I have several applications monitored under Spring Boot Admin. Spring Boot Admin is great at telling me if an application is up or down and other various metrics.
I would also like to know that certain URLs exposed by these applications are returning an HTTP status of 200. Specifically, I would like to send a GET request to these URLs once a day. If it receives a non 200 status from any of these, it sends an email stating which URLs are reporting non 200.
Is something that Spring Boot Admin is able to do? I know about custom HealthIndicators but not sure if it can be scheduled or if it's appropriate for this.
Just wanted to see if there is something Spring Boot Admin offers to support doing this before I build my own app to make the GET calls and send the email.
Update
The URLs are exposed as Eureka services and I'm calling services from other services via Spring Cloud OpenFeign.
Update 2
I went ahead and built my own custom application to handle this. Details follow but still interested if Spring offers something out-of-the-box to do this.
application.yml
app:
serviceUrls:
- "http://car-service/cars?category=sedan"
- "http://truck-service/trucks"
cron: "0 0 10 * * *"
Urls are read into:
@Component
@ConfigurationProperties(prefix = "app")
@Getter
@Setter
public class ServiceUrls {
private String[] serviceUrls;
}
Via cron, scheduled to run once a day:
@Component
@RequiredArgsConstructor
@Slf4j
public class ServiceCheckRunner {
private final ServiceHealth serviceHealth;
@Scheduled(cron = "${cron}")
public void runCheck() {
serviceHealth.check();
}
}
This is the code that checks whether URLs return no errors:
@Service
@RequiredArgsConstructor
@Slf4j
public class ServiceHealth {
private final ServiceUrls serviceUrls;
private final RestTemplate rest;
public void check() {
List<String> failedServiceUrls = new ArrayList<>();
for (String serviceUrl : serviceUrls.getServiceUrls()) {
try {
ResponseEntity<String> response = rest.getForEntity(serviceUrl, String.class);
if (!response.getStatusCode().is2xxSuccessful()) {
failedServiceUrls.add(serviceUrl);
}
} catch (Exception e){
failedServiceUrls.add(serviceUrl);
}
}
// code to send an email with failedServiceUrls.
}
}
