获取已发送请求的跟踪 ID

Question

我正在为 GRPC 使用 Open Tracing Python 库，并尝试在此处构建示例脚本：https://github.com/opentracing-contrib/python-grpc/blob/master/examples/trivial/trivial_client.py.

通过拦截通道发送请求后，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

Answer 1

如果我错了，请纠正我。如果你的意思是如何在服务器端找到trace-id，你可以尝试通过get_active_span访问OpenTracing span。我想trace-id应该是里面的标签之一。

Answer 2

我遗漏了一份关键文档。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。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。

获取已发送请求的跟踪 ID

get trace ID of sent request

python

zipkin

grpc

opentracing

jaeger