This example demonstrates how you can use Netflix Ribbon and Hystrix with Spring Boot
This example is related to spring-boot-webmvc which this example will call and output its response.
In case the spring-boot-webmvc is not running then the Hystrix circuit breaker should detect this
and return a fallback response.
The example can be built with
mvn clean install
The example can be run locally using the following Maven goal:
mvn spring-boot:run
It is assumed a running Kubernetes platform is already running. If not you can find details how to get started.
Assuming your current shell is connected to Kubernetes or OpenShift so that you can type a command like
kubectl get pods
or for OpenShift
oc get pods
Then the following command will package your app and run it on Kubernetes:
mvn fabric8:run
To call the service from a web browser you need to append the context path /hello to the service URL, something like
http://192.168.99.100:31824/hello
Depending on whether spring-boot-webmvc is running or not, then calling the service will return different response as
Reply: Hello World!
.. will be returned when spring-boot-webmvc is running, and
Hello Fallback
.. is returned.
You can also use the fabric8 developer console to manage the running pods, and view logs and much more.
You can find more details about running this quickstart on the website. This also includes instructions how to change the Docker image user and registry.