Example to show how to enable Logs in context using Serilog as logging provider for Microsoft.Extentions.Logging for more details read https://github.com/serilog/serilog-aspnetcore#inline-initialization

Logging configuration is controlled via appconfig.json in application . In this case the output is console / Container/ Kubernetes logs. The logs are injested using our infra agen kubernetes logging plugin

1. Kubernetes integration
2. Kubernetes logging plugin https://github.com/newrelic/kubernetes-logging
3. Sample aspnetcore application.

The code changes introduce serilog log provider and corresponding new relic enricher to format and enrich the microsoft extentions logs to be injested by new relic. Here is summary of code chnages required. There are multiple ways to enable this integration, we have tired to create one that requires minimal code changes as suggested in https://github.com/serilog/serilog-aspnetcore#inline-initialization

1. Nuget imports The .csproj file is updated with references to required nugets

   <PackageReference Include="NewRelic.LogEnrichers.Serilog" Version="1.0.0" />
   <PackageReference Include="NewRelic.Agent.Api" Version="8.21.34" />
   <PackageReference Include="Serilog.AspNetCore" Version="3.2.0" />
   <PackageReference Include="Microsoft.Extensions.Configuration" Version="3.1.3" />
   <PackageReference Include="Serilog.Settings.Configuration" Version="3.1.0" />
   

2. Program.cs modifications Add .UseSerilog() as shown below to the CreateDefaultBuilder function We are enabling logger conifgration to be pulled via hosting context, in this case appsettings.json.

   
   public static IHostBuilder CreateHostBuilder(string[] args) =>
       Host.CreateDefaultBuilder(args)
           .ConfigureWebHostDefaults(webBuilder =>
           {
               webBuilder.UseStartup();
           }).UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
               .ReadFrom.Configuration(hostingContext.Configuration)
               .Enrich.FromLogContext());
   

3. Configuring appsettings.json The configration for serilog to use Newrelic contect and target type is configured in this file

   {
    "Serilog": {
        "Using": [ 
            "Serilog.Sinks.Console",
            "Serilog.Sinks.File",
            "NewRelic.LogEnrichers.Serilog" 
        ],
        "MinimumLevel": "Debug",
        "Enrich": [ "WithNewRelicLogsInContext" ],
        "WriteTo": [
        {
            "Name": "Console",
            "Args": {
            "formatter": "NewRelic.LogEnrichers.Serilog.NewRelicFormatter, NewRelic.LogEnrichers.Serilog"
            }
        }
        ],
   
        "Properties": {
        "Application": "NewRelic Logging Serilog Example"
        },
   
        "LogLevel": {
        "Default": "Information",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information"
        }
    },
    "AllowedHosts": "*"
    }

*Skip to Step 4 is you want to just test deployment and not recreate image with custom settings

1. Local run Verify your app is showing the newrelic formatted output.

   dotnet run --project src/aspnetcore-docker-logging.csproj

2. Build docker image

   docker build -t aspnetcore-docker-logging .

3. Run docker image locally

   docker run --rm -it -e ASPNETCORE_ENVIRONMENT=Development -e ASPNETCORE_DETAILEDERRORS=1 -e NEW_RELIC_LICENSE_KEY=<> -p 8000:80 aspnetcore-docker-logging:latest

4. Kubernetes Run Kuberenetes logging plugin. Follow instructions here https://github.com/newrelic/kubernetes-logging Deployment

   • Run the app as a Kubernetes deployment/service (assuming you have local kube instance running)

     kubectl create -f deployment.yml

   • Running the following should give you url to access the app.

     minikube service list

   • Access few URLs to generate traffic

   • Check logs in Log UI/Insights

References

https://docs.newrelic.com/docs/logs/enable-logs/enable-logs/kubernetes-plugin-logs#kubernetes-plugin https://github.com/newrelic/kubernetes-logging https://github.com/newrelic/kubernetes-logginghttps://github.com/serilog/serilog-aspnetcore#inline-initialization