How to disable InfluxDB console logs spamming journalctl in .NET 8.0 application running as systemd

Question

I am using InfluxDB.client in my .NET 8.0 worker application. When running the code using dotnet run, I do not get the logs below. When I compile it to a selfcontained application and run it using systemd on the controller it fills up the journalctl on the controller with these messages every time a datapoint is sent to the server:

Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: Flushing batches before shutdown.
Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: The data was successfully written to InfluxDB 2.
Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: The batch item: OnNext(RestSharp.RestResponse) was processed successfully.
Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: The WriteApi was disposed.
Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: The data was successfully written to InfluxDB 2.
Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: The batch item: OnNext(RestSharp.RestResponse) was processed successfully.
Sep 04 02:52:12 compulab-imx8mp TSLogger[1138]: The WriteApi was disposed.

Relevant InfluxDB Code:

string tokenInfluxDb = cabinetConfig.InfluxDb.Token;
string urlInfluxDb = cabinetConfig.InfluxDb.Url;
string org = cabinetConfig.InfluxDb.Org;
string bucket = cabinetConfig.InfluxDb.Bucket;

clientInfluxDb = new InfluxDBClient(urlInfluxDb, tokenInfluxDb);

var point = PointData
    .Measurement(item.Cage)
    .Field(item.MeasurementId, value)
    .Tag("sn", item.SerialNumber)
    .Timestamp(DateTime.UtcNow, WritePrecision.Ns);

LogToDb(point);

async void LogToDb(PointData point)
{
    using (var writeApi = clientInfluxDb.GetWriteApi())
    {
        writeApi.WritePoint(point, bucket, org);
    }
}

Worker.csproj:

<TargetFramework>net8.0</TargetFramework>
<PackageReference Include="InfluxDB.Client" Version="4.14.0" />

systemd service file:

[Unit]
Description=InfluxDBWorker

[Service]
ExecStartPre=/bin/sleep 30
WorkingDirectory=/home/usr/application/InfluxDBWorker
ExecStart=/home/usr/application/InfluxDBWorker/InfluxDBWorker
Restart=always
# Restart service after 60 seconds if the dotnet service crashes:
RestartSec=60
KillSignal=SIGINT
SyslogIdentifier=InfluxDBWorker
User=root
Environment=DOTNET_ENVIRONMENT=Production
Environment=DOTNET_PRINT_TELEMETRY_MESSAGE=false

[Install]
WantedBy=multi-user.target

I have tried setting different logging parameters to warning in Environment variables and in appsettings.json, but it seems like these are coming from elsewhere.

I tried setting ForwardToConsole=no in journald.conf.

I have not been able to disable this. I found this: https://github.com/influxdata/influxdb-client-csharp/issues/560 , but I could make it work.

Javier Carmona Gallegos · Accepted Answer · 2025-05-16 03:19:50Z

0

My problem:

I developed a .NET 8 rest API to register data on InfluxDB, so I deployed it on Ubuntu 24.X, After seeing the journalctl was spamming the syslog file, I tried to stop influx from writing logs, but the issue is Influxd or Influxdb weren't writing to syslog, it was the influx client for C#

My Solution Try adding this class:

using System.Diagnostics;
using InfluxDB.Client.Core;

namespace Services;

public static class InfluxDBTraceFilter
{
    public static void SuppressInfluxVerbose()
    {
        // Clear existing listeners to avoid conflicts
        Trace.Listeners.Clear();

        // Add a listener that filters out logs below Warning level
        Trace.Listeners.Add(new DefaultTraceListener
        {
            Filter = new EventTypeFilter(SourceLevels.Warning)
        });

        // Disable InfluxDB verbose logging explicitly
        Trace.AutoFlush = false;
        Trace.WriteLine("InfluxDB verbose logging suppressed.");
    }
}

Now on your Program.cs or Starup.cs add this line:

InfluxDBTraceFilter.SuppressInfluxVerbose();

#In my case it was on line 19 

var bld = WebApplication.CreateBuilder(args);

DotEnv.Load();

InfluxDBTraceFilter.SuppressInfluxVerbose();

also if you have appsettings.json files set this configuration

"Logging": {
    "LogLevel": {
      "Default": "Warning",
      "Microsoft.AspNetCore": "Warning",
      "InfluxDB.Client": "Warning"
    }

Then make your tests on your local verify everything and now you can deploy your app, my advice is to clear your syslog first to see a difference.

edited May 16 at 3:19

answered May 14 at 18:40

Javier Carmona Gallegos

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Community May 15 at 0:16

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