Sleuth lettuce propagation test

1. Execute docker-compose up at the project root to setup redis and zipkin.
2. Start the SpringBootApplication
3. Execute curl localhost:9090/ping
4. Check out the zipkin.(localhost:19411)

Environment

• Java 1.8.0_201

Dependencies

Versions

• Spring Boot 2.6.0-M1
• Spring Cloud 2021.0.0-M1

Libraries

• org.springframework.boot:spring-boot-starter-webflux
• org.springframework.boot:spring-boot-starter-data-redis-reactive
• io.projectreactor.kotlin:reactor-kotlin-extensions
• org.jetbrains.kotlin:kotlin-reflect
• org.jetbrains.kotlin:kotlin-stdlib-jdk8
• org.jetbrains.kotlinx:kotlinx-coroutines-reactor
• org.springframework.cloud:spring-cloud-sleuth-zipkin
• org.springframework.cloud:spring-cloud-starter-sleuth