Use lettuce's native tracing functionality

[SimoneGiusso]

Hi!

I would like to use the lettuce's native tracing functionality to see spans for each redis call and include relevant info in the trace (redis key, etc...).

I saw that openTelemetry provides already an implementation of the lettuce Tracing interface here.

However I don't know how to use it since I cannot use this OpenTelemetryTracing class and configure tracing through ClientResources as suggest in the lettuce documentation since OpenTelemetryTracing is not public.

I have to add some configuration I guess. Can someone help me figure out what I missed?. Btw this is the demo I'm using to test this tracing functionality.

[mateuszrzeszutek]

Hey @SimoneGiusso ,
The entrypoint of the Lettuce instrumentation library is the LettuceTelemetry class. Once you construct it, you can use the newTracing() method to obtain an instance of Lettuce Tracing that you can use on ClientResource. See one of our tests for a brief example.

[SimoneGiusso]

Thank you!

I share how I configured the LettuceConnectionFactory (basic settings):

    @Bean
    public ReactiveRedisConnectionFactory reactiveRedisConnectionFactory(OpenTelemetry openTelemetry) {
        RedisConfiguration redisConfiguration = new RedisStandaloneConfiguration("localhost", 6379);
        LettuceClientConfiguration lettuceClientConfiguration = LettuceClientConfiguration.builder().
            clientResources(ClientResources.builder()
                .tracing(LettuceTelemetry.create(openTelemetry).newTracing())
                .build())
            .build();

        return new LettuceConnectionFactory(redisConfiguration, lettuceClientConfiguration);
    }

Where OpenTelemetry it's a spring bean autogenerated with spring-cloud-sleuth-otel-autoconfigure.

It works!