微服务：SpringCloud 使用consul来代替eureka注册中心

女爷i 2023-02-12 11:28 227阅读 0赞

Consul  是  HashiCorp  公司推出的开源工具，用于实现分布式系统的服务发现与配置。与其它分布式服 务注册与发现的方案，Consul  的方案更 “ 一站式 ” ，内置了服务注册与发现框 架、分布一致性协议实 现、健康检查、Key/Value  存储、多数据中心方案，不再需要依赖其它工具（比如  ZooKeeper  等）。 使用起来也较 为简单。Consul  使用  Go  语言编写，因此具有天然可移植性 ( 支持 Linux 、 windows 和 Mac OS X)；安装包仅包含一个可执行文件，方便部署，与  Docker  等轻量级容器可无缝配合。

### 一、下载 ###

官网：[https://www.consul.io/downloads.html][https_www.consul.io_downloads.html]。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70][]

### 二、开启consul ###

我们可以下载windows版本的，然后呢，直接命令行启动就可以了

![20200526090602937.png][]

![2020052609074624.png][]

如果下面这样 就是启动成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 1][]

我们可以输入[http://localhost:8500/ui/dc1/services][http_localhost_8500_ui_dc1_services]，查看页面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 2][]

**consul给我们提供了一些api。比如：**

（1）注册服务：通过postman发送put请求到localhost:8500/v1/catalog/register地址可以完成服务

{
     "Datacenter": "dc1", 
     "Node": "node01", 
     "Address": "192.168.74.102",
     "Service": {
     "ID":"mysql-01",
     "Service": "mysql", 
     "tags": ["master","v1"], 
     "Address": "192.168.74.102",
     "Port": 3306
     }
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 4][]

但是由于是api注册的，进行心跳健康检查的时候，发现没有。

（2）服务查询：通过postman发送get请求到 localhost:8500/v1/catalog/services查看所有的服务列表

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 5][]

通过postman发送get请求到 localhost:8500/v1/catalog/service/服务名 查看具体的服务详情

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 6][]

（3）服务删除：通过postman发送put请求到localhost:8500/v1/catalog/deregister删除服务

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 7][]

### 三、微服务注册到consul ###

跟之前的基础项目是一样的

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 8][]

添加product\_service依赖

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-consul-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>

修改product\_service配置

server:
      port: 9001 #端口
    spring:
      application:
        name: service-product #服务名称
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/shop?useUnicode=true&characterEncoding=utf8
        username: root
        password: 111111
      jpa:
        database: MySQL
        show-sql: true
        open-in-view: true
      ###开始配置consul的服务注册
      cloud:
        consul:
          host: 127.0.0.1 #consul服务器的主机地址
          port: 8500 #consul服务器的端口有
          discovery:
            #是否需要注册
            register: true
            #注册的实例ID (唯一标志)
            instance-id: ${spring.application.name}-1
            #服务的名称
            service-name: ${spring.application.name}
            #服务的请求端口
            port: ${server.port}
            #指定开启ip地址注册
            prefer-ip-address: true
            #当前服务的请求ip
            ip-address: ${spring.cloud.client.ip-address}

直接启动项目

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 9][]

### 四、消费者调用提供者 ###

<dependencies>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.32</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-consul-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
        </dependencies>

server:
      port: 9002 #端口
    spring:
      application:
        name: service-order #服务名称
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/shop?useUnicode=true&characterEncoding=utf8
        username: root
        password: 111111
      jpa:
        database: MySQL
        show-sql: true
        open-in-view: true
      ###开始配置consul的服务注册
      cloud:
        consul:
          host: 127.0.0.1 #consul服务器的主机地址
          port: 8500 #consul服务器的ip地址
          discovery:
            #是否需要注册
            register: true
            #注册的实例ID (唯一标志)
            instance-id: ${spring.application.name}-1
            #服务的名称
            service-name: ${spring.application.name}
            #服务的请求端口
            port: ${server.port}
            #指定开启ip地址注册
            prefer-ip-address: true
            #当前服务的请求ip
            ip-address: ${spring.cloud.client.ip-address}

启动项目：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 10][]

成功！！！

![20200526101228443.png][]

源码：git@gitee.com:Zesystem/springclouddemoconsul.git

[https_www.consul.io_downloads.html]: https://www.consul.io/downloads.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200526090508590.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ==,size_16,color_FFFFFF,t_70
[20200526090602937.png]: https://img-blog.csdnimg.cn/20200526090602937.png
[2020052609074624.png]: https://img-blog.csdnimg.cn/2020052609074624.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200526090829982.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ==,size_16,color_FFFFFF,t_70
[http_localhost_8500_ui_dc1_services]: http://localhost:8500/ui/dc1/services
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200526090934852.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ==,size_16,color_FFFFFF,t_70
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[20200526101228443.png]: https://img-blog.csdnimg.cn/20200526101228443.png