一、编写dockfile

FROM openjdk:11
ADD *.jar app
CMD java -jar app --server.port=8088

二、制作镜像（记得最后加 . ）

docker build -f dockerfile地址 -t 新镜像名字:TAG .

三、推送到自己的阿里云镜像仓库

docker pull registry.cn-hangzhou.aliyuncs.com/jbhub/helloword:[镜像版本号]

四、制作k8s部署deployment

使用命令行导出一个模板

kubectl create deployment hello-k8s --image=registry.cn-hangzhou.aliyuncs.com/jbhub/helloword:v1.0 --dry-run -o yaml > deployment.yaml

长成这样

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: hello-k8s
  name: hello-k8s
spec:
  replicas: 2
  selector:
    matchLabels:
      app: hello-k8s
  template:
    metadata:
      labels:
        app: hello-k8s
    spec:
      containers:
      - image: registry.cn-hangzhou.aliyuncs.com/jbhub/helloword:v1.0
        name: helloword

五、然后做一次部署

kubectl apply -f deployment.yaml

部署后查看一下deployment是否已经成功

kubectl get deployment

看是否有pod

kubectl get pods

六、暴露deployment端口给外部访问，并根据deployment去生成service对应的yaml

kubectl expose deployment hello-k8s --port=80 --target-port=8088 --type=NodePort --dry-run -o yaml > service.yaml

其中hello-k8s是deployment的名字，target-port是java应用的端口，具体长成下面这样

apiVersion: v1
kind: Service
metadata:
  labels:
    app: hello-k8s
  name: hello-k8s
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 8088
  selector:
    app: hello-k8s
  type: NodePort

七、通过以下方法可以查看现有pod、deployment、svc的yaml

kubectl get pod hello-k8s-88df5bf95-94hql -o yaml
kubectl get svc hello-k8s -o yaml