Document how to specify agent/collector endpoint

[jaegertracing]

Document how to specify agent/collector endpoint

[isaachier]

Try updating the config.yml to look something like this:

sampler:
  samplingServerURL: <collector-url>

By default, the value of <collector-url> is 127.0.0.1:5778.

[yurishkuro]

@isaachier I suggest adding a section to the readme

[sebastian-garofalo]

@isaachier
I tried with that but it's ignoring the sampling URL and stills sends the traces to localhost:9411
my config file looks like this:

disabled: false
reporter:
    logSpans: true
sampler:
  type: const
  param: 1
  samplingServerURL: zipkin.istio-system.svc.cluster.local:9411

Also is there any way to see logs of what the library is doing? I can't see any error logs if I stop the localhost jaeger.

[isaachier]

The default logger is noop. You can change it by passing the consoleLogger to the Tracer constructor. See here: https://github.com/jaegertracing/jaeger-client-cpp/blob/master/src/jaegertracing/Logging.h, https://github.com/jaegertracing/jaeger-client-cpp/blob/master/src/jaegertracing/Tracer.h.

[sebastian-garofalo]

I was doing that, but I can only see the traces I generate, but no errors about contacting the collector

void setUpTracer(const char* configFilePath)
{
    auto configYAML = YAML::LoadFile(configFilePath);
    auto config = jaegertracing::Config::parse(configYAML);
    auto tracer = jaegertracing::Tracer::make("followers-service", config, jaegertracing::logging::consoleLogger());
    opentracing::Tracer::InitGlobal(std::static_pointer_cast<opentracing::Tracer>(tracer));
}

And I see something like this

Followers Service starting...
Initializing Jaeger tracing...
INFO: Initializing logging reporter
INFO: Reporting span f218f30d30fd823b:4e0db680f75733dc:f218f30d30fd823b:1
INFO: Reporting span f218f30d30fd823b:f218f30d30fd823b:0:1

[isaachier]

The collector manages the sampling strategy. The agent forwards traces to the collector from your application. It seems you meant to change the agent endpoint. That requires updating the reporting config, not the sampling config. Please override the localAgentHostPort property of the reporter section like so:

reporter:
    logSpans: true
    localAgentHostPort: <agent-host-port>

[isaachier]

Final thought: you might have the correct setup in your application, but your agent might experience errors when it sends traces to an invalid endpoint. See the main Jaeger repo for how to set up the agent etc.

[sebastian-garofalo]

Will do, thanks a lot for your help @isaachier

[isaachier]

No problem, I'll try to add some stuff to the README about this.

[tarunz]

reporter:
    logSpans: true
    localAgentHost: 10.244.1.140
    localAgentHostPort: 6832

Setting yml like this, throws an error:

Running main function
terminate called after throwing an instance of 'std::runtime_error'
  what():  Cannot connect socket to remote address { family=2, addr=0.0.26.176, port=0 }
Aborted (core dumped)

Kindly help @isaachier , how can I define agentHost, agentPort?

[MikeGoldsmith]

@tarunz you pass the host and port in the same parameter:
localAgentHostPort: 10.244.1.140:6832