Developing distributed systems can be challenging. Complexity is moved from the application layer to the network layer and demands greater interaction between services. Making your code ‘cloud-native’ means dealing with 12-factor issues such as external configuration, statelessness, logging, and connecting to backing services. Steeltoe with Spring Cloud suite of projects contains many of the services you need to make your applications run in the cloud.
Service discovery
In the cloud, applications can’t always know the exact location of other services. A service registry, such as Netflix Eureka or HashiCorp Consul, can help. Steeltoe provides clients for both as well as Spring Config, a C# implementation of circuit breakers, and many other components.

Cloud configuration
In the cloud, configuration can’t simply be embedded inside the application. The configuration has to be flexible enough to cope with multiple applications, environments, and service instances, as well as deal with dynamic changes without downtime. Spring Cloud Config is designed to ease these burdens and offers integration with version control systems like Git to help you keep your configuration safe.

Circuit breakers
Distributed systems can be unreliable. Requests might encounter timeouts or fail completely. A circuit breaker can help mitigate these issues, and Spring Cloud Circuit Breaker gives you the choice of three popular options: Resilience4J, Sentinel, or Hystrix.

Debugging distributed applications can be complex and take a long time. For any given failure, you might need to piece together traces of information from several independent services. Spring Cloud Sleuth can instrument your applications in a predictable and repeatable way. And when used in conjunction with Zipkin, you can zero in on any latency problems you might have.

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