Code for systemd post

logs

Jul 30 01:05:14 glennc-systemd testapp[44516]: Microsoft.Hosting.Lifetime[0] Application started. Hosting environment: Production; Content root path: /
Jul 30 01:05:15 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:15 +00:00
Jul 30 01:05:16 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:16 +00:00
Jul 30 01:05:17 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:17 +00:00
Jul 30 01:05:18 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:18 +00:00
Jul 30 01:05:19 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:19 +00:00
Jul 30 01:05:20 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:20 +00:00
Jul 30 01:05:21 glennc-systemd testapp[44516]: testapp.Worker[0] Worker running at: 07/30/2019 01:05:21 +00:00

program.cs

public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .UseSystemd()
        .ConfigureServices((hostContext, services) =>
        {
            services.AddHostedService<Worker>();
        });

project.csproj

<Project Sdk="Microsoft.NET.Sdk.Worker">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <UserSecretsId>dotnet-testapp-F2B98682-0CD2-4F05-967B-716D6E4CA95C</UserSecretsId>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="3.0.0-preview7.19362.4" />
    <PackageReference Include="Microsoft.Extensions.Hosting.Systemd" Version="3.0.0-preview7.19362.4" />
  </ItemGroup>
</Project>

service

[Unit]
Description=my test app

[Service]
Type=notify
ExecStart=/usr/sbin/testapp

[Install]
WantedBy=multi-user.target

worker.cs

public Worker(ILogger<Worker> logger, IHostLifetime lifetime)
{
    _logger = logger;
    _logger.LogInformation("IsSystemd: {isSystemd}", lifetime.GetType() == typeof(SystemdLifetime));
    _logger.LogInformation("IHostLifetime: {hostLifetime}", lifetime.GetType());
}

protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
    _logger.LogCritical("Critical log on startup.");
    while (!stoppingToken.IsCancellationRequested)
    {
        _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
        await Task.Delay(1000, stoppingToken);
    }
}