我正在使用grpc的开放跟踪python库,并试图在此处构建示例脚本:https://github.com/opentracing-contrib/python-grpc/blob/master/示例/琐事/trivial_client.py。
通过截断的频道发送请求后,如何找到请求的跟踪ID值?我想用它来查看Jaeger UI中的追踪数据。
我错过了一个关键文档。为了获得跟踪ID,您必须在客户端创建一个跨度。此跨度将具有可用于检查Jaeger UI中数据的跟踪ID。必须通过ActiveSpanSource
实例将跨度添加到GRPC消息中。
# opentracing-related imports
from grpc_opentracing import open_tracing_client_interceptor, ActiveSpanSource
from grpc_opentracing.grpcext import intercept_channel
from jaeger_client import Config
# dummy class to hold span data for passing into GRPC channel
class FixedActiveSpanSource(ActiveSpanSource):
def __init__(self):
self.active_span = None
def get_active_span(self):
return self.active_span
config = Config(
config={
'sampler': {
'type': 'const',
'param': 1,
},
'logging': True,
},
service_name='foo')
tracer = config.initialize_tracer()
# ...
# In the method where GRPC requests are sent
# ...
active_span_source = FixedActiveSpanSource()
tracer_interceptor = open_tracing_client_interceptor(
tracer,
log_payloads=True,
active_span_source=active_span_source)
with tracer.start_span('span-foo') as span:
print(f"Created span: trace_id:{span.trace_id:x}, span_id:{span.span_id:x}, parent_id:{span.parent_id}, flags:{span.flags:x}")
# provide the span to the GRPC interceptor here
active_span_source.active_span = span
with grpc.insecure_channel(...) as channel:
channel = intercept_channel(channel, tracer_interceptor)
当然,您可以切换with
语句的排序,以便在GRPC通道之后创建跨度。那部分没有任何区别。
如果我错了,请纠正我。如果您是说如何在服务器端找到跟踪ID,则可以尝试通过get_active_span访问opentracing跨度。我想,痕迹ID应该是其中的标签之一。