server.port in command line not working with spring cloud config server and eureka server

Question

I am studying spring could. What I have now is a spring cloud config server and eureka server.

Code for Config Server

@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

application.properties

spring.application.name=config-server
spring.cloud.config.server.git.uri=https://github.com/vincentwah/spring-cloud-config-repository/
server.port=7001

Code for Eureka server

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}

bootstrap.properties

spring.application.name=eureka-server
spring.cloud.config.uri=http://localhost:7001/

The config for eureka-server is https://github.com/vincentwah/spring-cloud-config-repository/blob/master/eureka-server.properties

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.serviceUrl.defaultZone=http://localhost:${server.port}/eureka/
server.port=1111

When I start eureka server, I'd like to change the port, so I run below command

java -jar target/eureka-server-0.0.1-SNAPSHOT.jar --server.port=1234

However, the server is still started with port 1111

2017-01-03 14:04:11.324  INFO 6352 --- [      Thread-10] c.n.e.r.PeerAwareInstanceRegistryImpl    : Changing status to UP
2017-01-03 14:04:11.339  INFO 6352 --- [      Thread-10] e.s.EurekaServerInitializerConfiguration : Started Eureka Server
2017-01-03 14:04:11.492  INFO 6352 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 1111 (http)
2017-01-03 14:04:11.493  INFO 6352 --- [           main] c.n.e.EurekaDiscoveryClientConfiguration : Updating port to 1111
2017-01-03 14:04:11.500  INFO 6352 --- [           main] com.example.EurekaServerApplication      : Started EurekaServerApplication in 27.532 seconds (JVM running for 29.515)

I think I am not doing wrong with --server.port in command line. Does anybody encounter same issue?

Answer 1

Spring Cloud Config, by default, overrides local configuration. It is meant to be the source of truth. You could use profiles so the port is not defined with a particular profile. You could also disable the config client if it's not really needed (in tests for example).

There are also options to allow overrides.

The property sources that are added to you application by the bootstrap context are often "remote" (e.g. from a Config Server), and by default they cannot be overridden locally, except on the command line. If you want to allow your applications to override the remote properties with their own System properties or config files, the remote property source has to grant it permission by setting spring.cloud.config.allowOverride=true (it doesn’t work to set this locally). Once that flag is set there are some finer grained settings to control the location of the remote properties in relation to System properties and the application’s local configuration: spring.cloud.config.overrideNone=true to override with any local property source, and spring.cloud.config.overrideSystemProperties=false if only System properties and env vars should override the remote settings, but not the local config files.

Answer 2

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.serviceUrl.defaultZone=http://localhost:${server.port}/eureka/
server.port=1111
spring.cloud.config.allowOverride=true
spring.cloud.config.overrideNone=true
spring.cloud.config.overrideSystemProperties=false

This is working.