c# - .NET Core 1.1 控制台应用程序总是在 Ubuntu 16.04 上作为 systemd 服务退出/崩溃

Question

我正在尝试创建一个简单的回显服务，它与 systemd 一起工作初始化系统。一切正常，它甚至在快速部署后启动，但它很快退出(或崩溃)，当我试图通过 systemctl status <service> 弄清楚它的状态时命令。

逻辑很简单，这里我提供下一个来源:

Program.cs

using System;
using System.Threading.Tasks;

namespace hw
{
    class Program
    {
        private const int delay = 1000;
        private static Random random = new Random();

        static async Task Handle()
        {
            Console.WriteLine($"tick tack... {random.Next()}");
            await Task.Delay(delay);
            await Handle();
        }

        static void Main(string[] args)
        {
            Task.Factory.StartNew(async() => await Handle());
            Console.ReadLine();
        }
    }
}

hw.service(系统配置文件)

[Unit]
Description=HW Echo Service

[Service]
WorkingDirectory=/var/netcore/hw
ExecStart=/usr/bin/dotnet /var/netcore/hw/hw.dll
Restart=always
RestartSec=10
SyslogIdentifier=dotnet-echo-hw

[Install]
WantedBy=multi-user.target

Help-script, init.sh(您也可以使用 chmod +x init.sh ，如果想在您的本地系统上尝试):

dotnet build
dotnet publish

echo "\nPreparing binaries for the service directory:\n"
rm -rf /var/netcore/hw
mkdir /var/netcore /var/netcore/hw
cp -R bin/Debug/netcoreapp1.1/publish/* /var/netcore/hw
ls -la /var/netcore/hw

echo "\nInitializing the systemd service:"
systemctl stop hw.service
rm /etc/systemd/system/hw.service
cp hw.service /etc/systemd/system/hw.service
systemctl daemon-reload
systemctl enable hw.service
systemctl start hw.service
systemctl status hw.service

日志:

• 构建/部署:https://pastebin.com/9hwbxrCX
• 来自 journalctl -fu hw.service : https://pastebin.com/SSMNbgtS
• 来自 systemctl status hw.service ，在第一次部署之后:https://pastebin.com/3HySgdsi

我还在等什么？

我希望我的服务像我的其他服务 (ASP.NET Core) 一样运行(处于事件/绿色状态)作为 systemd服务。至于 ASP.NET Core 项目，没有问题，至于简单的控制台 - 它们是......

如何解决我的问题？

谢谢

Answer 1

由于 Evk 建议使用 ManualResetEvent，我已经完成了下一步:

using System;
using System.Threading;
using System.Threading.Tasks;

namespace hw
{
    class Program
    {
        private const int delay = 1000;
        private static Random random = new Random();
        private static ManualResetEvent resetEvent = new ManualResetEvent(false);

        static async Task Handle()
        {
            Console.WriteLine($"tick tack... {random.Next()}");
            await Task.Delay(delay);
            await Handle();
        }

        static void Main(string[] args)
        {
            Task.Factory.StartNew(async() => await Handle());
            Console.CancelKeyPress += (sender, eventArgs) => 
            {
                // Cancel the cancellation to allow the program to shutdown cleanly.
                eventArgs.Cancel = true;
                resetEvent.Set();
            };
            resetEvent.WaitOne();
        }
    }
}

现在一切正常，服务不会停止/崩溃。