运行Eureka Server
将Eureka Server集成到应用中，只需要在pom中加入
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| <dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
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接着在启动类上加入@EnableEurekaServer
最后配置application.yml
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| server:
port: 8761
eureka:
instance:
hostname: localhost
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
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高可用
在生产环境下，往往会部署多个eureka实例，使它们相互注册，实现的方式是通过修改配置实现
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| ---
spring:
profiles: peer1
eureka:
instance:
hostname: peer1
client:
serviceUrl:
defaultZone: http://peer2/eureka/
---
spring:
profiles: peer2
eureka:
instance:
hostname: peer2
client:
serviceUrl:
defaultZone: http://peer1/eureka/
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这样客户端在使用的时候，在指定注册中心时，指定多个，用逗号隔开
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| eureka:
client:
serviceUrl:
defaultZone: http://peer1/eureka/,http://peer2/eureka
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安全的 Eureka Server
通过加入spring-boot-starter-security，使服务的注册与发现操作开启认证。
禁用CSRF
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| @EnableWebSecurity
class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().ignoringAntMatchers("/eureka/**");
super.configure(http);
}
}
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在配置中加入
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| spring:
security:
user:
name: admin
password: pwd
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修改defaultZone，指定name&password，这里需要注意的是，所有的配置defaultZone的地方都需要配置name&password，包括Eureka Server本身
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| eureka:
instance:
hostname: localhost
prefer-ip-address: true
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: http://admin:pwd@${eureka.instance.hostname}:${server.port}/eureka/
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