Propagating B3-Headers

[jaegertracing]

Propagating B3-Headers

[yurishkuro]

Most Jaeger clients support b3, make sense to have it here too. Eventually W3C Trace Context will be the go to encoding.

[yurishkuro]

Here's an example from Java client: https://github.com/jaegertracing/jaeger-client-java/blob/dfb9d8b9dc849f2e6f880b44b26fb77dfc894a02/jaeger-core/src/main/java/io/jaegertracing/internal/propagation/B3TextMapCodec.java

[isaachier]

Trace ID is not represented as a tag. The UI might cause it to look like it is a tag, but it is not. I don't understand your example. What do you need the identifier for specifically? We handle the trace metadata internally and prefer not to expose it directly. Eventually, we will expose a method for this in the OpenTracing API, but not yet. Also, you are correct that we have no plans of supporting B3 at this time.

[yurishkuro]

I think if someone creates a PR with B3 codec, we'll accept it, most other Jaeger clients support it.

[isaachier]

Really? I gotta look into this some more...

[Pratik-Shah]

Hi All, we have a similar requirement where our applications are c++ based running along with service mesh ( istio ) . We started using jaeger client for the application without service mesh and post service mesh it seems we will be unable to extract the headers and create a childOf relation from the envoy span as there are based on zipkin. My assumption here is that this feature of having B3 codec would help. So is there a plan to have it in c++ client. Or is there a different approach we should take ? Please guide.

[isaachier]

First, are you using envoy or istio or both? I know it is not exactly publicized but envoy has built-in jaeger support (see https://www.envoyproxy.io/docs/envoy/latest/start/sandboxes/jaeger_tracing).

[Pratik-Shah]

First, are you using envoy or istio or both? I know it is not exactly publicized but envoy has built-in jaeger support (see https://www.envoyproxy.io/docs/envoy/latest/start/sandboxes/jaeger_tracing).

We are using both ( istio + envoy ). I will also look at this jaeger support reference.