如何获取NLog输出以显示在Azure功能的流日志中?

编程入门行业动态更新时间:2024-10-20 11:24:30

本文介绍了如何获取NLog输出以显示在Azure功能的流日志中?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我有一个简单的Azure功能，我希望能够在流日志窗口和Application Insights中监视日志输出.

I have a simple Azure Function and I'd like to be able to monitor log output in both the streaming log window and in Application Insights.

到目前为止，我能够在Application Insights中看到NLog输出，但在流窗口中却看不到.Microsoft ILogger输出在两者中都显示.

这是我到目前为止所做的:

Here's what I've done so far:

创建了基本的Azure测试功能
我从Azure门户启用了Application Insights
为该功能安装了 NLog 和 Microsoft.ApplicationInsights.NLogTarget nuget依赖项.
向该功能添加了代码，以编程方式创建Application Insights nlog目标.
在阅读完这些问题之后... 使用NLog进行Azure日志流和如何集成NLog将日志写入Azure流日志我还以编程方式添加了NLog TraceTarget，因为它们建议流日志机制仅显示跟踪输出流(不要与称为跟踪"的日志级别混淆！)
最后，我修改了 host.json ，将默认日志记录级别更改为"Trace".为了使流窗口显示Microsoft ILogger的跟踪级别的输出，这是必需的，而且我认为这可能是Nlog输出均未显示的原因...

Created a basic Azure test function
From the Azure portal, I enabled Application Insights
Installed NLog and Microsoft.ApplicationInsights.NLogTarget nuget dependencies for the function.
Added code to the function to programmatically create an Application Insights nlog target.
After reading these questions... Azure Log Streaming with NLog and How to integrate NLog to write log to Azure Streaming log I have also programmatically added an NLog TraceTarget since they suggest that the streaming log mechanism only displayed the Trace ouput stream (not to be confused with the log-level called 'Trace' !)
Finally, I have modified host.json to turn the default logging level up to "Trace". This is required in order for the streaming window to show Trace-level output for the Microsoft ILogger and I had thought it might be the reason none of the Nlog output was showing...

{ "version": "2.0", "logging": { "logLevel": { "default": "Trace" } } }

到目前为止，结果是:

所有Microsoft记录器输出均显示在流窗口和Application Insights日志中.
Nlog输出显示在Application Insights中，但否不会出现在流窗口中.

All Microsoft logger output is shown in both the streaming window and Application Insights log.
The Nlog output is shown in Application Insights but does NOT appear in the streaming window.

这是最终的功能代码...

Here is the final function code...

public static class Function1 { [FunctionName("LogTest")] public static void Run([TimerTrigger("0 */5 * * * *")] TimerInfo myTimer, ILogger log) { // Set up NLOG targets and logger var config = new LoggingConfiguration(); //send logging to application insights config.LoggingRules.Add( new LoggingRule("*", LogLevel.Trace, new ApplicationInsightsTarget())); //also try to log to Trace output //'RawWrite' is used to try and force output at all log-levels config.LoggingRules.Add( new LoggingRule("*", LogLevel.Trace, new TraceTarget {RawWrite = true})); LogManager.Configuration = config; var nlog = LogManager.GetLogger("Example"); //log using native log.LogInformation($"log:Info"); //appears in live-stream, app-insights log.LogError("log:Error"); //appears in live-stream, app-insights log.LogTrace("log:Trace"); //appears in live-stream, app-insights (after modifying host.json) //log using nlog nlog.Info("nlog:info"); //appears in ........... app-insights nlog.Error("nlog:error"); //appears in ........... app-insights nlog.Trace("nlog:trace"); //appears in ........... app-insights //say goodbye log.LogInformation("log:ending"); } }

在此先感谢您提出任何建议-毫无疑问，我缺少一些简单的步骤.

Thanks in advance for any suggestions - no doubt I'm missing some simple step.

推荐答案

感谢看来解决方案是使用 MicrosoftILoggerTarget 而不是 TraceTarget 配置新规则.

Thanks to the link provided by Rolf Kristensen it seems the solution is to configure a new rule using the MicrosoftILoggerTarget rather than the TraceTarget.

因此完整的代码是

var config = new LoggingConfiguration(); //ensure that log output is seen in the Streamed Log window config.LoggingRules.Add(new LoggingRule("*", LogLevel.Trace, new MicrosoftILoggerTarget(azureLog))); //ensure that log output is sent to Application Insights config.LoggingRules.Add(new LoggingRule("*", LogLevel.Trace, new ApplicationInsightsTarget())); LogManager.Configuration = config; var nlog = LogManager.GetLogger("Example"); nlog.Info("output from nlog");