Application insight not receiving Nlog for hosted service - azure-application-insights

Question

I try everything I can think of but I must miss something.
I have a hostedService project in netcoreapp3.1
I referenced the following
<PackageReference Include="Microsoft.ApplicationInsights.NLogTarget" Version="2.20.0" />
<PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.20.0" />
<PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.10" />
<PackageReference Include="NLog" Version="4.7.15" />
<PackageReference Include="NLog.Extensions.Logging" Version="1.7.4" />
my appsetting is as follow
{
"Logging": {
"LogLevel": {
"Default": "Warning",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Warning"
},
"ApplicationInsights": {
"LogLevel": {
"Default": "Warning",
"WorkerServiceTestLog": "Debug"
}
}
},
"ApplicationInsights": {
"InstrumentationKey": "XXX"
}
}
The nlog config look like that
<extensions>
<add assembly="Microsoft.ApplicationInsights.NLogTarget" />
</extensions>
<targets>
<target type="ApplicationInsightsTarget" name="aiTarget" >
</target>
<target type="Console" name="consolelog"/>
<target type="Debugger" name="debuglog" />
</targets>
<rules>
<logger name="*" minlevel="Debug" writeTo="debuglog" />
<logger name="*" minlevel="Debug" writeTo="consolelog" />
<logger name="*" minlevel="Debug" writeTo="aiTarget" />
</rules>
I build the host like that
var config = new ConfigurationBuilder()
.SetBasePath(System.IO.Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.Build();
return Host.CreateDefaultBuilder(args)
.ConfigureLogging(logging =>
{
logging.ClearProviders();
logging.AddNLog(config);
})
.ConfigureServices((hostContext, services) =>
{
services.AddHostedService<Worker>();
services.AddApplicationInsightsTelemetryWorkerService();
});
The worker simply test the logs
public class Worker : BackgroundService
{
private readonly NLog.ILogger _nlogger = LogManager.GetCurrentClassLogger();
private readonly ILogger<Worker> _logger;
public Worker(ILogger<Worker> logger)
{
_logger = logger;
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
for (var i = 0; i < 10; i++)
{
_logger.LogError("Microsoft Logging:Error");
_logger.LogInformation("Microsoft Logging:Information");
_nlogger.Error("NLOG:Error");
_nlogger.Info("NLOG:Information");
await Task.Delay(2000, stoppingToken);
}
}
}
Now I have all log information in the console and debugger as excepted
But only the log from Microsoft extension is going in application insight
What am I missing there?

Answer 1

Follow the workaround to fix the issue:
Startup.cs
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.AddRazorPages();
services.AddApplicationInsightsTelemetry(Configuration["APPLICATIONINSIGHTS_CONNECTION_STRING"]);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILogger<Startup> logger)
{
logger.LogInformation(
"Configuring for {Environment} environment",
env.EnvironmentName);
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapRazorPages();
});
}
}
Program.cs
public class Program
{
public static void Main(string[] args)
{
// Setting up the Nlog
var logger = LogManager.Setup()
.LoadConfigurationFromAppSettings()
.GetCurrentClassLogger();
try
{
logger.Debug("Nlog Log: init main");
CreateHostBuilder(args).Build().Run();
}
catch (Exception exception)
{
//NLog: catch setup errors
logger.Error(exception, " Nlog Log:Stopped program because of exception");
throw;
}
finally
{
// Ensure to flush and stop internal timers/threads before application-exit (Avoid segmentation fault on Linux)
NLog.LogManager.Shutdown();
}
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
})
//Configuring the Nlog
.ConfigureLogging(logging =>
{
logging.ClearProviders();
logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
})
.UseNLog()
//Calling the Host Services (Worker)
.ConfigureServices((hostContext, services) =>
{
services.AddHostedService<Worker>();
});
}
Here is my worker.cs
private readonly NLog.ILogger _nlogger = LogManager.Setup()
.LoadConfigurationFromAppSettings()
.GetCurrentClassLogger();
private readonly ILogger<Worker> _logger;
public Worker(ILogger<Worker> logger)
{
_logger = logger;
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
for (var i = 0; i < 10; i++)
{
_logger.LogError("Microsoft Logging:Error Iteration:" + i);
_logger.LogInformation("Microsoft Logging:Information Iteration:" + i);
_nlogger.Error("NLOG:Error Iteration:"+i);
_nlogger.Info("NLOG:Information Iteration:" + i);
await Task.Delay(2000, stoppingToken);
}
}
Result in Application Insights
Updated Answer:
Here you can see the Application Insights connection string get from secrect.json