I have a question relating the configuration of Serilog by appSettings.json.
My project is a console application, based on .Net Core 3.0.
I tried to setup Serilog in order to write log information to the console and to a log file.
When I configure everything within my code itself - everything works like expected.
But when I try to import the Serilog configuration settings from an appsettings.json file, I have the problem, that my ConsoleSink works fine, but my FileSink not.
Here is, what I wrote into my appsettings.json:
{
"Serilog": {
"Using": [ "Serilog.Sinks.File", "Serilog.Sinks.Console" ],
"MinimumLevel": "Debug",
"WriteTo": [
{
"Name": "File",
"Args": { "pathFormat": "Xlog.txt" }
},
{ "Name": "Console" }
]
}
}
And this is the associated code:
IConfiguration configSerilog = new ConfigurationBuilder()
.AddJsonFile("appsettings.json", true, true)
.Build();
log = new LoggerConfiguration()
.ReadFrom.Configuration(configSerilog)
.CreateLogger();
log.Information("Initializing Serilog....");
My 'test-log-message' get's displayed in my console window, but I didn't get a logfile.
As I mentioned, it works, when I configure the Serilog in my code itself, rather than by the appsettings.
So, I do have the appropriate access rights to create a file.
Any ideas or hints?
Make sure that file proprieties for appsettings.json, property "Copy to Output Directory" is "Copy always" or "Copy if Newer".
And update youe configration as below (pathFormat in Args shoud be path)
{
"Serilog": {
"Using": [ "Serilog.Sinks.File", "Serilog.Sinks.Console" ],
"MinimumLevel": "Debug",
"WriteTo": [
{
"Name": "File",
"Args": { "path": "Xlog.txt" }
},
{ "Name": "Console" }
]
}
}
Related
I'm trying to log my events in two different files based on the global minimum level set in the logger:
>= Debug to a debug file
>= Information to another file.
I control the minimum level through Dynamic Level and some logic in my app.
In my json config file, I can use the "restrictedToMinimumLevel" in each sink to set the debug events to a specific file (see example below)
But Info events will be copy in the Debug file even if the minimum level has been set to Information globally because the sink is set to minimum debug.
What I'm looking for is to not write anything to the debug sink if the minimum global level is being set to Information (MinimumLevel.ControlledBy())
If I don't choose to log debug, I don't want a debug file to be created basically...
Is it possible to set up such filters/logic in the json file ?
Thank you for your help
{
"Serilog": {
"Using": [ "Serilog.Sinks.File" ],
"WriteTo": [
{
"Name": "File",
"Args": {
"path": "Logs/EventsLog.txt",
"rollingInterval": "Day",
"retainedFileCountLimit": 31,
"buffered": false,
"outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{Level:u3}] {Message:lj} {NewLine}{Exception}",
"restrictedToMinimumLevel": "Information"
}
},
{
"Name": "File",
"Args": {
"path": "Logs/DebugLog.txt",
"rollingInterval": "Day",
"retainedFileCountLimit": 2,
"buffered": false,
"outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{Level:u3}] {Message:lj} {Properties} {ThreadId} {ThreadName}{NewLine}{Exception}",
"restrictedToMinimumLevel": "Debug"
}
}
],
"Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId", "WithThreadName" ]
}
}
Can anyone tell me how to get the value from an appsettings.json file in my program.cs file in a Blazor (core 5) App.
Basically just need to write the "var seqUrl =" correctly. I think.
Please and thank you.
In my Main method of Program.cs I have
IConfiguration configuration = new ConfigurationBuilder()
.AddJsonFile("appsettings.json", false, true)
.AddJsonFile("appsettings.Development.json", true, true)
.Build();
var levelSwitch = new LoggingLevelSwitch();
var seqUrl = configuration.GetSection("SeriLog").GetSection("WriteTo").GetSection("Name:Seq").GetSection("Args").GetSection("serverUrl").Value;
Log.Logger = new LoggerConfiguration()
.ReadFrom.Configuration(configuration)
.MinimumLevel.ControlledBy(levelSwitch)
.WriteTo.Seq(seqUrl,
apiKey: "xxxxxxxxxxxx",
controlLevelSwitch: levelSwitch)
.CreateLogger();
My appsettings.json looks like this.
"SeriLog": {
"Using": [
"Serilog.Sinks.File",
"Serilog.Sinks.Seq",
"Serilog.Sinks.Console"
],
"MinimumLevel": {
"Default": "Information",
"Override": {
"Microsoft": "Warning",
"system": "Warning"
}
},
"Enrich": [ "WithMachineName", "WithEnvironmentUserName", "WithClientIp", "WithClientAgent", "WithEnvironmentName", "WithProcessId", "WithProcessName", "WithThreadId" ],
"WriteTo": [
{
"Name": "File",
"Args": {
"path": "C:\\Temp\\Logs\\JsonLog.json",
"formatter": "Serilog.Formatting.Json.JsonFormatter, Serilog",
"rollingInterval": "Day"
}
},
{
"Name": "Seq",
"Args": {
"serverUrl": "http://xxxxxxxxxxx"
}
}
]
I think you should consider restructuring the JSON in your appsettings file. The value for "WriteTo" is an array, but I would make it just an object rather than an array, then each element should be a child object. Use the "Name" variable to name them. Like this:
"WriteTo": {
"File": {
"Args": {
"path": "C:\\Temp\\Logs\\JsonLog.json",
"formatter": "Serilog.Formatting.Json.JsonFormatter, Serilog",
"rollingInterval": "Day"
}
},
"Seq": {
"Args": {
"serverUrl": "http://xxxxxxxxxxx"
}
}
}
Then you should be able to retrieve the values using the same style that you are, just with the complete path to the variable you need. For example:
var seqUrl = configuration.GetSection("SeriLog:WriteTo:Seq:serverUrl").Value;
I don't remember if this syntax is 100% correct or not (the path might not be colon separated, I'm not completely sure) but this concept should work. You just weren't entering the correct names into the .GetSection() method in your code, and I think it gets kind of tricky when you are trying to retrieve an array element like this, hence my suggestion to convert from array to a simple object.
I'm developing an application using asp.net core and Serilog for logging.
I have the following code:
Log.Information("Application Starting.");
Log.Information("Message: fetching all Requests");
My Serilog config file look like this:
{
"Serilog": {
"Using": [ "Serilog.Settings.Configuration" ],
"MinimumLevel": {
"Default": "Information",
"Override": {
"System": "Warning",
"Microsoft": "Warning"
}
},
{
"Name": "Logger",
"Args": {
"configureLogger": {
"Filter": [
{
"Name": "ByIncludingOnly",
"Args": {
}
}
],
"WriteTo": [
{
"Name": "File",
"Args": {
"path": "..\\Logs\structuredLog.json",
"formatter": "Serilog.Formatting.Json.JsonFormatter, Serilog",
"fileSizeLimitBytes": 20485760
}
}
],
"Enrich": [
"FromLogContext",
"WithMachineName",
"WithProcessId",
"WithThreadId"
],
"Properties": {
"ApplicationName": "Serilog.WebApplication"
}
}
}
}
]
}
The Problem:
As an output i get an invalid JSON file:
{"Timestamp":"2021-07-27T10:09:41.9531148+02:00","Level":"Information","MessageTemplate":"Application Starting."}
{"Timestamp":"2021-07-27T10:09:46.7538684+02:00","Level":"Information","MessageTemplate":"Message: fetching all Requests"}
I expect to get something like this:
[
{
"Timestamp":"2021-07-27T10:09:41.9531148+02:00",
"Level":"Information",
"MessageTemplate":"Application Starting."
},
{
"Timestamp":"2021-07-27T10:09:46.7538684+02:00",
"Level":"Information",
"MessageTemplate":"Message: fetching all Requests"
}
]
Can someone please help me to solve this problem!
You are correct with the statement that the JSON file is not a valid JSON object. In the context of a logging library the output should not be seen as a file but a stream of data. So each log entry is one item in a possibly never ending flow.
This is also why it makes no sense to add an opening array indicator and adding comma after each line.
After I generate the json log, I can adjust the format by using the format that comes with vs.
Format shortcut: Ctrl+K or Ctrl+D.
If it doesn't work, do it like this：
Result:
I'm trying to use Serilog in a dotnet webapi app. I need logging to go to both the Console and a Rolling log file.
Everything is coming out to the Console but nothing is appearing in the rolling log file and I'm not getting any errors anywhere.
I have setup serilog in my code like so:
// in program.cs Main
var configuration = new ConfigurationBuilder()
.SetBasePath(BASEDIR)
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.Build();
Log.Logger = new LoggerConfiguration()
.ReadFrom.Configuration(configuration)
.Enrich.FromLogContext()
.Enrich.With(new ThreadIdEnricher())
.CreateLogger();
// startup.cs Configure
app.UseSerilogRequestLogging();
And in appsetting.json I have
{
"Serilog": {
"Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
"Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ],
"MinimumLevel": {
"Default": "Information",
"Override": {
"Microsoft.AspNetCore.Mvc.Internal": "Warning",
"Microsoft.AspNetCore.Authentication": "Warning",
"Microsoft.AspNetCore": "Warning",
"Microsoft": "Warning",
"System": "Warning"
}
},
"WriteTo": [
{
"Name": "Async",
"Args": {
"configure": [
{
"Name": "Console",
"Args": {
"outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss} {Level:u1} TID:{ThreadId} {Message:lj}{NewLine}{Exception}",
"theme": "Serilog.Sinks.SystemConsole.Themes.SystemConsoleTheme::Literate, Serilog.Sinks.Console"
}
}
]
}
},
{
"Name": "Async",
"Args": {
"configure": [
{
"Name": "RollingFile",
"Args": {
"pathFormat": "c:\\logs\\{Date}.log",
"outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss} {Level:u1} TID:{ThreadId} {Message:lj}{NewLine}{Exception}",
"buffered": false,
"rollingInterval": "Serilog.RollingInterval.Day, Serilog.Sinks.File",
"retainedFileCountLimit": 7
}
}
]
}
}
]
}
}
have you tried to change to static file name? does the path exists? it seems that the configuration on the readme from their github page is a bit differnt from yours: https://github.com/serilog/serilog-sinks-file#user-content-json-appsettingsjson-configuration:~:text=node%2C%20%3A-,%7B,%7D,-See%20the%20XML
also maybe try to work your way back from setting it up in code then move back to config file?
I'd like to produce a log file that contains only log output from a particular EventId (or EventIds). Is such functionality supported?
If you plug in Serilog as the provider, you can continue logging through Microsoft.Extensions.Logging but apply Serilog's filtering to limit what is sent to the log file.
To do that you'd use the following Serilog configuration:
Log.Logger = new LoggerConfiguration()
.Filter.ByIncludingOnly("EventId.Id = 9")
.WriteTo.RollingFile("logs/log-{Date}.txt")
.CreateLogger();
(Where 9 is whatever event id you want to include.)
You can plug in Serilog with https://github.com/serilog/serilog-aspnetcore, and to compile this example you'll also need to install the Serilog.Sinks.RollingFile and Serilog.Filters.Expressions packages.
If you want to config Serilog using the appsettings file you can use something like this:
"Serilog": {
"Using": ["Serilog.Sinks.File", "Serilog.Settings.Configuration", "Serilog.Expressions"],
"MinimumLevel": {
"Default": "Debug"
},
"WriteTo": [{
"Name": "File",
"Args": {
"path": "log.txt",
"rollingInterval": "Day",
"retainedFileCountLimit": "120",
"rollOnFileSizeLimit": "true",
"theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console"
}
}
],
"Filter": [{
"Name": "ByIncludingOnly",
"Args": {
"expression": "EventId.Id = 101"
}
}
]
}
In the using field you have to put all Serilog package that you are importing, then config a sink for writing the logs and finally define a filter.
I almost spent a whole morning trying to achive that so I hope it helps you