错误

使用SpringCloud的时候，增加了权限控制，控制台总是报注册失败，如下错误

2019-01-06 21:31:46.147  WARN 3456 --- [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]

错误原因

原因是springboot引入spring-boot-starter-security做安全校验后，自动开启CSRF安全认证，故启动时会报如上错误。

解决方案：

在服务端增加配置类

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter{

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // TODO Auto-generated method stub
        http.csrf().disable();
        super.configure(http);
    }

}

或者在启动类加

@EnableWebSecurity
static class WebSecurityConfig extends WebSecurityConfigurerAdapter {
   @Override
    protected void configure(HttpSecurity http) throws Exception {
     http.csrf().ignoringAntMatchers("/eureka/**");
     super.configure(http);
    }
}    

成功注册但控制台依旧报错：原因是开启了Eureka的自注册或是没有配置Security的帐号密码

解决方案关闭自注册

#是否将自己注册到其他Eureka Server,默认为true 需要
eureka.client.register-with-eureka=true
#是否从eureka server获取注册信息， 需要
eureka.client.fetch-registry=true