Grafana Node Graph 使用教程

Grafana 可以显示图数据，例：

依赖

• Grafana >= 7.5.0
  下载地址 https://grafana.com/grafana/download

# 启动 Grafana
$ ./grafana-sever

• Grafana Node Graph API Plugin

# 安装插件
$ grafana-cli plugins install hamedkarbasi93-nodegraphapi-datasource
# 重新启动 Grafana
$ grafana-server

步骤

（1）Grafana 添加数据源，选择 Node Graph API

填写 Node Graph API URL，如 http://localhost:9999

注：$URL 需要提供三个 API

• $URL/api/heatlh 健康检查接口
  • method: GET
  • 返回 HTTP CODE 200 即可
• $URL/api/graph/fields 图节点与边涉及的字段接口
  • method: GET
  • content type: application/json
  • response body example:

    {"edges_fields": [{"field_name": "id","type": "string"},{"field_name": "source","type": "string"},{"field_name": "target","type": "string"},{"field_name": "mainStat","type": "number"}],"nodes_fields": [{"field_name": "id","type": "string"},{"field_name": "title","type": "string"},{"field_name": "mainStat","type": "string"},{"field_name": "secondaryStat","type": "number"},{"color": "red","field_name": "arc__failed","type": "number"},{"color": "green","field_name": "arc__passed","type": "number"},{"displayName": "Role","field_name": "detail__role","type": "string"}]
    }
    

• $URL/api/graph/data 图节点与与边关系数据接口
  • method: GET
  • content type: application/json
  • response body example:

    {"edges": [{"id": "1","mainStat": "53/s","source": "1","target": "2"}],"nodes": [{"arc__failed": 0.7,"arc__passed": 0.3,"detail__zone": "load","id": "1","subTitle": "instance:#2","title": "Service1"},{"arc__failed": 0.5,"arc__passed": 0.5,"detail__zone": "transform","id": "2","subTitle": "instance:#3","title": "Service2"}]
    }
    

（2）Grafana 新建 Panel，选择 Node Graph

选择对应的 Data Source 为刚刚添加的数据源

（3）得到图

参考

• https://grafana.com/docs/grafana/latest/panels-visualizations/visualizations/node-graph/ Grafana Node Graph Panel
• https://grafana.com/grafana/plugins/hamedkarbasi93-nodegraphapi-datasource/ Grafana Node Graph API

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