How to get client host/domain name in spring boot controller

I have a spring boot application with one rest api. Will deploy it in one linux server.And we have multiple java applications deployed in multiple linux servers calls that api.Whenever a request made to that end point, I want the host name information to validate.

1. API - http://localhost:8000/test
2. Second spring boot application running in 9000 port localwhen this application make a request to http://localhost:8000/test - I should be able to know which host made a request. here - localhost:9000

I have tried using HttpServletRequest.I'm getting only the below headers from thatHost, connection, user-agent, accept, content-type, content-length.Origin , referer - headers are not present.

Controller code below

@PostMapping("/test")public String authenticateAndGetToken (HttpServletRequest httpServletRequest, @RequestBody Request request) {String errorMsg = "Invalid UserName";Log.info("origin"+httpServletRequest.getHeader(HttpHeaders.ORIGIN));httpServletRequest.getHeaderNames().asIterator().forEachRemaining (xx->System.out.println(xx));Log.info(httpServletRequest.getRemoteAddr());UserDetails userDetails = userInfoService. LoadUserBy Username (request.getUsername

Here origin is nullGetremoteaddr is server adress not client

RestTemplate restTemplate1 = new RestTemplate(); HttpHeaders headers = new HttpHeaders();headers.setContentType (MediaType.APPLICATION_JSON);Map<String, String> map = new HashMap<>();map.put("username", "test");map.put("password", "test");String jsonBody new ObjectMapper().writeValueAsString(map);HttpEntity<String> entity = new HttpEntity<>(jsonBody, headers);ResponseEntity<String> response = restTemplate1.exchange(url: "http://localhost:8000/test", HttpMethod.POST, entity, String.class);