Set the application name to "PVBridge Service" and create an event log source named like that.

Remove code that copies CreateDefaultBuilder() behavior.

Author: CodeCasterNL

src/CodeCaster.PVBridge.Service/CommandLine/WindowsServiceManager.cs

@@ -14,6 +14,11 @@ internal class WindowsServiceManager
     {
         private readonly ILogger<WindowsServiceManager> _logger;
 
+        /// <summary>
+        /// Event Log name.
+        /// </summary>
+        private const string applicationLogName = "Application";
+
         // TODO: validate setter
         private string ServiceName { get; } = "PVBridge";
 
@@ -54,6 +59,23 @@ internal async Task InstallServiceAsync(IServiceProvider services, string servic
                 throw new InvalidOperationException($"The service path \"{servicePath}\" does not point to a valid executable file.");
             }
 
+            // Create the event log source so we can log warnings and up to the event log.
+            try
+            {
+                if (!EventLog.SourceExists(Program.ApplicationName))
+                {
+                    _logger.LogInformation("Creating {application} log source {source}", applicationLogName, Program.ApplicationName);
+
+                    EventLog.CreateEventSource(Program.ApplicationName, applicationLogName);
+                }
+            }
+            catch (Exception e)
+            {
+                // That's not a fatal error.
+                _logger.LogError(e, "Creating {application} log source {source} failed", applicationLogName, Program.ApplicationName);
+            }
+
+
             using (var serviceController = GetServiceController())
             {
                 if (serviceController == null)
@@ -189,7 +211,7 @@ private async Task<int> InstallServiceAsync(string servicePath)
 
             // Set failure mode: retry twice after 2 minutes, then after a day. Error count resets in a day.
             scArguments = $"failure {ServiceName} reset= 86400 actions= restart/60000/restart/60000/restart/86400";
-            
+
             return await RunCreateServiceAsync(scArguments);
         }
 

src/CodeCaster.PVBridge.Service/Program.cs

@@ -21,6 +21,11 @@ namespace CodeCaster.PVBridge.Service
     /// </summary>
     public static class Program
     {
+        /// <summary>
+        /// Event Log source name.
+        /// </summary>
+        public static readonly string ApplicationName = "PVBridge Service";
+
         public static async Task Main(string[] args)
         {
             try
@@ -61,7 +66,7 @@ private static Command GetSyncCommand(IHost host)
             };
 
             // TODO: make Argument<DateTime?>, but that doesn't work: https://github.com/dotnet/command-line-api/issues/1669
-            var untilOption = new Option<DateTime?>(new [] { "--until", "-u" }, "The inclusive end date to sync. Format: yyyy-MM-dd.")
+            var untilOption = new Option<DateTime?>(new[] { "--until", "-u" }, "The inclusive end date to sync. Format: yyyy-MM-dd.")
             {
                 IsRequired = false
             };
@@ -204,19 +209,13 @@ private static IHostBuilder CreateHostBuilder(string[] args)
             return Host.CreateDefaultBuilder(args)
                 .ConfigureAppConfiguration((context, config) =>
                 {
-                    config.AddEnvironmentVariables();
-
-                    // enviroment from command line
-                    // e.g.: dotnet run --environment "Staging"
-                    config.AddCommandLine(args);
-
-                    config.AddJsonFile("appsettings.json");
-                    config.AddJsonFile($"appsettings.{context.HostingEnvironment.EnvironmentName}.json", optional: true);
+                    // Sets the Event Log source name (through UseWindowsServiceExtensions -> UseWindowsService).
+                    context.HostingEnvironment.ApplicationName = Program.ApplicationName;
 
+                    // Read "C:\ProgramData\PVBridge\PVBridge.AccountConfig.json". Optional because it doesn't exist on first run.
                     var globalSettingsFilePath = ConfigurationReader.GlobalSettingsFilePath;
                     var globalSettingsFileName = Path.GetFileNameWithoutExtension(ConfigurationReader.GlobalSettingsFilePath);
 
-                    // Read "C:\ProgramData\PVBridge\PVBridge.AccountConfig.json". Optional because it doesn't exist on first run.
                     config.AddJsonFile(ConfigurationReader.GlobalSettingsFilePath, optional: true, reloadOnChange: true);
                 })
                 .ConfigureServices((context, services) =>