Exclude specific endpoint serilog logging using aspnet core

Question

We have an aspnetcore application and we have a healthcheck that makes request to an endpoint every x seconds. Our API is using serilog, logging level information which log each request made to the API.

My question is: How can we filter to exclude from log requests made to a specific endpoint?

Just for example this is our logging code today:

        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
                .Enrich.FromLogContext()                    
                .Filter.ByExcluding(c => c.MessageTemplate.Text.Contains("Request"))
                .WriteTo.Console()
                .WriteTo.RollingFile(hostingContext.Configuration["log-path"]))                    
            .Build();

Today we can only filter all requests. How do we filter a specific endpoint request?

Jafin · Accepted Answer · 2018-11-21 03:10:20Z

23

I found the way to do this.

Instead of Exclude by MessageTemplate, I excluded by Property Value.

The filter is like this:

Filter.ByExcluding(c => c.Properties.Any(p => p.Value.ToString().Contains("swagger")))

In the end the code should look like this:

WebHost.CreateDefaultBuilder(args)
    .UseStartup<Startup>()
    .UseSerilog((hostingContext, loggerConfiguration) => loggerConfiguration
        .Enrich.FromLogContext()                  
        .Filter.ByExcluding(c => c.Properties.Any(p => p.Value.ToString().Contains("swagger")))
        .WriteTo.Console()
        .WriteTo.RollingFile(hostingContext.Configuration["log-path"]))                    
    .Build();

Hope this helps someone as helped me!

edited Nov 21, 2018 at 3:10

Jafin

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answered Aug 9, 2018 at 18:18

Rafael Miceli

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1 Comment

Bruno Over a year ago

Hi, can you give an example of a Log.Info call that would get ignored because of this? I am not sure to understand

Bo Ngoh · Accepted Answer · 2024-12-19 08:21:56Z

0

I had a very similar situation (don't want to be logging all Health queries), and found the solution on the official documentation itself: https://github.com/serilog/serilog-expressions

It's like your result, although yours didn't work for me; but their solution is entirely defined by a string so no idea how I would tweak it as a power user, but it worked just fine for my purposes.

The specific piece of code is this:

.Filter.ByExcluding("RequestPath like '%/health%'")

answered Dec 19, 2024 at 8:21

Bo Ngoh

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Comments

SerjG · Accepted Answer · 2025-08-22 06:47:23Z

In case you are talking about UseSerilogRequestLogging there is an article from Andrew Lock: https://andrewlock.net/using-serilog-aspnetcore-in-asp-net-core-3-excluding-health-check-endpoints-from-serilog-request-logging/#customising-the-log-level-used-for-serilog-request-logs

My code sample is

app.UseSerilogRequestLogging(options =>
{
    // Log all requests but skip /health and /metrics requests
    options.GetLevel = (httpContext, _, ex) => ex == null
        ? httpContext.Request.Path.Value?.StartsWith("/health") == true || httpContext.Request.Path.Value?.StartsWith("/metrics") == true
            ? LogEventLevel.Debug
            : LogEventLevel.Information
        : LogEventLevel.Error;
    options.EnrichDiagnosticContext = (diagnosticContext, httpContext) =>
    {
        if (httpContext.Request.Host.Value is not null)
            diagnosticContext.Set("RequestHost", httpContext.Request.Host.Value);
        diagnosticContext.Set("RequestScheme", httpContext.Request.Scheme);
    };
});

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