The new version of Spring Boot Actuator—2.x Actuator, has been introduced with a simplified model, extended capabilities, and better incorporated defaults. In this version, the security model is integrated with the application for simplification. Some more HTTP requests and responses, and Java APIs, have also been added. The newest version also supports CRUD against the model of read-write it had before.

Actuator 2.x defines the extensible model, which is also pluggable and does not depend on MVC. Hence, you can utilize MVC and Web Flux. In the new version, endpoints also come disabled by default. Should you want to turn them all on, you can use the following:

management.endpoints.web.expose = *. 

Or if you do not want to enable all the endpoints, you can simply list the ones you want to enable and let others be. All Actuator endpoints are now also set under /actuator path by default.

Spring Boot 2.x Actuator has also introduced some more built-in endpoints:

• /conditions: This is simply auto-config renamed
• /Prometheus: This is also the same as metrics, but it supports a Prometheus server
• Scheduledtasks: This endpoint provides details of every scheduled task in the application
• /sessions: This is a list of HTTP sessions using Spring Sessions
• /threaddump: This endpoint dumps the thread information

Spring Boot 2.x Actuator allows you to manipulate the endpoints in similar ways to previous versions. You can customize them; however, there have been a few changes introduced to the method of customization. This is mostly because 2.x Actuator supports CRUD operations instead of just read and write. And you can also add new endpoints to existing ones, with your own configurations and implementations.

Spring Boot Actuator allows you to manipulate and manage your application very easily.