HeadLiness類型的Service

apiVersion: v1
kind: Service
metadata:
  name: service-headliness
  namespace: dev
spec:
  selector:
    app: nginx-pod
  clusterIP: None # 將clusterIP設置為None，即可創建headliness Service
  type: ClusterIP
  ports:
  - port: 80    
    targetPort: 80

# 創建service
[root@master ~]# kubectl create -f service-headliness.yaml

# 獲取service， 發現CLUSTER-IP未分配
[root@master ~]# kubectl get svc service-headliness -n dev -o wide

# 查看service詳情
[root@master ~]# kubectl describe svc service-headliness -n dev

[root@master ~]# kubectl get pod -n dev
[root@master ~]# kubectl exec -it pc-deployment-7d7dd5499b-8ld77 -n dev -- cat /etc/resolv.conf

默認規則 service名稱.命名空間. svc.cluster.local

[root@master ~]# yum -y install bind-utils #產生dig工具
[root@master ~]# dig @10.96.0.10 service-headliness.dev.svc.cluster.local

注：也可用host命令來查看pod的真實ip
host service名稱

注：下圖中myheadless是service名字

黑馬B站k8s課程https://www.bilibili.com/video/BV1Qv41167ck/
https://gitee.com/yooome/golang/blob/main/k8s%E8%AF%A6%E7%BB%86%E6%95%99%E7%A8%8B-%E8%B0%83%E6%95%B4%E7%89%88/k8s%E8%AF%A6%E7%BB%86%E6%95%99%E7%A8%8B.md
https://www.yuque.com/fairy-era/yg511q/xyqxge