k8s service

1.为什么需要k8s service

如果你需要一个稳定ip地址用于Pod间做交互，例如Eureka、Mysql，那么你需要使用k8s service

2.k8s service的类型

kubectl expose -help
–type=’’: Type for this service: ClusterIP, NodePort, LoadBalancer, or ExternalName. Default is ‘ClusterIP’.

2.1ClusterIP类型只能集群内部使用，外部无法访问

2.2NodePort端口绑定再集群的每一个node节点上供外部访问

2.3LoadBalancer需要配置云服务商使用

3.如何创建pod

3.1通过kubectl expose 命令创建
demo

# Create a service for a replicated nginx, which serves on port 80 and connects to the containers on port 8000.
kubectl expose rc nginx --port=80 --target-port=8000

3.2通过yaml文件创建

vim eureka-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: eureka-1
  labels:
    app: eureka-1
spec:
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: eureka-1