.NetCore中Elasticsearch组件NEST的使用

1. 安装Docker

# 安装Docker
curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
# 安装完Docker后，打开阿里云，使用阿里提供的镜像加速服务，下面有执行代码，直接拷贝到Linux执行即可。

2. 安装 Elasticsearch

# 创建网络（应该是Kibana使用的）
docker network create elastic
# 拉取镜像
docker pull docker.elastic.co/elasticsearch/elasticsearch:7.14.0

docker run     --name es-demo     --net elastic     -d     -p 19200:9200     -p 19300:9300     -e "discovery.type=single-node"     docker.elastic.co/elasticsearch/elasticsearch:7.14.0

3. 安装NEST组件

使用方式直接看NEST项目的文档

3. 连接配置

• 配置文件

  {
    "Logging": {
      "LogLevel": {
        "Default": "Information",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
      }
    },
    "AllowedHosts": "*",
    "ElastictsearchOptions": {
      "Urls": [
        "http://localhost:8001",
        "http://localhost:8002",
        "http://localhost:8003",
        "http://localhost:8004"
      ]
    }
  }
  
  

• 注入配置

      /// <summary>
      /// Elasticsearch 配置类
      /// </summary>
      public class ElastictsearchOptions
      {
          public List<Uri> Urls { get; set; }
      }
  

         public void ConfigureServices(IServiceCollection services)
          {
              services.Configure<ElastictsearchOptions>(Configuration.GetSection(nameof(ElastictsearchOptions)));
              services.AddSingleton<IESService, ESService>(); 
          }
  

• Elasticsearch服务实现类

  /// <summary>
  /// Elasticsearch 服务
  /// </summary>
  public class ESService : IESService
  {
      private ElasticClient ESClient { get; }
  
      #region 依赖注入
          public ESService(IOptionsMonitor<ElastictsearchOptions> esOptionsMonitor)
      {
          ElastictsearchOptions option = esOptionsMonitor.CurrentValue;
          var urls = new StaticConnectionPool(option.Urls);
          var settings = new ConnectionSettings(urls);
          ESClient = new ElasticClient(settings);
      }
      #endregion
  }
  

• 上层应用使用

  // 直接注入IESService使用
  

.NetCore中Elasticsearch组件NEST的使用