0    课程地址

https://coding.imooc.com/lesson/380.html#mid=28550

 

1    自我提升
1.1  重点知识

a  maven打包相关指令:

# 进行打包
mvn clean package -Dmaven.test.skip=true -U

#bootstrap.yml生效的server
java -jar coupon-eureka-1.0-SNAPSHOT.jar --spring.profiles.active=server1

 

 

1.2  踩过的坑

a  多个eureka server启动报错

报错内容:

com.sun.jersey.api.client.ClientHandlerException: org.apache.http.conn.ConnectTimeoutException: Connect to server1:8001 timed out
        at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
        at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar!/:1.19.1]
        at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.8.jar!/:1.9.8]

 

解决方案:

修改的hosts文件位置不对,其路径应该为C:\Windows\System32\drivers\etc

 

b  多个eureka server启动报错

报错内容:

 

2021-01-10 08:18:27.909 ERROR 9312 --- [           main] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://server1:8001/eureka/}

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
        at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
        at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar!/:1.19.1]
        at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.8.jar!/:1.9.8]
        at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar!/:1.19.1]

 

解决方案:

通过对比错误的yml和正确的yml,发现是profiles制表位不对,应该往前提一位(认为yml配置文件不如properties文件的地方,书写格式有问题不容易排查)

spring:
  application:
    name: coupon-eureka
#这是正确的 profiles: server3 server: port: 8003 eureka: instance: hostname: server3 prefer-ip-address: false client: service-url: defaultZone: http://server1:8001/eureka,http://server2:8002/eureka

 

 

 

2    课程内容
2.1  多server启动配置:

a  注掉application.yml

b  添加bootstrap.yml

spring:
  application:
    name: coupon-eureka
  profiles: server1
server:
  port: 8001
eureka:
  instance:
    hostname: server1
    prefer-ip-address: false
  client:
    service-url:
      defaultZone: http://server2:8002/eureka,http://server3:8003/eureka

---

spring:
  application:
    name: coupon-eureka
  profiles: server2
server:
  port: 8002
eureka:
  instance:
    hostname: server2
    prefer-ip-address: false
  client:
    service-url:
      defaultZone: http://server1:8001/eureka,http://server3:8003/eureka

---

spring:
  application:
    name: coupon-eureka
  profiles: server3
server:
  port: 8003
eureka:
  instance:
    hostname: server3
    prefer-ip-address: false
  client:
    service-url:
      defaultZone: http://server1:8001/eureka,http://server2:8002/eureka

 

c  配置hosts文件

windows系统,打开路径C:\Windows\System32\drivers\etc,修改配置文件添加:

127.0.0.1  server1
127.0.0.1  server2
127.0.0.1  server3

修改后,保存

 

 

d  执行maven命令打包

打开idea terminal窗口,切到跟路径:F:\kewai\SpringCloud\laoqin\imooc-coupon>

打包:

mvn clean package -Dmaven.test.skip=true -U

打包后在coupon-eureka模块下能看到相关jar包

 

 

 

 

e  分别(选择性的使用配置文件bootstrap.yml部分属性)运行jar包

前两个窗口报错正常(因为还没启动第三个server),第三个server不应该报错

e.1  第一个ideaterminal窗口,切到coupon-eureka的target路径下(jar包路径)

java -jar coupon-eureka-1.0-SNAPSHOT.jar --spring.profiles.active=server1

 

e.2  打开第二个ideaterminal窗口,切到coupon-eureka的target路径下(jar包路径)

java -jar coupon-eureka-1.0-SNAPSHOT.jar --spring.profiles.active=server2

 

e.3  打开第三个ideaterminal窗口,切到coupon-eureka的target路径下(jar包路径)

java -jar coupon-eureka-1.0-SNAPSHOT.jar --spring.profiles.active=server3


f  上边步骤完成后,eureka 已经起来了,浏览器分别输入:http://server1:8001,  http://server2:8002,  http://server3:8003访问即可

 

2.2  Eureka-Server提供浏览器界面的说明:

 

 

 

 

 

System Status:系统状态信息,包含启动时间,当前时间,数据中心,环境

Ds Replicas:父本,说明该服务器从哪里同步数据,如上图,从server2和server3同步数据

Instances currently registered with Eureka:当前实例注册到eureka的信息(如上图,有三个server)

General Info:通用信息,关于eureka的一些信息采集信息

instance info:当前实例信息

 

3    其他内容
3.1  mvn涉及指令:
mvn clean package      #打包命令
-Dmaven.test.skip=true   #不执行测试用例,也不编译测试用例类
-U               #强制刷新本地仓库不存在release版和所有的snapshots版本
java -jar coupon-eureka-1.0-SNAPSHOT.jar #运行jar包
--spring.profiles.active=server1  #在执行java -jar命令时可以通过--spring.profiles.active=test的方式进行激活指定的profiles列表



4    引用博客

https://www.cnblogs.com/ceshi2016/p/6489477.html

https://www.cnblogs.com/shengulong/p/10589493.html

https://blog.csdn.net/u012817635/article/details/80189579

posted on 2021-01-10 10:35  菜鸟乙  阅读(162)  评论(0编辑  收藏  举报