前言
前面两章介绍了将生产者和消费者微服务注册到Eureka Server上，但是为了增加安全性需要在Eureka上增加白名单，进行注册权限控制。本章将介绍Spring Cloud集成Security进行简单认证功能。
Eureka Server集成Security
这是官网上介绍使用Eureka服务器进行身份验证，如果尝试过的话会发现并没有什么卵用，还需要添加其他的配置才行。
这里复制一份microservice-discovery-eureka 微服务代码，修改为microservice-discovery-eureka-security。
第一步：增加依赖
pom.xml增加依赖如下
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
第二步：增加配置
spring:
security:
user:
name: user
password: 123456
修改defaultZone
# defaultZone: http://127.0.0.1:8761/eureka/
defaultZone: http://user:123456@127.0.0.1:8761/eureka/
备注：name和password可以随意修改。
第三步：启动测试
输入地址：http://127.0.0.1:8761/，如下图所示：
会跳转的login页面，需要输入配置的user和password才能正常使用eureka控制台。
将生产者微服务注册到Eureka Server
复制一份商品微服务（microservice-consumer-goods）代码，修改名称为microservice-consumer-goods-security
第一步：增加依赖
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
第二步：增加配置
spring:
application:
# 指定注册到eureka server上的服务名称
name: microservice-consumer-goods-security
security:
user:
name: user
password: 123456
修改defaultZone
# eureka server的通讯地址，注意路径
# defaultZone: http://127.0.0.1:8761/eureka/
defaultZone: http://user:123456@127.0.0.1:8761/eureka/
第三步：启动测试
启动出现Cannot execute request on any known server错误
--- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failure with status code 401; retrying on another server if available
2019-01-06 21:31:46.160 WARN 3456 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_UNKNOWN/192.168.0.104:8090 - registration failed Cannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:829) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:121) [eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.InstanceInfoReplicator$1.run(InstanceInfoReplicator.java:101) [eureka-client-1.9.3.jar:1.9.3]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_181]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_181]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_181]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
......省略更多
原因：
引入spring-boot-starter-security做安全校验后，自动开启CSRF安全认证，任何一次服务请求默认都需要CSRF 的token（自行补脑Spring的CSRF验证），而Eureka-client不会生成该token，故启动时会报如上错误。
解决方案
microservice-discovery-eureka-security 中MicroserviceDiscoveryEurekaSecurityApplication启动类增加如下配置：
@EnableWebSecurity
static class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().ignoringAntMatchers("/eureka/**");
super.configure(http);
}
}
配套代码
主代码库：https://github.com/yundianzixun/spring-cloud-studyEureka Service 集成Security：https://github.com/yundianzixun/spring-cloud-study/tree/master/microservice-discovery-eureka-security生产者微服务集成Security：https://github.com/yundianzixun/spring-cloud-study/tree/master/microservice-consumer-goods-security
注意：本文归作者所有，未经作者允许，不得转载
