SkyWalking Agent Ignore 设置
背景
SkyWalking agent 会采集所有支持的数据,但平台或技术框架本身存在的 health check、heartbeat、定期轮询 等机制会产生大量无意义数据,这个采样点需要进行忽略。
以Spring Cloud 举几个例子:
- 服务向注册中心发送“心跳”、定期获取注册的服务列表等,
/eureka/**
均可忽略 - 应用健康检查机制,如
/health
接口 - 数据库维持连接机制,如MySQL 定期执行
select 1
- Spring Cloud 本身大量的MQ通讯
- 向配置中心定期拉取配置
使用方式
忽略指定后缀
Java Agent 提供了标准的 agent.ignore_suffix
配置,可忽略特定后缀的采样。
例如以环境变量配置的方式忽略 health
结尾的Endpoint,多项配置间以逗号隔开
SW_AGENT_IGNORE_SUFFIX: health
匹配 Ant Path 规则
可选插件 apm-trace-ignore-plugin 提供了更灵活的配置,支持 Ant Path
规则,如:/path/*
、/path/**
、/path/?
。
使用方式
将 apm-trace-ignore-plugin-x.jar
包从 /agent/optional-plugins/apm-trace-ignore-plugin
移动到 /agent/plugins
即可。
以忽略 eureka
为例,配置JVM参数,多项配置以逗号分隔:
-Dskywalking.trace.ignore_path=/eureka/**
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