Spring Boot @RestController Example with Chaos Monkey Enabled in Spring Application Properties
Description
This project contains the sample code used in The Practical Developer Blog. It's a Spring Boot application with one plain Java object (SpanishGreeting) and a Spring Controller SpanishGreetingController.
The main goal of the project is to show how to write a @RestController in Spring Boot and include documentation with Swagger.
How does it work?
You can use the endpoints behind http://localhost:8082/spanish-greetings. If you append /random to a GET request you'll receive a random Spanish greeting (which are actually hard-coded). You can also GET them by id (only from 1 to 3). To create a new one, you need to perform a POST operation.
Actually, much better if you just start the application and navigate to http://localhost:8082/swagger-ui.html. There you'll find a nice API documentation thanks to Swagger. Moreover, you can play with it.
Upon Succesful Initialization of Chaos Monkey you should see something like this :
In addition to the end points and controller, chaos testing can be done as shown using postman for the endpoints exposed under actuator:
Change the Assaults Configuration to invoke Methods within the Application:
Confirm Response:
Initiate the Attack Vector:
Sample Response 1:
Sample Response 2:
Confirmation of Runtime Exceptions Activated:
Logs Confirming Chaos Monkey Bringing Down Application:
Before changing the attack vector assaults configuration is default as shown :
Logs:
After changing attack vector:
Initating Attack:
Confirmation of Shutdown via Logs :
#CPU Attack wit hMemory Assaults:
Configuration changes to pom.xml and prometheus.yml :
pom.xml:
prometheus.yml:
Prometheus UI showing targets up :
CPU attack assault in Spring Boot Application:
Spike in Cpu Utilization seen in Prometheus:
Injected Latency attack :
After disabling chaos
