Nlog ASP.Net 具有弹性搜索目标的核心不起作用

Question

NLog.Config 弹性搜索目标：

<target name="elasticWrapper" xsi:type="BufferingWrapper" flushTimeout="5000">
<target xsi:type="ElasticSearch"
name="elastic"
connectionStringName="ElasticUrl"
index="logs-${date:format=yyyy.MM.dd}"
documentType="logevent"
includeAllProperties="true"
layout="${message}">       
</target>
</target>

弹性搜索目标的连接字符串名称属性用于从 appsettings.json 获取信息

appsettings.json 如下所示

{
"Logging": {
"IncludeScopes": false,
"LogLevel": {
"Default": "Debug",
"System": "Information",
"Microsoft": "Information"
}
},
"ConnectionStrings": {
"ElasticUrl": "http://XXXXXX-XXXXXX:9200"
}
}

程序.cs 来自 .Net Core 项目

的文件，如下所示

public static void Main(string[] args)
{
var config = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.Build();
NLogBuilder.ConfigureNLog("nLog.config");
foreach (var setting in config.GetChildren().ToDictionary(x => x.Key, x => x.Value))
{
LogManager.Configuration.Variables[setting.Key] = setting.Value;
}
var logger = LogManager.GetCurrentClassLogger();  
var host = WebHost.CreateDefaultBuilder(args)                   
.UseContentRoot(Directory.GetCurrentDirectory())
.UseNLog()  
.Build();
host.Run();     
}

Answer 1

尝试更改一些内容

1. 添加文件目标以查看您的配置是否被 Nlog 识别。
2. 将 Nlog.config 重命名为 nlog.config，并将文件属性值标记为始终复制到输出目录。
3. 确保已将 NLog.Targets.ElasticSearch nuget 包添加到项目中。

我个人在容器内使用我的应用程序。因此，我将整个设置移动到代码中，并使用非常适合我的环境变量设置它们的值。

如果您的问题仍然存在，请告诉我。我将提供代码来通过代码配置 nlog。

Answer 2

我已经设法让它以编程方式工作。

public static void Main(string[] args)
{
var config = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.Build();
var logFactory = LogManager.LoadConfiguration("nLog.config");
foreach (var setting in config.GetChildren().ToDictionary(x => x.Key, x => x.Value))
{
logFactory.Configuration.Variables[setting.Key] = setting.Value;
}
var target = logFactory.Configuration.FindTargetByName("elastic") as ElasticSearchTarget;
target.Uri = config.GetConnectionString("ElasticUrl");
NLogBuilder.ConfigureNLog("nLog.config");
var logger = LogManager.GetCurrentClassLogger();  
var host = WebHost.CreateDefaultBuilder(args)                   
.UseContentRoot(Directory.GetCurrentDirectory())
.UseNLog()  
.Build();
host.Run();     
}

Answer 3

扩展@Sahadevan答案。

如果您使用的是 BufferingWrapper，则 findTargetByName 需要是一个 2 步过程。

var target = logFactory.Configuration.FindTargetByName("elastic") as BufferingTargetWrapper;
var esTarget = target.WrappedTarget as ElasticSearchTarget;

示例配置：

<target xsi:type="BufferingWrapper" name="elastic"
flushTimeout="5000">
<target xsi:type="ElasticSearch"
includeAllProperties ="true">
</target>
</target>