My CoreDNS pod get red status and show this error:

Readiness probe failed: Get http://172.30.224.3:8080/health: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

now I copy the url to request from k8s's host:

[root@ops001 work]# curl http://172.30.224.3:8080/health
OK

This is my probe config:

           "readinessProbe": {
              "httpGet": {
                "path": "/health",
                "port": 8080,
                "scheme": "HTTP"
              },
              "timeoutSeconds": 1,
              "periodSeconds": 10,
              "successThreshold": 1,
              "failureThreshold": 3
            }

The question is: why the server return successs and kubernetes dashboard give error tips and not refresh?

This is the command output:

$ kubectl get pods -n kube-system
NAME                                  READY   STATUS    RESTARTS   AGE
coredns-df554df8-76lrw                1/1     Running   1          29h
kubernetes-dashboard-6466b68b-z6z78   1/1     Running   0          16d
traefik-ingress-controller-hx4xd      1/1     Running   0          29d