Not able to send log4net logs to application insights - docker

Question

I have dotnetcore service which is running in Kubernetes. For logging, I have used the log4net. I am trying to send the logs of service to application-insights but the logs are not showing there.
I have added the below configuration in my service for application insights.
Runtime version: netcoreapp3.1 version-2.31.0.1
Hosting environment: Azure-cluster
app-service.csproj
<ItemGroup>
<PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.16.0" />
<PackageReference Include="Microsoft.ApplicationInsights.Log4NetAppender" Version="2.16.0" />
...
<ItemGroup>
log4net.config
...
<appender name="aiAppender" type="Microsoft.ApplicationInsights.Log4NetAppender.ApplicationInsightsAppender, Microsoft.ApplicationInsights.Log4NetAppender">
<InstrumentationKey name="AppInsightsKey" value="abcdefgh-abcd-abcd-abcd-abcdefghijkl" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message%newline"/>
</layout>
</appender>
startup.cs
public Startup(IConfiguration configuration)
{
Configuration = configuration;
Logger.ConfigureLog4Net("./logs/app.log", Configuration)
...
}
public void ConfigureServices(IServiceCollection services)
{
// The following line enables Application Insights telemetry collection.
services.AddApplicationInsightsTelemetry();
services.AddSingleton<ITelemetryInitializer, CloudRoleNameTelemetryInitializer>();
// This code adds other services for the application.
services.AddMvc();
...
}
CloudRoleNameTelemetryInitializer.cs
using System.Net;
using Microsoft.ApplicationInsights;
using Microsoft.ApplicationInsights.Channel;
using Microsoft.ApplicationInsights.Extensibility;
public class CloudRoleNameTelemetryInitializer : ITelemetryInitializer
{
public void Initialize(ITelemetry telemetry)
{
// set custom role name here
telemetry.Context.Cloud.RoleName = "app-service";
}
}
I have also added the APPINSIGHTS_INSTRUMENTATIONKEY environment variable for service. I am able to see the request information for service but not logs. Only 2 logs are showing in the log section of application-insights but it is not from the application(log4net).
No XML encryptor configured. Key {XXX-XXX-XXX-XXX-XXX} may be persisted to storage in unencrypted form.
Storing keys in a directory '/root/.aspnet/DataProtection-Keys' that may not be persisted outside of the container. Protected data will be unavailable when the container is destroyed.
Below are some links I have explored.
https://learn.microsoft.com/en-us/azure/azure-monitor/app/asp-net-trace-logs
https://medium.com/#muralimohan.mothupally/application-insights-integration-with-log4net-e1bef68fe3c8
https://blog.ehn.nu/2014/11/using-log4net-for-application-insights/
https://jan-v.nl/post/using-application-insights-in-your-log4net-application/
But still, logs are not adding in the application insights. Is there anything I am missing here? Also is it possible to add Console.WriteLine logs to application-insights as like in nodejs app we can send it by enabling the application-insights module's configuration? Can you please help me?
Thanks...

Answer 1

Thanks for Peter Drier's answer, I thinks below code he provided is useful to you.
For more details, you can refer the orgin post.
Log4Net and Application Insights-no data is coming through
<appender name="aiAppender" type="Microsoft.ApplicationInsights.Log4NetAppender.ApplicationInsightsAppender, Microsoft.ApplicationInsights.Log4NetAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message%newline" />
</layout>
<threshold value="INFO" />
<InstrumentationKey value="12345678-7946-1234-1234-8b330fbe1234" />
</appender>