[C#-Linux] 워커 서비스 프로그램 서비스로 등록하기

1. .NET 5 Work Service 생성

2.

• nuget에서 Microsoft.Extensions.Hosting.Systemd 설치
• program.cs - .UseSystemd() 추가

      public class Program
      {
          /*
              [서비스 등록]
              sudo dotnet ./Worker_Service.dll --install
              sudo dotnet ./Worker_Service.dll -i
              [서비스 해제]
              sudo dotnet ./Worker_Service.dll --uninstall
              sudo dotnet ./Worker_Service.dll -u
              [서비스 시작]
              sudo systemctl start dotnet-worker_Service
              [서비스 중지-1 SIGINT]
              sudo systemctl stop dotnet-worker_Service
              [서비스 중지-2 SIGTERM]
              sudo systemctl kill dotnet-worker_Service
              [로그 보기]
              sudo journalctl -u dotnet-worker_Service
           */
          public static void Main(string[] args)
          {
              if (args.Length >= 1)
              {
                  string netDllPath = typeof(Program).Assembly.Location;
  
                  if (args[0] == "--install" || args[0] == "-i")
                  {
                      InstallService(netDllPath, true);
                  }
                  else if (args[0] == "--uninstall" || args[0] == "-u")
                  {
                      InstallService(netDllPath, false);
                  }
  
                  return;
              }
  
              CreateHostBuilder(args).Build().Run();
          }
  
          public static IHostBuilder CreateHostBuilder(string[] args) =>
              Host.CreateDefaultBuilder(args)
                  .UseSystemd()
                  .ConfigureServices((hostContext, services) =>
                  {
                      services.AddHostedService<Worker>();
                  });
  
          static int InstallService(string netDllPath, bool doInstall)
          {
              // 2021-04-22
              // remove: KillSignal=SIGINT
              // added: KillMode=mixed
              string serviceFile = @"
  [Unit]
  Description={0} running on {1}
  [Service]
  WorkingDirectory={2}
  ExecStart={3} {4}
  SyslogIdentifier={5}
  KillMode=mixed
  [Install]
  WantedBy=multi-user.target
  ";
  
              string dllFileName = Path.GetFileName(netDllPath);
              string osName = Environment.OSVersion.ToString();
  
              FileInfo fi = null;
  
              try
              {
                  fi = new FileInfo(netDllPath);
              }
              catch { }
  
              if (doInstall == true && fi != null && fi.Exists == false)
              {
                  WriteLog("NOT FOUND: " + fi.FullName);
                  return 1;
              }
  
              string serviceName = "dotnet-" + Path.GetFileNameWithoutExtension(dllFileName).ToLower();
  
              string exeName = Process.GetCurrentProcess().MainModule.FileName;
  
              string workingDir = Path.GetDirectoryName(fi.FullName);
              string fullText = string.Format(serviceFile, dllFileName, osName, workingDir,
                      exeName, fi.FullName, serviceName);
  
              string serviceFilePath = $"/etc/systemd/system/{serviceName}.service";
  
              if (doInstall == true)
              {
                  File.WriteAllText(serviceFilePath, fullText);
                  WriteLog(serviceFilePath + " Created");
                  ControlService(serviceName, "enable");
                  ControlService(serviceName, "start");
              }
              else
              {
                  if (File.Exists(serviceFilePath) == true)
                  {
                      ControlService(serviceName, "stop");
                      File.Delete(serviceFilePath);
                      WriteLog(serviceFilePath + " Deleted");
                  }
              }
  
              return 0;
          }
  
          static int ControlService(string serviceName, string mode)
          {
              string servicePath = $"/etc/systemd/system/{serviceName}.service";
  
              if (File.Exists(servicePath) == false)
              {
                  WriteLog($"No service: {serviceName} to {mode}");
                  return 1;
              }
  
              ProcessStartInfo psi = new ProcessStartInfo();
              psi.FileName = "systemctl";
              psi.Arguments = $"{mode} {serviceName}";
              using Process child = Process.Start(psi);
              child.WaitForExit();
              return child.ExitCode;
          }
  
          static void WriteLog(string text)
          {
              Console.WriteLine(text);
          }
      }

3. 프로그램 등록, 시작, 중지, 삭제

    $cd /usr/local/Worker_Service
    [서비스 등록]
    $sudo dotnet ./Worker_Service.dll --install
    $sudo dotnet ./Worker_Service.dll -i

    [서비스 해제]
    $sudo dotnet ./Worker_Service.dll --uninstall
    $sudo dotnet ./Worker_Service.dll -u

    [서비스 시작]
    $sudo systemctl start dotnet-worker_service

    [서비스 중지-1 SIGINT]
    $sudo systemctl stop dotnet-worker_service

    [서비스 중지-2 SIGTERM]
    $sudo systemctl kill dotnet-worker_service

    [로그 보기]
    $sudo journalctl -u dotnet-worker_service

 

 

참고 : https://www.sysnet.pe.kr/Default.aspx?mode=2&sub=0&pageno=0&detail=1&wid=12608

.NET Framework: 1044. C# - Generic Host를 이용해 .NET 5로 리눅스 daemon 프로그램 만드는 방법