K8S探针

https://blog.csdn.net/weixin_28820113/article/details/148380309

HTTP探测实战（最常用）

向容器发送 HTTP 请求，若返回状态码为 200-399，则表示检查成功

[root@master ~/probe]# cat readiness.yaml
kind: Pod
apiVersion: v1
metadata:name: nginxlabels:app: nginx
spec:containers:- name: nginximage: nginxreadinessProbe:httpGet:# http请求的端口port: 80# http请求的路径path: /# http请求的主机# host: 127.0.0.1# 请求方式scheme: HTTP# 超时时间，指定5秒timeoutSeconds: 5# 探针检查成功后，需要连续3次检查失败才认为容器出现问题failureThreshold: 3# 探针检查失败后，需要连续1次检查成功才认为容器恢复正常successThreshold: 1# 探针检查的执行间隔时间，指定3秒periodSeconds: 3# 容器启动后等待15秒再开始执行探针检查initialDelaySeconds: 15[root@master ~/probe]# kubectl apply -f readiness.yaml
pod/nginx created

 

创建service

[root@master ~/probe]# cat service.yaml
apiVersion: v1
kind: Service
metadata:name: nginx-service
spec:type: ClusterIPselector:# 选择标签为 app: nginx 的 Podapp: nginxports:- name: httpprotocol: TCP# Service的端口port: 80# Pod 上的端口targetPort: 80
[root@master ~/probe]# kubectl apply -f service.yaml
service/nginx-service created

检查Pod、Service、EndPoint资源，发现EndPoint关联的是Pod的IP，符合预期

[root@master ~/probe]# kubectl get po,svc,ep -o wide
NAME        READY   STATUS    RESTARTS   AGE    IP               NODE     NOMINATED NODE   READINESS GATES
pod/nginx   1/1     Running   0          4m2s   100.95.185.232   node02   <none>           <none>NAME                    TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE    SELECTOR
service/nginx-service   ClusterIP   10.96.1.43   <none>        80/TCP    112s   app=nginxNAME                      ENDPOINTS           AGE
endpoints/nginx-service   100.95.185.232:80   112s