Register spring boot https application in eureka with specific port

I am trying to register an application available through https only. I have problem with correct configuration and links displayed in eureka's dashboard are not correct. I have tried some configurations but I can't get the right effect i.e. working dashboard links in Eureka.

My base configuration.

server:
  port: 9999
  context-path: /ctx
  ssl:
    key-store: classpath:keystore.jks
    key-store-password: 'kspass'
    key-password: 'kpass'
    keyAlias: ssl

spring:
  application:
    name: app-ctx
  cloud:
    loadbalancer:
      retry:
        enabled: true

eureka:
  client:
    serviceUrl:
      defaultZone: https://localhost:8761/eureka/
  instance:
    hostname: localhost
    secure-port-enabled: true
    non-secure-port-enabled: false
    secure-port: ${server.port}
    health-check-url: https://${eureka.hostname}:XYZ/ctx/health
    status-page-url: https://${eureka.hostname}:XYZ/ctx/info
    home-page-url: https://${eureka.hostname}:XYZ/ctx

I have tried following versions of health/status/home URLs:

1. Absolute URLs without port

   Example: health-check-url: https://${eureka.hostname}/ctx/health

   Result: https://localhost/ctx/info

2. Absolute URLs with ${server.port} replacement

   Example: health-check-url: https://${eureka.hostname}:${server.port}/ctx/health)

   Result: ${server.port} not resolved, url in dashboard is: https://localhost:${server.port}/ctx/info

3. Relative URLs

   Example: health-check-url-path: /ctx/health

   Result: http://localhost:9999/ctx/info, no https.

Last one is quite close to my expectations, but there is no https.

Finally I've got solution for my problem. Not sure it that's the best one because as far as I can see it doesn't work with random ports i.e. server.port = 0. In that case eureka registers application with port 0 and on dashboard there is link with port that does not forward to correct location and that's not expected behavior.

Instead of using ${server.port} placeholder that is related to current application we have to use eureka's part of configuration ${eureka.instance.secure-port} i.e.

server:
  port: 9999
  context-path: /ctx
  ssl:
    key-store: classpath:keystore.jks
    key-store-password: 'kspass'
    key-password: 'kpass'
    keyAlias: ssl

spring:
  application:
    name: app-ctx
  cloud:
    loadbalancer:
      retry:
        enabled: true

eureka:
  client:
    serviceUrl:
      defaultZone: https://localhost:8761/eureka/
  instance:
    hostname: localhost
    secure-port-enabled: true
    non-secure-port-enabled: false
    secure-port: ${server.port}
    health-check-url: https://${eureka.instance.hostname}:${eureka.instance.secure-port}/ctx/health
    status-page-url: https://${eureka.instance.hostname}:${eureka.instance.secure-port}/ctx/info
    home-page-url: https://${eureka.instance.hostname}:${eureka.instance.secure-port}/ctx