[GCP] Kubernetes Engine으로 배포 관리

4월 23일 완료 /

 

목표

• kubectl 도구 사용 연습
• 배포 yaml 파일 만들기
• 배포 시작, 업데이트 및 확장
• 배포 및 배포 스타일 업데이트 연습

 

진행

영역 설정

gcloud config set compute/zone

샘플 코드

gsutil -m cp -r gs://spls/gsp053/orchestrate-with-kubernetes .
cd orchestrate-with-kubernetes/kubernetes

gcloud container clusters create bootcamp \
  --machine-type e2-small \
  --num-nodes 3 \
  --scopes "https://www.googleapis.com/auth/projecthosting,storage-rw"

 

> 배포 객체에 관해 알아보기

kubectl explain deployment
kubectl explain deployment --recursive
kubectl explain deployment.metadata.name

 

> 배포 만들기

vi deployments/auth.yaml
i

...
containers:
- name: auth
  image: kelseyhightower/auth:1.0.0
...

:wq
cat deployments/auth.yaml

kubectl create -f deployments/auth.yaml
kubectl get deployments
kubectl get replicasets
kubectl get pods

kubectl create -f services/auth.yaml

kubectl create -f deployments/hello.yaml
kubectl create -f services/hello.yaml

kubectl create secret generic tls-certs --from-file tls/
kubectl create configmap nginx-frontend-conf --from-file=nginx/frontend.conf
kubectl create -f deployments/frontend.yaml
kubectl create -f services/frontend.yaml

kubectl get services frontend

curl -ks https://<EXTERNAL-IP>

curl -ks https://`kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"`

 

배포 확장
kubectl explain deployment.spec.replicas
kubectl scale deployment hello --replicas=5
kubectl get pods | grep hello- | wc -l
kubectl scale deployment hello --replicas=3
kubectl get pods | grep hello- | wc -l

 

> 순차적 업데이트

kubectl edit deployment hello

...
containers:
  image: kelseyhightower/hello:2.0.0
...

kubectl get replicaset
kubectl rollout history deployment/hello

kubectl rollout pause deployment/hello
kubectl rollout status deployment/hello
kubectl get pods -o jsonpath --template='{range .items[*]}{.metadata.name}{"\t"}{"\t"}{.spec.containers[0].image}{"\n"}{end}'

kubectl rollout resume deployment/hello
kubectl rollout status deployment/hello

kubectl rollout undo deployment/hello
kubectl rollout history deployment/hello
kubectl get pods -o jsonpath --template='{range .items[*]}{.metadata.name}{"\t"}{"\t"}{.spec.containers[0].image}{"\n"}{end}'

 

> Canary 배포

cat deployments/hello-canary.yaml
kubectl create -f deployments/hello-canary.yaml
kubectl get deployments

curl -ks https://`kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"`/version

 

> Blue/Green 배포

서비스
kubectl apply -f services/hello-blue.yaml

Blue/Green 배포를 사용하여 업데이트하기
kubectl create -f deployments/hello-green.yaml
curl -ks https://`kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"`/version
kubectl apply -f services/hello-green.yaml
curl -ks https://`kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"`/version

Blue/Green 롤백
kubectl apply -f services/hello-blue.yaml
curl -ks https://`kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"`/version

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Kubernetes Engine으로 배포 관리 완료!