1. Create deployment manifests and deploy to the cluster

Connect to the lab GKE cluster

환경 변수 설정

export my_zone=us-central1-a
export my_cluster=standard-cluster-1

설정 반영

source <(kubectl completion bash)

클러스터 구성

gcloud container clusters get-credentials $my_cluster --zone $my_zone

OUTPUT

Fetching cluster endpoint and auth data.
kubeconfig entry generated for standard-cluster-1.

Repository 복제

git clone https://github.com/GoogleCloudPlatform/training-data-analyst

심볼릭 링크

ln -s ~/training-data-analyst/courses/ak8s/v1.1 ~/ak8s

ak8s 디렉토리로 이동

cd ~/ak8s/Deployments/

Create a deployment manifest

nginx-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80

kubectl apply

kubectl apply -f ./nginx-deployment.yaml

kubectl get deployments

Output

NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-deployment   3/3     3            3           11s

2. Manually scale up and down the number of Pods in deployments

끄고 싶을 때가 있음..

Scale Pods up and down in the console

☰ > Kubernetes Engine > Workloads.

Scale Pods up and down in the shell

replicas 갯수 커맨드로 늘이기

현재 deployments보기

kubectl get deployments

Output

NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-deployment   1/1     1            1           4m24s

replicas 3개로 늘이기

kubectl scale --replicas=3 deployment nginx-deployment

결과

$kubectl get deployments
NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-deployment   3/3     3            3           4m53s

3. Trigger a deployment rollout and a deployment rollback

Trigger a deployment rollout

$kubectl set image deployment.v1.apps/nginx-deployment nginx=nginx:1.9.1 --record

Flag --record has been deprecated, --record will be removed in the future
deployment.apps/nginx-deployment image updated

To view the rollout status, execute the following command:

kubectl rollout status deployment.v1.apps/nginx-deployment

확인

kubectl get deployments

rollout history 보기

kubectl rollout history deployment nginx-deploymentkubectl rollout history deployment nginx-deployment

Output

deployment.apps/nginx-deployment
REVISION  CHANGE-CAUSE
1         <none>
2         kubectl set image deployment.v1.apps/nginx-deployment nginx=nginx:1.9.1 --record=true

최신 배포판 상세 보기

$kubectl rollout history deployment/nginx-deployment --revision=3

4. Define the service type in the manifest

메니패스트에서 버시스 유형 정의

yaml

apiVersion: v1
kind: Service
metadata:
  name: nginx
spec:
  type: LoadBalancer
  selector:
    app: nginx
  ports:
  - protocol: TCP
    port: 60000
    targetPort: 80
    

로드 반렌스 확인

$kubectl get service nginx

NAME    TYPE           CLUSTER-IP    EXTERNAL-IP   PORT(S)           AGE
nginx   LoadBalancer   10.12.7.221   <pending>     60000:30953/TCP   28s

5. 배포

yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-canary
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
        track: canary
        Version: 1.9.1
    spec:
      containers:
      - name: nginx
        image: nginx:1.9.1
        ports:
        - containerPort: 80

kubectl

kubectl apply -f nginx-canary.yaml

kubectl get deployments
NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-canary       1/1     1            1           38s
nginx-deployment   3/3     3            3           14m

replicas 0으로 줄이기

kubectl scale --replicas=0 deployment nginx-deployment

NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-canary       1/1     1            1           84s
nginx-deployment   0/0     0            0           15m