Skip to main content

NucliaDB Telemetry Library Python process

Project description

NucliaDB Telemetry

Open telemetry compatible plugin to propagate traceid on FastAPI, Nats and GRPC with Asyncio.

ENV vars:

    JAEGER_ENABLED = True
    JAEGER_HOST = "127.0.0.1"
    JAEGER_PORT = server.port

On FastAPI you should add:

    tracer_provider = get_telemetry("HTTP_SERVICE")
    app = FastAPI(title="Test API")  # type: ignore
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)

    set_global_textmap(B3MultiFormat())
    FastAPIInstrumentor.instrument_app(app, tracer_provider=tracer_provider)

    ..
    await init_telemetry(tracer_provider)  # To start asyncio task
    ..

On GRPC Server you should add:

    tracer_provider = get_telemetry("GRPC_SERVER_SERVICE")
    telemetry_grpc = GRPCTelemetry("GRPC_CLIENT_SERVICE", tracer_provider)
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)

    set_global_textmap(B3MultiFormat())
    server = telemetry_grpc.init_server()
    helloworld_pb2_grpc.add_GreeterServicer_to_server(SERVICER, server)

    ..
    await init_telemetry(tracer_provider)  # To start asyncio task
    ..

On GRPC Client you should add:

    tracer_provider = get_telemetry("GRPC_CLIENT_SERVICE")
    telemetry_grpc = GRPCTelemetry("GRPC_CLIENT_SERVICE", tracer_provider)
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)

    set_global_textmap(B3MultiFormat())
    channel = telemetry_grpc.init_client(f"localhost:{grpc_service}")
    stub = helloworld_pb2_grpc.GreeterStub(channel)

    ..
    await init_telemetry(tracer_provider)  # To start asyncio task
    ..

On Nats jetstream push subscriber you should add:

    nc = await nats.connect(servers=[self.natsd])
    js = self.nc.jetstream()
    tracer_provider = get_telemetry("NATS_SERVICE")
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)
    set_global_textmap(B3MultiFormat())
    jsotel = JetStreamContextTelemetry(
        js, "NATS_SERVICE", tracer_provider
    )

    subscription = await jsotel.subscribe(
        subject="testing.telemetry",
        stream="testing",
        cb=handler,
    )

On Nats publisher you should add:

    nc = await nats.connect(servers=[self.natsd])
    js = self.nc.jetstream()
    tracer_provider = get_telemetry("NATS_SERVICE")
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)

    set_global_textmap(B3MultiFormat())
    jsotel = JetStreamContextTelemetry(
        js, "NATS_SERVICE", tracer_provider
    )

     await jsotel.publish("testing.telemetry", request.name.encode())

On Nats jetstream pull subscription you can use different patterns if you want to just get one message and exit or pull several ones. For just one message

    nc = await nats.connect(servers=[self.natsd])
    js = self.nc.jetstream()
    tracer_provider = get_telemetry("NATS_SERVICE")
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)
    set_global_textmap(B3MultiFormat())
    jsotel = JetStreamContextTelemetry(
        js, "NATS_SERVICE", tracer_provider
    )

    # You can use either pull_subscribe or pull_subscribe_bind
    subscription = await jsotel.pull_subscribe(
        subject="testing.telemetry",
        durable="consumer_name"
        stream="testing",
    )

    async def callback(message):
        # Do something with your message
        # and optionally return something
        return True

    try:
        result = await jsotel.pull_one(subscription, callback)
    except errors.TimeoutError
        pass

For multiple messages just wrap it in a loop:

    while True:
        try:
            result = await jsotel.pull_one(subscription, callback)
        except errors.TimeoutError
            pass

On Nats client (NO Jestream! ) publisher you should add:

    nc = await nats.connect(servers=[self.natsd])
    js = self.nc.jetstream()
    tracer_provider = get_telemetry("NATS_SERVICE")
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)

    set_global_textmap(B3MultiFormat())
    ncotel = NatsClientTelemetry(
        nc, "NATS_SERVICE", tracer_provider
    )

     await ncotel.publish("testing.telemetry", request.name.encode())

On Nats client (NO Jestream! ) subscriber you should add:

    nc = await nats.connect(servers=[self.natsd])
    js = self.nc.jetstream()
    tracer_provider = get_telemetry("NATS_SERVICE")
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)
    set_global_textmap(B3MultiFormat())
    ncotel = NatsClientContextTelemetry(
        js, "NATS_SERVICE", tracer_provider
    )

    subscription = await ncotel.subscribe(
        subject="testing.telemetry",
        queue="queue_nname",
        cb=handler,
    )

On Nats client (NO Jestream! ) request you should add:

    nc = await nats.connect(servers=[self.natsd])
    js = self.nc.jetstream()
    tracer_provider = get_telemetry("NATS_SERVICE")
    if not tracer_provider.initialized:
        await init_telemetry(tracer_provider)

    set_global_textmap(B3MultiFormat())
    ncotel = NatsClientTelemetry(
        nc, "NATS_SERVICE", tracer_provider
    )

    response = await ncotel.request("testing.telemetry", request.name.encode())

And to handle responses on the other side, you can use the same pattern as in plain Nats client subscriber, just adding the msg.respond() on the handler when done

Project details


Release history Release notifications | RSS feed

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distributions

No source distribution files available for this release.See tutorial on generating distribution archives.

Built Distribution

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page