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.net core微服务之服务发现 - 六指狂魔肉球猫

 7 months ago
source link: https://www.cnblogs.com/AsprosL/p/18021312
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.net core微服务之服务发现

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一：nacos

　　https://nacos.io/docs/latest/what-is-nacos/

　　https://github.com/alibaba/nacos

二：consul

　　https://developer.hashicorp.com/consul/docs?product_intent=consul

　　https://github.com/hashicorp/consul

服务发现的框架常用的还有zookeeper eureka等，这里准备使用nacos

前置条件准备 docker，yaml

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使用docker启动mysql

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在数据库创建nacos数据库

https://github.com/alibaba/nacos/blob/master/config/src/main/resources/META-INF/nacos-db.sql

准备三个nacos

    nacos1:
        container_name: nacos1
        hostname: nacos1
        image: nacos/nacos-server
        environment:
            - MODE=cluster
            - PREFER_HOST_MODE=hostname
            - NACOS_SERVERS=nacos1:8848 nacos2:8848 nacos3:8848
            - SPRING_DATASOURCE_PLATFORM=mysql
            - MYSQL_SERVICE_HOST=172.0.10.3
            - MYSQL_SERVICE_PORT=3306
            - MYSQL_SERVICE_USER=root
            - MYSQL_SERVICE_PASSWORD=123456
            - MYSQL_SERVICE_DB_NAME=nacos
            - MYSQL_SERVICE_DB_PARAM=characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true  
            - JVM_XMS=128m
            - JVM_XMX=128m
            - JVM_XMN=128m
        volumes: 
            - ./nacos/cluster-logs/nacos1:/home/nacos/logs
            - ./nacos/init.d:/home/nacos/init.d
        ports: 
            - 8850:8848
            - 7850:7848     
            - 9870:9848
            - 9852:9849
        depends_on:
          - mysql
        networks:
          caseor_bridge:
                ipv4_address: 172.0.10.5

    nacos2:
        container_name: nacos2
        hostname: nacos2
        image: nacos/nacos-server
        environment:             
            - MODE=cluster
            - PREFER_HOST_MODE=hostname
            - NACOS_SERVERS=nacos1:8848 nacos2:8848 nacos3:8848
            - SPRING_DATASOURCE_PLATFORM=mysql
            - MYSQL_SERVICE_HOST=172.0.10.3
            - MYSQL_SERVICE_PORT=3306
            - MYSQL_SERVICE_USER=root
            - MYSQL_SERVICE_PASSWORD=123456
            - MYSQL_SERVICE_DB_NAME=nacos
            - MYSQL_SERVICE_DB_PARAM=characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true  
            - JVM_XMS=128m
            - JVM_XMX=128m
            - JVM_XMN=128m
        volumes: 
            - ./nacos/cluster-logs/nacos2:/home/nacos/logs
            - ./nacos/init.d:/home/nacos/init.d
        ports: 
            - 8849:8848
            - 7849:7848     
            - 9869:9848
            - 9851:9849
        depends_on:
          - mysql
        networks:
          caseor_bridge:
                ipv4_address: 172.0.10.6

    nacos3:
        container_name: nacos3
        hostname: nacos3
        image: nacos/nacos-server
        environment:             
            - MODE=cluster
            - PREFER_HOST_MODE=hostname
            - NACOS_SERVERS=nacos1:8848 nacos2:8848 nacos3:8848
            - SPRING_DATASOURCE_PLATFORM=mysql
            - MYSQL_SERVICE_HOST=172.0.10.3
            - MYSQL_SERVICE_PORT=3306
            - MYSQL_SERVICE_USER=root
            - MYSQL_SERVICE_PASSWORD=123456
            - MYSQL_SERVICE_DB_NAME=nacos
            - MYSQL_SERVICE_DB_PARAM=characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true  
            - JVM_XMS=128m
            - JVM_XMX=128m
            - JVM_XMN=128m
        volumes: 
            - ./nacos/cluster-logs/nacos3:/home/nacos/logs
            - ./nacos/init.d:/home/nacos/init.d
        ports: 
            - 8848:8848
            - 7848:7848     
            - 9848:9848
            - 9849:9849
        depends_on:
          - mysql
        networks:
          caseor_bridge:
                ipv4_address: 172.0.10.7

具体配置可以参考官网

查看nacos 控制台 http://127.0.0.1:8848/nacos/，http://127.0.0.1:8849/nacos/，http://127.0.0.1:8850/nacos/

620475-20240220092703950-1271541369.png

 可以看到集群已经搭建完成了

在.net core中使用nacos

https://github.com/nacos-group/nacos-sdk-csharp

nacos-sdk-csharp.AspNetCore
nacos-sdk-csharp.Extensions.Configuration

在appsettings.json中新增Nacos配置

  "Nacos": {
    "ServerAddresses": [ "http://192.168.110.39:8848" ],
    //命名空间GUID,public默认没有
    "Namespace": "779857e5-b517-437c-9026-f04c98d4bac1",
    // 配置中心
    "Listeners": [
      {
        "Group": "DEFAULT_GROUP",
        "DataId": "appsettings.json",
        "Optional": false
      }
    ],
    // 服务发现
    "ServiceName": "saas-system",
    "GroupName": "DEFAULT_GROUP"
  }
620475-20240220094831502-1192355566.png

 在program下新增

//读取nacos配置文件
builder.Host.UseNacosConfig("Nacos");
//注册服务到nacos
builder.Services.AddNacosAspNet(builder.Configuration, "Nacos");

在program下继续读取appsettings的配置信息，首选需要在nacos上的appsettings配置信息

620475-20240220095139668-833715409.png
620475-20240220095407168-1793885670.png

 启动该服务

dotnet run --urls=http://*:8083
dotnet run --urls=http://*:8084
dotnet run --urls=http://*:8085
620475-20240220095618294-1727837932.png
620475-20240220095653338-1760044951.png
620475-20240220095719839-1576738831.png

 在其他服务中调用当前服务接口

 [HttpGet("nacos.test")]
 public async Task<IActionResult> TestNacos()
 {
     var instance= await _namingService.SelectOneHealthyInstance("saas-system", "DEFAULT_GROUP");
     var host = $"{instance.Ip}:{instance.Port}";

     var baseUrl = instance.Metadata.TryGetValue("secure", out _)
         ? $"https://{host}"
         : $"http://{host}";

     var url = $"{baseUrl}/system/tenant.package.query.list";

     using HttpClient client = new();
     var result = await client.GetAsync(url);
     return Ok(await result.Content.ReadAsStringAsync());

 }
620475-20240220101136160-519651682.png

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