In a distributed system your services usually communicate via HTTP and expose REST APIs. External clients

Tracing method calls in a monolith to identify slow parts is simple. Everything is happening in

Exposing REST endpoints usually requires documentation for your clients. This documentation usually includes the following: accepted

Once your application is deployed to production you want to ensure it’s up– and running. To

Ensuring a stable operation of your application in production requires monitoring. Without monitoring, you have no

Injecting configuration properties like JDBC URLs, passwords, usernames, or hostnames from external sources is a common requirement