Kops? Demo
- 3. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Container orchestration tool?
- 4. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Container? • State? • Relation? • History?
- 5. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Container? - Relation 격리된 공간가상화 Overhead
- 6. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Container? - History # Use an official Python runtime as a parent image FROM python:2.7-slim # Set the working directory to /app WORKDIR /app # Copy the current directory contents into the container at /app ADD . /app # Install any needed packages specified in requirements.txt RUN pip install --trusted-host pypi.python.org -r requirements.txt # Make port 80 available to the world outside this container EXPOSE 80
- 7. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Container orchestration tool? EC2 Django EC2 Django EC2 Django EC2 Go EC2 Go EC2 Go 2 Apps + 2 AS Groups + 1 ALB Docker 도입 Django Go Application load balancer Nginx 3 Apps + 1 AS Groups Container orchestration tool 을 통해 이걸 해결해보자!
- 8. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Kubernetes?
- 9. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. 용어정리
- 10. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Cluster Cluster / Node / Pod
- 11. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. RC / Deployment / Service • ReplicationController (ReplicaSet) • 하나의 Pod 상태를 공유하는 Set • Deployment? • 업데이트! (RC 가 추가됨) • 어떻게 배포할지 설정 가능 How to expose them? Service
- 12. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Kubernetes? • Automatic binpacking • Horizontal scaling • Automated rollouts and rollbacks • Self-healing • Service discovery and load balancing
- 13. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automatic binpacking
- 14. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automatic binpacking Node 1 (4 CPU / 8G) 2 CPU / 2G Node 2 (4 CPU / 8G) 2 CPU / 2G 2 CPU / 2G1 CPU / 2G
- 15. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automatic binpacking Node 1 (4 CPU / 8G) 2 CPU / 2G Node 2 (4 CPU / 8G) 2 CPU / 2G 2 CPU / 2G1 CPU / 2G
- 16. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automatic binpacking Node 1 (4 CPU / 8G) 2 CPU / 2G 1 CPU / 2G Node 2 (4 CPU / 8G) 2 CPU / 2G 2 CPU / 2G1 CPU / 2G
- 17. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automatic binpacking Node 1 (4 CPU / 8G) 2 CPU / 2G Node 2 (4 CPU / 8G) 2 CPU / 2G 2 CPU / 2G1 CPU / 2G 1 CPU / 2G
- 18. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automatic binpacking 2 CPU / 16G 2 CPU / 4G 4 CPU / 8G 2 CPU / 2G 1 CPU / 2G 2 CPU / 16G 1 CPU / 4G 1 CPU / 8G 4 CPU / 8G 2 CPU / 2G 1 CPU / 2G 2 CPU / 16G 1 CPU / 4G 1 CPU / 8G 4 CPU / 8G 2 CPU / 2G 1 CPU / 2G 2 CPU / 16G 1 CPU / 6G 1 CPU / 2G 4 CPU / 8G 2 CPU / 2G 1 CPU / 2G 3 CPU / 4G 1 CPU / 8G
- 19. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Horizontal scaling
- 20. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Horizontal scaling
- 21. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automated rollouts and rollbacks
- 22. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automated rollouts and rollbacks https://kubernetes.io/docs/tutorials/kubernetes-basics/update-intro/
- 23. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Automated rollouts and rollbacks
- 24. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Self-healing
- 25. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Self-healing Node 1 App 1 App 2 Node 2 App 2 Node 3 App 3 Master Contoller Scheduler
- 26. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Self-healing Node 1 App 1 App 2 Node 2 App 2 Node 3 App 3’ Master Contoller Scheduler
- 27. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Self-healing Node 1 App 1 App 2 Node 2 App 2 Node 3 App 3 Master Contoller Scheduler
- 28. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Self-healing Node 1 App 1 App 2 Node 2 App 2 App 3 Master Contoller Scheduler
- 29. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Service discovery and load balancing
- 30. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Service discovery and load balancing {{service-name}}.{{namespace}}.svc.cluster.local
- 31. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Service discovery and load balancing • Internal • ClusterIP • External • LoadBalancer • NodePort
- 32. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why Kops?
- 33. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why kops? • AWS 위에 Kubernetes clusters 관리를 자동화 AWS AWS Kube
- 34. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Kube + α Why kops? • AWS 위에 Kubernetes clusters 관리를 자동화 S3 IAM VPC EC2 Route53
- 35. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why kops? • AWS 위에 Kubernetes clusters 관리를 자동화 • 고가용성(Highly Available) Kubernetes Masters
- 36. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Why kops? • AWS 위에 Kubernetes clusters 관리를 자동화 • 고가용성(Highly Available) Kubernetes Masters • State-sync model (dry-runs & Idempotency) • kops create cluster --zones us-west-2a ${NAME} • kops update cluster ${NAME} --yes
- 37. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Demo
- 38. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Prerequisites • Install CLI tools – kops / kubectl • IAM permissions
- 39. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Demo • Cluster 구성 (1 master & 2 nodes) • Web app & Nginx proxy 구성 • External load balancer 구성 • Auto scaling 설정
- 40. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. VPC Overview Cluster Load balancer hello-go Pod Pod Pod Pod autoscaler Nginx Pod Cluster autoscaler
- 41. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. VPC Cluster 구성 Cluster Master Node Node
- 42. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Cluster 구성 • 환경변수 설정 • export AWS_ACCESS_KEY_ID=$(aws configure get aws_access_key_id) • export AWS_SECRET_ACCESS_KEY=$(aws configure get aws_secret_access_key) • export S3_BUCKET_NAME=k8s-state-test-honeyscreen-com • export KOPS_STATE_STORE=s3://${S3_BUCKET_NAME} • export CLUSTER_NAME=k8s-test.honeyscreen.com • export SSH_PUBLIC_KEY=~/.ssh/id_rsa.pub • export VPC={{VPC-ID}} • export CLUZTER_REGION=ap-northeast-2 • export CLUSTER_ZONE=${CLUZTER_REGION}a
- 43. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Cluster 구성 • S3 Bucket 만들기 / Cluster 생성
- 44. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Cluster 구성 • Cluster 확인 및 수정
- 45. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Cluster 구성 • Cluster 적용 • kops update cluster --name $CLUSTER_NAME –yes • Cluster 업데이트 • kops edit instancegroup nodes • kops update cluster --name $CLUSTER_NAME –yes
- 46. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Cluster 구성 • Dashboard 설치 • kubectl create -f https://raw.githubusercontent.com/kubernetes/kops/master/addons/kubernetes- dashboard/v1.8.1.yaml • http://api.k8s-test.honeyscreen.com/ui
- 47. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. VPC Web app & Nginx proxy 구성 Cluster hello-go Pod Pod Pod Nginx Pod
- 48. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app & Nginx proxy 구성 • Web app - hello-go • Source code • Return Git revision • Build • kube/app-hello-go.yaml • kube/svc-hello-go.yaml • Nginx proxy • kube/app-nginx.yaml • kube/svc-nginx.yaml
- 49. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app - hello-go • main.go
- 50. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app – build-docker.sh • hello
- 51. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app – kube/app-hello-go.yaml
- 52. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app – kube/svc-hello-go.yaml
- 53. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app – kube/app-nginx.yaml
- 54. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. VPC External load balancer 구성 Cluster Load balancer hello-go Pod Pod Pod Nginx Pod
- 55. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Web app – kube/svc-nginx.yaml
- 56. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. External load balancer 구성 • Expose Nginx to Load balancer • kube/svc-nginx.yaml • Load balancer 확인 • Route53 에서 sub domain 할당
- 57. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. deploy.sh
- 58. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. VPC Auto scaling 설정 Cluster Load balancer hello-go Pod Pod Pod Pod autoscaler Nginx Pod Cluster autoscaler
- 59. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Auto scaling - Pod • kube/hpa-hello-go.yaml
- 60. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Auto scaling - Cluster • kube/app-autoscaler.yaml
- 61. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Increase load
- 62. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Increase load
- 63. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Decrease load
- 64. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. Decrease load
- 65. © 2018, AmazonWeb Services, Inc. or Its Affiliates. All rights reserved. References • Github https://github.com/urunimi/kube-sample/ • E-mail hovan@hovans.com ben.yoo@buzzvil.com We are hiring!
- 66.