04-Zookeeper

本笔记来源于：尚硅谷SpringCloud框架开发教程(SpringCloudAlibaba微服务分布式架构丨Spring Cloud)
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文章来自：
https://github.com/OT-mt/cloud2020/tree/master/springcloud-2%E5%B0%9A%E7%A1%85%E8%B0%B7%E5%91%A8%E9%98%B3-2020

脑图

本地：
尚硅谷SpringCloud

在线：
尚硅谷SpringCloud

配置虚拟机和zookeeper

1. 虚拟机终端输入ifconfig查看 ens33 下的端口号
2. 查看主机与虚拟机之间通信是否畅通
   1. 虚拟机端口号：ifconfig查看 ens33 下的端口号
   2. 主机端口号：网络连接下的 VMnet8 的端口号
   3. 使用虚拟机ping主机，使用主机ping虚拟机确保都可以ping通
3. 新建项目
   1. pom

      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
      </dependency>

4. 解压zookeeper
   tar -zxvf zookeeper-3.4.10.tar.gz
5. 启动 zookeeper
   ==注意此时应该修改conf里的zoo_sample.cfg名字为zoo.cfg==
   [root@localhost ~]# cd /usr/local/zookeeper/zookeeper-3.4.14/bin
   [root@localhost bin]# ./zkServer.sh start
6. 启用端口
   [root@localhost bin]# ./zkCli.sh
   Connecting to localhost:2181

   新建项目

   pom文件

   ==注意：==
7. 排除zookeeper-discovery中自带的 zookeeper，同时引入与linux相同版本的 zookeeper
8. 排除引入 zookeeper 的日志，因为日志会会冲突

   <dependencies>
       <!--引入自己的公共api-->
       <dependency>
           <groupId>com.wxh.springcloud</groupId>
           <artifactId>cloud-api-commons</artifactId>
           <version>${project.version}</version>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-actuator</artifactId>
       </dependency>
       <!--热部署-->
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-devtools</artifactId>
           <scope>runtime</scope>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.projectlombok</groupId>
           <artifactId>lombok</artifactId>
           <optional>true</optional>
       </dependency>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-test</artifactId>
       </dependency>
       <dependency>
           <groupId>org.springframework.cloud</groupId>
           <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
           <!-- 排除自身的zookeeper        -->
           <exclusions>
               <exclusion>
                   <groupId>org.apache.zookeeper</groupId>
                   <artifactId>zookeeper</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
       <!-- 添加zookeeper,与linux上的版本一致     -->
       <dependency>
           <groupId>org.apache.zookeeper</groupId>
           <artifactId>zookeeper</artifactId>
           <version>3.4.14</version>
           <exclusions>
               <exclusion>
                   <groupId>log4j</groupId>
                   <artifactId>log4j</artifactId>
               </exclusion>
               <exclusion>
                   <groupId>org.slf4j</groupId>
                   <artifactId>slf4j-log4j12</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
   </dependencies>

yml 文件

server:
  port: 8004

spring:
  application:
    name: cloud-provider-payment
  cloud:
    zookeeper:
      # ip地址为linux中的网络接口，2181为zookeeper的默认端口
      connect-string: 192.168.150.66:2181

linux测试

[zk: localhost:2181(CONNECTED) 3] ls /services
[cloud-provider-payment]

能看到服务名即为配置成功

测试2

1. http://localhost:8004/payment/zk
   可以看到信息
2. linux

   # 获取服务名
   [zk: localhost:2181(CONNECTED) 0] ls /services
   [cloud-provider-payment]
   # 获取流水号
   [zk: localhost:2181(CONNECTED) 1] ls /services/cloud-provider-payment
   [efc76371-522d-4d5d-8f56-f8fe4deb7a47]
   # 获取详细信息
   [zk: localhost:2181(CONNECTED) 2] get /services/cloud-provider-payment/efc76371-522d-4d5d-8f56-f8fe4deb7a47
   {"name":"cloud-provider-payment","id":"efc76371-522d-4d5d-8f56-f8fe4deb7a47","address":"WINDOWS-N0GUAG7","port":8004,"sslPort":null,"payload":{"@class":"org.springframework.cloud.zookeeper.discovery.ZookeeperInstance","id":"application-1","name":"cloud-provider-payment","metadata":{}},"registrationTimeUTC":1590232919360,"serviceType":"DYNAMIC","uriSpec":{"parts":[{"value":"scheme","variable":true},{"value":"://","variable":false},{"value":"address","variable":true},{"value":":","variable":false},{"value":"port","variable":true}]}}

   服务节点是临时还是持久

   关闭8004后在linux终端中,一段时间后失去连接

   [zk: localhost:2181(CONNECTED) 18] ls /services/cloud-provider-payment
   [efc76371-522d-4d5d-8f56-f8fe4deb7a47]
   [zk: localhost:2181(CONNECTED) 19] ls /services/cloud-provider-payment
   [efc76371-522d-4d5d-8f56-f8fe4deb7a47]
   [zk: localhost:2181(CONNECTED) 20] ls /services/cloud-provider-payment
   [efc76371-522d-4d5d-8f56-f8fe4deb7a47]
   [zk: localhost:2181(CONNECTED) 21] ls /services/cloud-provider-payment
   []
   [zk: localhost:2181(CONNECTED) 22] 

   再开启8004，再次查看流水号可以发现流水号跟之前的不一样 ，所以服务节点是临时的，在关闭服务后完全删除。

   订单服务入住zookeeper

3. 新建订单 moudle
4. 该pom
5. 建yml

   server:
     port: 80
   spring:
     application:
       name: cloud-consumerzk-order80
     cloud:
       zookeeper:
         connect-string: 192.168.150.66:2181

6. 写主类
7. 配置类生成 RestTemplate
8. Controller 调用 8004
9. linux 输入，查看节点是否注册上

   [zk: localhost:2181(CONNECTED) 1] ls /services
   [cloud-provider-payment, cloud-consumerzk-order80]

10. 网址登陆查看
    http://localhost:8004/payment/zk
    http://localhost/consumer/payment/zk

存在问题

zookeeper集群?????????