$ cat service-agent.yaml 
apiVersion: v1
kind: Service
metadata:
  labels:
    app: zabbix
  name: zabbix-agent
  namespace: zabbix 
spec:
  ports:
  - name: zabbix-agent
    port: 10050
    protocol: TCP
    targetPort: 10050
  selector:
    app: zabbix
  type: ClusterIP