AWS에서 Kubernetes 실전 활용하기

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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!

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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

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© 2018, Amazon Web 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