# add meta informations
curl -X PUT -d '{"id": "db004-hf","name": "node","address": "172.16.168.15","port": 9101,"tags": ["nodes","hf004"],"meta":{"idc":"hf"},"checks": [{"http": "http://172.16.168.15:9101/metrics", "interval": "5s"}]}'  http://172.16.168.10:8500/v1/agent/service/register

scrape_configs:
- job_name: 'consul-node'
  consul_sd_configs:
  - server: '172.16.168.10:8500'
    tags:
    - "nodes"
    refresh_interval: 3s
  relabel_configs:
    - source_labels: [__meta_consul_tags]
      regex: .*hf004.*
      action: keep
    - regex: __meta_consul_service_metadata_(.+)
      action: labelmap

After restarting Prometheus, you can see that the label is automatically marked.