如何在TopShelf中指定服务的命令行选项 [英] How to specify command line options for service in TopShelf

问题描述

我正在使用命令行参数将某些配置传递给Windows服务（它将是少数几个具有不同命令行的实例）。

I am using command line arguments to pass some configuration to the windows service (it will be few instances with different command lines).

我的代码如下所示：

HostFactory.Run(x =>                                 
{
    x.Service<MyHost>(s =>
    {                    
        s.ConstructUsing(name => new MyHost());
        s.WhenStarted(tc => tc.Start());             
        s.WhenStopped(tc => tc.Stop());              
    });
    x.AddCommandLineDefinition("sqlserver", v => sqlInstance = v);
}); 

在安装服务时，我使用：

When I install service I use:

myhost.exe install -sqlserver:someinstance

不幸的是， sqlserver 命令行选项仅在安装阶段可用，而不能转到服务的参数。因此，当我运行服务时，没有得到所需的参数值。

Unfortunately, sqlserver command line options is available only on install phase, and do not go to the parameters of the service. So when I run service, I do not get parameter value I need.

有什么方法可以修改TopShelf启动的服务的命令行吗？

Is there any way to modify command line of the service started by TopShelf?

推荐答案

我也有类似的要求，但是不幸的是，不能将命令行参数存储在文件中。

I have a similar requirement and unfortunately storing the command line parameters in a file was not an option.

免责声明：此方法仅对Windows有效

首先我添加了安装后操作

x.AfterInstall(
    installSettings =>
    {
         AddCommandLineParametersToStartupOptions(installSettings);
    });

在 AddCommanLineParameterToStartupOptions 中，我更新了该服务的ImagePath Windows注册表项包括命令行参数。

In AddCommanLineParameterToStartupOptions I update the ImagePath Windows Registry entry for the service to include the command line parameters.

TopShelf在此步骤之后添加其参数，以避免重复 servicename 和 instance 我将它们过滤掉了。您可能需要过滤的内容不止这些，但就我而言，这已经足够。

TopShelf adds it's parameters after this step so to avoid duplicates of servicename and instance I filter these out. You may want to filter out more than just those but in my case this was enough.

     private static void AddCommandLineParametersToStartupOptions(InstallHostSettings installSettings)
     {
            var serviceKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(
                $"SYSTEM\\CurrentControlSet\\Services\\{installSettings.ServiceName}",
                true);

            if (serviceKey == null)
            {
                throw new Exception($"Could not locate Registry Key for service '{installSettings.ServiceName}'");
            }

            var arguments = Environment.GetCommandLineArgs();

            string programName = null;
            StringBuilder argumentsList = new StringBuilder();

            for (int i = 0; i < arguments.Length; i++)
            {
                if (i == 0)
                {
                    // program name is the first argument
                    programName = arguments[i];
                }
                else
                {
                    // Remove these servicename and instance arguments as TopShelf adds them as well
                    // Remove install switch
                    if (arguments[i].StartsWith("-servicename", StringComparison.InvariantCultureIgnoreCase) |
                        arguments[i].StartsWith("-instance", StringComparison.InvariantCultureIgnoreCase) |
                        arguments[i].StartsWith("install", StringComparison.InvariantCultureIgnoreCase))
                    {
                        continue;
                    }
                    argumentsList.Append(" ");
                    argumentsList.Append(arguments[i]);
                }
            }

            // Apply the arguments to the ImagePath value under the service Registry key
            var imageName = $"\"{Environment.CurrentDirectory}\\{programName}\" {argumentsList.ToString()}";
            serviceKey.SetValue("ImagePath", imageName, Microsoft.Win32.RegistryValueKind.String);
}

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