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https://ambari.apache.org/docs/2.7.9/ambari-design/metrics/
Metrics
Ambari Metrics System ("AMS") is a system for collecting, aggregating and serving Hadoop and system metrics in Ambari-managed clusters
https://ambari.apache.org/zh-Hans/docs/3.1.0/ambari-design/blueprints/blueprint-ha
x 示例。相关服务定义包括 BIGTOP 资源中的 HDFS NameNode、YARN ResourceManager 和 HBase Master/RegionServer 组件。
HDFS NameNode HA
主机相关属性应使用主机组替换。稳定格式为 %HOSTGROUP::HOST_GROUP_NAME%:PORT；Blueprint
https://ambari.apache.org/zh-Hans/docs/3.0.0/ambari-design/service-dashboard/
json 文件中映射到的路径。指标值会通过 Ambari API 的服务组件或主机组件 endpoint，在相同路径的 metrics 属性中暴露。
metrics/service_name： 发出指标的组件所属服务名称。
values/name： 此字段仅用于 Graph widget 类型，在 Graph widget