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Project description
Wuying GuestOS Observer Python
功能
- 记录埋点和Trace数据
- 埋点的数据格式是JSON对象,包含埋点名称(eventName)、时间(time)、属性(properties)和一些其它的配置信息,比如实例名称、版本等信息。
- Trace数据格式是JSON对象,包含TraceID、SpanID、ParentSpanID、Name、Kind、StartTime、EndTime、Duration、Attributes、Events、Links、StatusCode、StatusMessage等信息。以SLS Trace数据格式输出到本地文件, 通过定制opentelemetry-python的Exporter实现。
使用方法
- 创建一个Python项目,并安装OpenTelemetry SDK
- 使用示例可以参考demo.py
from observer import init, shutdown, new_span_as_current, new_track_point
if __name__ == "__main__":
# 初始化observer,指定trackpoint和trace文件存放目录,这里设置为当前路径,默认可不填,和C++、Golang版本保持一致
init("test", track_point_dir='./', trace_dir='./')
# 创建一个span,并设置属性和事件
with new_span_as_current("test_trace") as span:
# 设置属性
span.set_attribute("key", "value")
# 添加事件
span.add_event("event1", {"event_attr": "event_value"})
# 如果失败了,设置trace的状态和错误信息
span.set_status(get_status(False), "error message")
# 记录一个埋点
new_track_point("test_trace")
# 程序结束后关闭observer,这一步是可选的
shutdown()
如何使用远端的trace_id创建span
创建span时,可以指定trace_id和span_id,这样trace_id和span_id就会作为span的父span,从而实现链路追踪。这里在new_span_as_current和new_span方法中做了封装,可以直接传入trace_id和span_id,具体的实现可以参考wobs/observer.py。
with new_span_as_current("test_trace", trace_id="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", span_id="xxxxxxxxxxxxxxxx") as span:
span.set_attribute("key", "value")
依赖
- Opentelemetry python sdk
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