request has no response when visit nodePort service - kubernetes

Question

I deployment a kubernetes cluster with 5 nodes: matser worker1 worker2 worker3 worker4.
And I create a deployment with 1 replica, it was arranged on worker4, expose port 7777
create a service:
apiVersion: v1
kind: Service
metadata:
name: service-test
spec:
type: NodePort
selector:
app: app
ports:
- name: http
protocol: TCP
port: 80
targetPort: 7777
nodePort: 31000
After create service, I send a request to worker4:31000/test ,it responses immediately.
But when I request other nodes on 31000, such as master:31100/test , worker1:31100/test. It has no response, and sometime it will response, but it cost such a long time.
when I use lsof to show port usage, it different
[root#worker4 ~]# lsof -i:31000
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
wrapper 5251 root 5u IPv4 33957 0t0 TCP localhost:32000->localhost:31000 (ESTABLISHED)
java 5355 root 13u IPv6 35851 0t0 TCP localhost:31000->localhost:32000 (ESTABLISHED)
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
kube-prox 9679 root 13u IPv6 3746350 0t0 TCP *:31000 (LISTEN)
so how can I visit nodePort service on other nodes.

Answer 1

Nodeport goes through extra network hop and uses IP table load balancing at L4 layer provided by kube proxy.So it's expected to be slow particularly if you access a pod from a a node where it's not scheduled. Also kube proxy need to be running in nodes from where you want to access a pod via nodeport service.
I would suggest to use a reverse proxy such as nginx as ingress or L7 load balancer for faster performance.