我正在使用GRPC的Open Tracing Python库,并尝试在以下示例脚本的基础上构建:https://github.com/opentracing-contrib/python-grpc/blob/master/examples/trivial/trivial_client.py。
一旦我通过侦听通道发送了请求,如何找到请求的trace-id值?我想用它来查看Jaeger UI中的跟踪数据。
答案 0 :(得分:1)
我错过了关键文件。为了获得跟踪ID,您必须在客户端上创建一个跨度。该范围将具有可用于检查Jaeger UI中的数据的跟踪ID。跨度必须通过ActiveSpanSource
实例添加到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
语句的顺序,以便在GRPC通道之后创建跨度。那部分没有任何区别。
答案 1 :(得分:0)
纠正我,如果我错了。如果您是想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,trace-id应该是其中的标签之一。