Service labels don't work without node info

[raiderx]

Is it correct that Server.go at lines 307 & 669 ignores additional service labels if NodeInfo is null?

I have service external-service-green that I want to monitor. I added additional label "appName", DFSL returns this label to DFM, but DFM ignores it.

2019/02/09 18:59:26 Processing: [
{"distribute":"true","port":"9090","replicas":"1","serviceDomain":"192.168.12.130","serviceName":"monitor_monitor","servicePath":"/monitor"},
{"distribute":"true","port":"3000","replicas":"1","reqPathSearch":"/grafana","serviceName":"monitor_grafana","servicePath":"/grafana/,/grafana/public,/grafana/api"},
{"appName":"external-service","distribute":"true","metricsPath":"/external-service/metrics","replicas":"1","scrapePort":"8080","serviceName":"external-service-green"}
]

I don't see label appName for target external-service-green:

global:
  scrape_interval: 10s
  scrape_timeout: 10s
  evaluation_interval: 1m
scrape_configs:
- job_name: external-service-green
  scrape_interval: 10s
  scrape_timeout: 10s
  metrics_path: /external-service/metrics
  scheme: http
  dns_sd_configs:
  - names:
    - tasks.external-service-green
    refresh_interval: 30s
    type: A
    port: 8080