checking whether spring boot application is running or not

Question

I've created a spring boot project and deployed it on a vm. I've added a command in local.rc that starts the spring boot application on reboot. I want to check whether the command got executed and the application is running. How do I do that?

Answer 1

There are two ways

1. On system level - you can run your project as a service, which is documented in the Official documentation - Deployments . Then you can query the application status service myapp status .

2. On application level - include Spring Boot Actuator in your app and use the Actuator endpoints such as /actuator/health as per Official documentation - Production Ready Endpoints . These endpoints can be exposed via HTTP or JMX .

Note: prior to spring boot 2.0 the actuator endpoint is /health

Answer 2

If it's a web project, it makes sense to include spring-boot-actuator (just add a dependency in maven and start the microservice).

In this case, it will automatically expose the following endpoint (for example, its actually can be flexibly set up):

http://<HOST>:<PORT>/health

Just issue an HTTP GET request, and if you get 200 - it's up and running.

If using an actuator is not an option (although it should be really addressed as a first bet), then you can merely telnet to http://<HOST>:<PORT>

The ratio behind this is that that PORT is exposed and ready to "listen" to external connections only after the application context is really started.