How to deregister a service via Kubernetes nodeport service?

Consul
1

I deployed a consul cluster with 3 pod in k8s and create a nodeport service to forward port 8500 t0 30850.
I register a service to pod 1.When I request endpoint http://ip:30850/v1/agent/deregister/serviceid, it may requests to a pod2 or pod3 that does not have the target serviceid. So I want to know, how can I deregister a service via a nodeport instead of pod ip.

Here is my k8s yaml.

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: register-center
  namespace: consul
spec:
  serviceName: register-center
  replicas: 3
  selector:
    matchLabels:
      app: register-center
  template:
    metadata:
      labels:
        app: register-center
      annotations:
        network/subnet: iaas.default
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: register-center
        image: consul:1.15
        args:
             - "agent"
             - "-server"
             - "-bootstrap-expect=3"
             - "-ui"
             - "-data-dir=/consul/data"
             - "-bind=0.0.0.0"
             - "-client=0.0.0.0"
             - "-advertise=$(PODIP)"
             - "-retry-join=register-center-0.register-center.$(NAMESPACE).svc.cluster.local"
             - "-retry-join=register-center-1.register-center.$(NAMESPACE).svc.cluster.local"
             - "-retry-join=register-center-2.register-center.$(NAMESPACE).svc.cluster.local"
             - "-domain=cluster.local"
             - "-disable-host-node-id"
             - "-enable-script-checks=true"
        env:
            - name: PODIP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            - name: NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
        ports:
            - containerPort: 8500
              name: ui-port
            - containerPort: 8443
              name: https-port
---
apiVersion: v1
kind: Service
metadata:
  name: register-center-nodeport
  namespace: consul
  labels:
    name: register-center
spec:
  type: NodePort
  ports:
    - name: http
      port: 8500
      targetPort: 8500
      nodePort: 30850
    - name: https
      port: 8443
      targetPort: 8443
  selector:
    app: register-center