Spring Cloud Consul, Bus (with Kafka binder) and Config causing double Consul registrations

README.md

The following scenario causes double Consul registrations:

• spring.cloud.bus.enabled=true
• spring.cloud.config.discovery.enabled=true

...
2016-05-06 22:23:54.086  INFO 92515 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-05-06 22:23:54.087  INFO 92515 --- [           main] o.s.c.consul.discovery.ConsulLifecycle   : Registering service with consul: NewService{id='consul-bus-double-1324109920', name='consul-bus-double', tags=[], address='192.168.1.6', port=8080, check=Check{script='null', interval=10s, ttl=null, http=http://192.168.1.6:8080/health, timeout=null}}
2016-05-06 22:23:54.104  INFO 92515 --- [           main] o.s.c.consul.discovery.ConsulLifecycle   : Registering service with consul: NewService{id='consul-bus-double-912460132', name='consul-bus-double', tags=[], address='192.168.1.6', port=8080, check=Check{script='null', interval=10s, ttl=null, http=http://192.168.1.6:8080/health, timeout=null}}
2016-05-06 22:23:54.110  INFO 92515 --- [           main] io.switchbit.Application                 : Started Application in 18.38 seconds (JVM running for 18.759)
...

When either spring.cloud.bus.enabled=false or spring.cloud.config.discovery.enabled=false and the other is true then only a single registration (expected) takes place.

...
2016-05-06 22:28:02.542  INFO 92602 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0
2016-05-06 22:28:02.542  INFO 92602 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 2147482647
2016-05-06 22:28:02.603  INFO 92602 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2016-05-06 22:28:02.607  INFO 92602 --- [           main] o.s.c.consul.discovery.ConsulLifecycle   : Registering service with consul: NewService{id='consul-bus-double-1075211196', name='consul-bus-double', tags=[], address='192.168.1.6', port=8080, check=Check{script='null', interval=10s, ttl=null, http=http://192.168.1.6:8080/health, timeout=null}}
2016-05-06 22:28:03.189  INFO 92602 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
...

Application.java

package io.switchbit;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class Application {

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

application.yml

spring:
  cloud:
    bus:
      enabled: true
    stream:
      kafka:
        binder:
          zkNodes: kafka
          brokers: kafka

bootstrap.yml

spring:
  application:
    name: ${project.artifactId}
  cloud:
    consul:
      enabled: true
      discovery:
        instanceId: ${spring.application.name}
        preferIpAddress: true
      host: consul
    config:
      enabled: true
      fail-fast: true
      discovery:
        enabled: true # if spring.cloud.bus.enabled=true and this is false, then *no* double registration
        serviceId: config-server

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>io.switchbit</groupId>
    <artifactId>consul-bus-double</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-kafka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Brixton.RC2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

</project>

If you are just using consul for discovery and not configuration, then use spring-cloud-starter-consul-discovery. You could also just import one bom if you imported spring-cloud-dependencies:Brixton.RC2, then you don't have to know 1.0.0 vs 1.1.0.