Problem with unknown ports on Spring Eureka Client registration - spring-boot

Question

Well, a have tried ALL tutorials, ALL answer on Stackoverflow. But I still face the same error:
On Heroku, Eureka Clients are receiving random ports that I don't know where they come from.
And these random ports are different from Heroku Environment variable $PORT. I know that $PORT is the container Dyno port, not the host port xxxxx.herokuapp.com that the out side world can access. Again, I don't know where these ports come from!!!
The link clients in the Eureka Dashboard stay like this:
hdfb2324-8jfw-83ud-dkdf-9ej90jefj201.qwer.dyno.rt.heroku.com:inight-ws-gateway:${RANDOM PORT}
When I click, go to https://inight-ws-gateway.herokuapp.com:${RANDOM PORT}/actuator/info. I take the Timeout because the correct port is 443, Https default.
I have 3 applications, 1 Eureka Server and 2 Eureka Clients (Zuul Gateway and a trivial Rest API).
Every works ok when I run in my localhost, but when I deploy in Heroku, it's happen.
Eureka Server application.yaml:
server:
port: ${PORT}
spring:
application:
name: '#project.artifactId#' # inight-ws-discovery
version: '#project.version#'
eureka:
client:
fetch-registry: false
register-with-eureka: false
management:
endpoints:
enabled-by-default: false
web:
exposure:
include:
- health
- info
endpoint:
health:
enabled: true
info:
enabled: true
Eureka Client (Zuul gateway) application.yaml:
server:
port: ${PORT}
spring:
application:
name: '#project.artifactId#' # inight-ws-gateway
version: '#project.version#'
eureka:
instance:
hostname: ${INIGHT_EUREKA_INSTANCE_HOSTNAME} # inight-ws-gateway.herokuapp.com
client:
enabled: true
fetch-registry: true
register-with-eureka: true
service-url:
defaultZone: ${INIGHT_EUREKA_CLIENT_SERVICE_URL_DEFAULTZONE} # https://inight-ws-discovery.herokuapp.com/eureka/
healthcheck:
enabled: true
zuul:
sensitive-headers:
- Cookie
management:
endpoints:
enabled-by-default: false
web:
exposure:
include:
- health
- info
- routes
endpoint:
health:
enabled: true
info:
enabled: true
routes:
enabled: true
jwt:
config:
privateKey: ${INIGHT_JWT_CONFIG_PRIVATEKEY}
Eureka Client (Rest API) application.yaml:
server:
port: ${PORT}
spring:
application:
name: '#project.artifactId#' # inight-ws-auth
version: '#project.version#'
datasource:
hikari:
schema: inight
jdbc-url: ${INIGHT_DATASOURCE_JDBC_URL}
username: ${INIGHT_DATASOURCE_USERNAME}
password: ${INIGHT_DATASOURCE_PASSWORD}
driver-class-name: ${INIGHT_DATASOURCE_DRIVER_CLASS_NAME}
jpa:
show-sql: ${INIGHT_JPA_SHOW_SQL}
hibernate:
ddl-auto: ${INIGHT_JPA_HIBERNATE_DDL_AUTO}
eureka:
instance:
hostname: ${INIGHT_EUREKA_INSTANCE_HOSTNAME} inight-ws-auth.herokuapp.com
client:
enabled: true
service-url:
defaultZone: ${INIGHT_EUREKA_CLIENT_SERVICE_URL_DEFAULTZONE} https://inight-ws-discovery.herokuapp.com/eureka/
healthcheck:
enabled: true
management:
endpoints:
enabled-by-default: false
web:
exposure:
include:
- health
- info
endpoint:
health:
enabled: true
info:
enabled: true
jwt:
config:
privateKey: ${INIGHT_JWT_CONFIG_PRIVATEKEY}
swagger.basePackage: br.com.bz.inight.auth.controller

Answer 1

my fault!!!!!
I have a couple of microservices on Heroku:
Eureka Server
Zuul Gateway
Some app services
The link on Eureka Server Dashboard, doesn't matter. Whats matter is the https://GATEWAY.herokuapp.com/actuator/routes and the <port enabled="true">80</port> on https://EUREKA_SERVER.herokuapp.com/eureka/apps.
But for this happen (<port enabled="true">80</port> on app services) you MUST ,EXPLICITLY, declare in application.yaml
eureka:
instance:
non-secure-port: 80
hostname: ${EUREKA_CLIENT_INSTANCE_HOSTNAME} # herokuapp_name.herokuapp.com
If you read the documentation, you will see that the property eureka.instance.non-secure-port has the default value 80. I don't know why, but, if you don't declare it, the <port enabled="true">80</port> are not set up on microservices applications on Eureka Server.
Check the tutorial https://blog.heroku.com/managing_your_microservices_on_heroku_with_netflix_s_eureka.
Well, these are my architecture application.yaml:
coffee-eureka-server application.yaml
spring:
application:
name: '#project.artifactId#'
server:
port: ${PORT}
eureka:
instance:
hostname: ${EUREKA_CLIENT_INSTANCE_HOSTNAME} # herokuapp_name.herokuapp.com
client:
fetch-registry: false
register-with-eureka: false
service-url:
defaultZone: ${EUREKA_SERVER_URI}/eureka/ # in this case, same value of eureka.instance.hostname, but with https:// prefix, of course
coffee-zuul-gateway application.yaml
spring:
application:
name: '#project.artifactId#'
server:
port: ${PORT}
eureka:
instance:
hostname: ${EUREKA_CLIENT_INSTANCE_HOSTNAME} # herokuapp_name.herokuapp.com
client:
fetch-registry: true
register-with-eureka: true
service-url:
defaultZone: ${EUREKA_SERVER_URI}/eureka/
management:
endpoints:
enabled-by-default: true
web:
exposure:
include:
- routes
- info
- health
coffee-simple-ms application.yaml
spring:
application:
name: '#project.artifactId#'
server:
port: ${PORT}
eureka:
instance:
non-secure-port: 80 # <<<<<<<<< HERE
hostname: ${EUREKA_CLIENT_INSTANCE_HOSTNAME} # herokuapp_name.herokuapp.com
client:
fetch-registry: true
register-with-eureka: true
service-url:
defaultZone: ${EUREKA_SERVER_URI}/eureka/

Answer 2

When I click, go to https://inight-ws-gateway.herokuapp.com:${RANDOM PORT}/actuator/info. I take the Timeout because the correct port is
443, Https default.
When you are hosting on localhost the link would be: http://localhost:${PORT}/actuator/info
On Heroku this link is: https://inight-ws-gateway.herokuapp.com/actuator/info
The difference:
It is using http secure, https
The port number is "gone"
The hostname inight-ws-gateway.herokuapp.com is automatically translated into a ${IP_ADDRESS}:${PORT}.
You will need to adjust your source code for the https URL generation.
Your web application will run on a port different from the usual http/https port. It does not have to be 80, 8080 or 443. It can be any port. And that port is specified by Heroku through $PORT.