[英]Serilog not writing to File (.net core 2.2)
我正在编写一个使用 Serilog 的 Web 服务。 我在获取要写出的文件时遇到问题(但控制台日志记录有效)。 我注意到当 .net core 2.0 基于这个和这个页面的解释出来时,设置发生了变化。
但是,现在,我看不到任何日志记录(也许过去默认的 M$ 记录器实际上就是我所看到的)。
以下是program.cs
的设置方式:
public class Program
{
public static IConfiguration Configuration { get; } = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT")}.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables()
.AddUserSecrets<Startup>()
.Build();
public static int Main(string[] args)
{
Log.Logger = new LoggerConfiguration()
.ReadFrom.Configuration(Configuration.GetSection("Serilog"))
.CreateLogger();
try
{
Log.Information("Starting webhost...");
BuildWebHost(args).Run();
return 0;
}
catch (Exception ex)
{
Log.Fatal(ex, "Host terminated unexpectedly");
return 1;
}
finally
{
Log.CloseAndFlush();
}
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseConfiguration(Configuration)
.UseSerilog()
.Build();
}
我的 appsettings.json 在根目录中有这个部分:
"Serilog": {
"Using" : ["Serilog.Sinks.Console", "Serilog.Sinks.File"],
"MinimumLevel": {
"Default": "Debug",
"Override": {
"Microsoft": "Warning",
"System": "Warning"
},
"Enrich" : ["FromLogContext"],
"WriteTo": [
{"Name": "Console" },
{"Name": "Debug" },
{"Name": "File", "Args": {"path": "%LogDir%\\sampleapp\\log-{Date}.txt", "rollingInterval": "Day", "shared": true } }
]
},
"Properties": {
"Application": "sampleapp"
}
},
请注意, %LogDir%
是我机器上的环境变量,在其他应用程序中也能正常解析。 该路径已创建,并且 Logs 文件夹对此应用程序使用的凭据具有完全 RW 权限。
我这样称呼日志记录...
private readonly ILogger<PartnerController> _logger;
private readonly IPartnerDao _partnerDao;
public PartnerController(ILogger<PartnerController> logger, IPartnerDao partnerDao)
{
_logger = logger;
_partnerDao = partnerDao;
}
[HttpGet]
[Route("{titleCode}")]
public async Task<IActionResult> Get(string titleCode)
{
_logger.LogInformation("Test logging");
}
然而,在运行服务时, ASP.NET Core Web Server
窗口中没有显示任何内容,也没有在我的机器上创建文件。
我错过了一些明显的东西吗?
结果我错误地从文档中复制了一些 JSON。 很难说,但在最初的问题中,我实际上在MinimumLevel
部分中嵌入了Enrich
、 WriteTo
和Properties
部分。
显然,这阻止了 Serilog 正确知道要写入哪个接收器。
这是我更正的设置 JSON:
"Serilog": {
"Using": ["Serilog.Sinks.Console", "Serilog.Sinks.File"],
"MinimumLevel": {
"Default": "Debug",
"Override": {
"Microsoft": "Warning",
"System": "Warning"
}
},
"Enrich": ["FromLogContext"],
"WriteTo": [
{ "Name": "Console" },
{ "Name": "Debug" },
{
"Name": "File",
"Args": {
"path": "%LogDir%\\sampleapp\\log-.txt",
"rollingInterval": "Day",
"shared": true
}
}
],
"Properties": {
"Application": "sampleapp"
}
},
请注意,我还从文件名中删除了{Date}
。 显然,如果您将滚动间隔设置为天,它就会坚持下去......
appsettings.Development.json
覆盖设置在appsettings.json
我再次重申, appsettings.Development.json
配置将优先于appsettings.json
。 我知道这听起来很明显,但我敢打赌,将来有人会像我一样忽略这一点。
我花了将近一个小时摸不着头脑,为什么没有将日志写入文件,后来才注意到我的appsettings.Development.json
只有Console
器(有效地删除了appsettings.json
File
器appsettings.json
!)。
以下是正确配置的示例(根据您的需要进行修改):
ASP.NET 核心 3.1
程序.cs
using Microsoft.AspNetCore.Hosting;
using Serilog;
using System;
using System.IO;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Serilog.Core;
namespace My.App
{
public class Program
{
private static bool IsDevelopment =>
Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") == "Development";
public static IConfiguration Configuration { get; } = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", false, true)
.AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", true)
.AddEnvironmentVariables()
.Build();
public static Logger Logger { get; } = new LoggerConfiguration()
.ReadFrom.Configuration(Configuration)
.Enrich.FromLogContext()
.CreateLogger();
public static int Main(string[] args)
{
Log.Logger = Logger;
try
{
Log.Information("Starting...");
var host = CreateHostBuilder(args).Build();
host.Run();
return 0;
}
catch (Exception ex)
{
Log.Fatal(ex, "Host terminated unexpectedly");
return 1;
}
finally
{
Log.CloseAndFlush();
}
}
public static IHostBuilder CreateHostBuilder(string[] args)
{
var host = Host.CreateDefaultBuilder(args)
.UseSerilog()
.UseServiceProviderFactory(
new AutofacMultitenantServiceProviderFactory(Startup.ConfigureMultitenantContainer))
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>();
});
return host;
}
}
}
ASP.NET 核心 2.2
程序.cs
public class Program
{
public static IConfiguration Configuration { get; } = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", optional: true)
.AddEnvironmentVariables()
.Build();
public static void Main(string[] args)
{
Log.Logger = new LoggerConfiguration()
.ReadFrom.Configuration(Configuration)
.Enrich.FromLogContext()
.CreateLogger();
try
{
Log.Information("Starting...");
CreateWebHostBuilder(args).Run();
}
catch (Exception ex)
{
Log.Fatal(ex, "Host terminated unexpectedly");
}
finally
{
Log.CloseAndFlush();
}
}
public static IWebHost CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseSerilog()
.Build();
}
appsettings.json
{
"Serilog": {
"MinimumLevel": {
"Default": "Debug",
"Override": {
"Microsoft": "Warning",
"System": "Warning"
}
},
"Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ]
}
}
appsettings.Development.json
{
"Serilog": {
"WriteTo": [
{
"Name": "Async",
"Args": {
"configure": [
{
"Name": "Console"
},
{
"Name": "Debug"
},
{
"Name": "DiagnosticTrace"
},
{
"Name": "File",
"Args": {
"path": "/home/log/api-log-.txt",
"rollingInterval": "Day",
"retainedFileCountLimit": 7,
"buffered": true
}
}
]
}
}
]
}
}
appsettings.Production.json
{
"Serilog": {
"MinimumLevel": {
"Default": "Information"
},
"WriteTo": [
{
"Name": "Async",
"Args": {
"configure": [
{
"Name": "ApplicationInsights",
"Args": {
"restrictedToMinimumLevel": "Information",
"telemetryConverter": "Serilog.Sinks.ApplicationInsights.Sinks.ApplicationInsights.TelemetryConverters.TraceTelemetryConverter, Serilog.Sinks.ApplicationInsights"
}
},
{
"Name": "Email",
"Args": {
"EmailConnectionInfo": {
"EmailSubject": "PRODUCTION error logs",
"FromEmail": "xxxxxxx",
"ToEmail": "xxxxxxx",
"MailServer": "xxxx",
"NetworkCredentials": {
"username": "xxxxxx",
"password": "xxxxxx",
"domain": "xxxxx"
},
"Port": 25
},
"restrictedToMinimumLevel": "Error"
}
},
{
"Name": "File",
"Args": {
"path": "/home/log/api-log-.txt",
"rollingInterval": "Day",
"retainedFileCountLimit": 15,
"buffered": true
}
}
]
}
}
]
}
}
这是我更正的设置 JSON:
在启动类中:
Log.Logger = new LoggerConfiguration()
.ReadFrom.Configuration(config)
.Enrich.With<EventTypeEnricher>()
.CreateLogger();
在appsettings.json 中
{
"Serilog": {
"Using": [
"Serilog.Sinks.Console",
"Serilog.Sinks.Seq",
"Serilog.Sinks.Async",
"Serilog.Sinks.File",
"Serilog.Sinks.Debug"
],
"MinimumLevel": {
"Default": "Information",
"Override": {
"Microsoft": "Warning",
"System": "Warning"
}
},
"Enrich": [
"FromLogContext",
"WithMachineName"
],
"Properties": {
"ApplicationName": "AppSim Crawler"
},
"WriteTo": [
{
"Name": "Seq",
"Args": {
"serverUrl": "http://localhost:5341",
"apiKey": "none"
}
},
{
"Name": "Debug",
"Args": {
"outputTemplate": "{Timestamp:dd-MM-yyyy HH:mm:ss.fff} [{EventType:x8} {Level:u3}] <s:[{SourceContext}]> <method:[{FileName} > {MemberName}]>{NewLine}at {FilePath}:{LineNumber}{NewLine}{Message:lj}{NewLine}{Exception}{NewLine}"
}
},
{
"Name": "Async",
"Args": {
"configure": [
{
"Name": "Console",
"Args": {
"theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console",
"outputTemplate": "{Timestamp:dd-MM-yyyy HH:mm:ss.fff} [{EventType:x8} {Level:u3}] <c:[%COMPUTERNAME%]> <s:[{SourceContext}]> <method:[{FileName} > {MemberName}]>{NewLine}at {FilePath}:{LineNumber}{NewLine}{Message:lj}{NewLine}{Exception}{NewLine}"
}
}
]
}
},
{
"Name": "Async",
"Args": {
"configure": [
{
"Name": "File",
"Args": {
"path": "C:/appsim/logs/appSimCrawler.log",
"outputTemplate": "{Timestamp:dd-MM-yyyy HH:mm:ss.fff} [{EventType:x8} {Level:u3}] <s:[{SourceContext}]> <method:[{FileName} > {MemberName}]>{NewLine}at {FilePath}:{LineNumber}{NewLine}{Message:lj}{NewLine}{Exception}{NewLine}",
"rollingInterval": "Day",
"retainedFileCountLimit": 30,
"shared": true,
"rollOnFileSizeLimit": true
}
}
]
}
}
]
}
}
对我来说,serilog 没有写入日志文件,因为我丢失了许多 nuget 包之一(Serilog.Sinks.Async)。 因此,除了确保您在 appsettings.json 中的配置是正确的 - 并且您正在为 dev vs prod 使用正确的文件之外,还要:
我建议再次查看文档或教程,并确保添加说明中提到的每个 nuget 包。
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