C#中使用NEST库连接到Elasticsearch集群的正确方式是什么？

docker run -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:7.17.5

Install-Package NEST -Version 7.17.5

using Nest;

var settings = new ConnectionSettings(new Uri("http://localhost:9200"))
    .DefaultIndex("default_index"); // 设置默认索引

var client = new ElasticClient(settings);

// 测试连接
var pingResponse = client.Ping();
if (!pingResponse.IsValid)
{
    throw new Exception("连接失败：" + pingResponse.DebugInformation);
}
Console.WriteLine("连接成功！节点版本：" + pingResponse.ApiCall.ApiVersion);

var uris = new[]
{
    new Uri("http://node1:9200"),
    new Uri("http://node2:9200"),
    new Uri("http://node3:9200")
};

var pool = new StaticConnectionPool(uris); // 静态节点连接池
var settings = new ConnectionSettings(pool)
    .SniffOnStartup(false) // 禁用启动时嗅探
    .SniffOnConnectionFault(false) // 禁用故障嗅探
    .EnableHttpCompression() // 启用HTTP压缩
    .RequestTimeout(TimeSpan.FromSeconds(30)); // 请求超时设置

// Basic认证
var settings = new ConnectionSettings(new Uri("https://secured-cluster:9200"))
    .BasicAuthentication("admin", "securepassword123")
    .ServerCertificateValidationCallback((sender, cert, chain, errors) => true) // 跳过证书验证（生产环境需谨慎）
    .DefaultIndex("secure_index");

// 创建日志文档模型
public class LogEntry
{
    public DateTime Timestamp { get; set; }
    public string Level { get; set; }
    public string Message { get; set; }
}

var log = new LogEntry
{
    Timestamp = DateTime.UtcNow,
    Level = "INFO",
    Message = "用户登录成功"
};

// 异步写入文档
var indexResponse = await client.IndexDocumentAsync(log);
if (!indexResponse.IsValid)
{
    // 处理写入失败逻辑
    Console.WriteLine($"写入失败：{indexResponse.DebugInformation}");
}

var searchResponse = client.Search<Product>(s => s
    .Index("products")
    .Query(q => q
        .Match(m => m
            .Field(f => f.Name)
            .Query("智能手机")
            .Fuzziness(Fuzziness.Auto)
        )
    )
    .Highlight(h => h
        .Fields(f => f
            .Field(p => p.Name)
            .PreTags("<em>")
            .PostTags("</em>")
        )
    )
);

// 处理搜索结果
foreach (var hit in searchResponse.Hits)
{
    Console.WriteLine($"得分：{hit.Score} 商品：{hit.Source.Name}");
    foreach (var highlight in hit.Highlight["name"])
    {
        Console.WriteLine($"高亮内容：{highlight}");
    }
}

settings.DefaultFieldNameInferrer(p => p); // 保持字段名称原样
settings.DisableDirectStreaming(); // 调试时启用原始请求查看