Merge pull request #12880 from JPVenson/feature/10.10/DetachedMigration

Added Setup overlay app to communicate status of startup

2 files changed, 195 insertions, 12 deletions

diff --git a/Jellyfin.Server/Program.cs b/Jellyfin.Server/Program.cs
index 3f73c15b4..7e50100b0 100644
--- a/Jellyfin.Server/Program.cs
+++ b/Jellyfin.Server/Program.cs
@@ -10,7 +10,9 @@ using Emby.Server.Implementations;
 using Jellyfin.Server.Extensions;
 using Jellyfin.Server.Helpers;
 using Jellyfin.Server.Implementations;
+using Jellyfin.Server.ServerSetupApp;
 using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Net;
 using MediaBrowser.Controller;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Data.Sqlite;
@@ -43,6 +45,9 @@ namespace Jellyfin.Server
         public const string LoggingConfigFileSystem = "logging.json";
 
         private static readonly SerilogLoggerFactory _loggerFactory = new SerilogLoggerFactory();
+        private static SetupServer _setupServer = new();
+        private static CoreAppHost? _appHost;
+        private static IHost? _jellyfinHost = null;
         private static long _startTimestamp;
         private static ILogger _logger = NullLogger.Instance;
         private static bool _restartOnShutdown;
@@ -69,6 +74,7 @@ namespace Jellyfin.Server
         {
             _startTimestamp = Stopwatch.GetTimestamp();
             ServerApplicationPaths appPaths = StartupHelpers.CreateApplicationPaths(options);
+            await _setupServer.RunAsync(static () => _jellyfinHost?.Services?.GetService<INetworkManager>(), appPaths, static () => _appHost).ConfigureAwait(false);
 
             // $JELLYFIN_LOG_DIR needs to be set for the logger configuration manager
             Environment.SetEnvironmentVariable("JELLYFIN_LOG_DIR", appPaths.LogDirectoryPath);
@@ -123,22 +129,23 @@ namespace Jellyfin.Server
                 if (_restartOnShutdown)
                 {
                     _startTimestamp = Stopwatch.GetTimestamp();
+                    _setupServer = new SetupServer();
+                    await _setupServer.RunAsync(static () => _jellyfinHost?.Services?.GetService<INetworkManager>(), appPaths, static () => _appHost).ConfigureAwait(false);
                 }
             } while (_restartOnShutdown);
         }
 
         private static async Task StartServer(IServerApplicationPaths appPaths, StartupOptions options, IConfiguration startupConfig)
         {
-            using var appHost = new CoreAppHost(
-                appPaths,
-                _loggerFactory,
-                options,
-                startupConfig);
-
-            IHost? host = null;
+            using CoreAppHost appHost = new CoreAppHost(
+                            appPaths,
+                            _loggerFactory,
+                            options,
+                            startupConfig);
+            _appHost = appHost;
             try
             {
-                host = Host.CreateDefaultBuilder()
+                _jellyfinHost = Host.CreateDefaultBuilder()
                     .UseConsoleLifetime()
                     .ConfigureServices(services => appHost.Init(services))
                     .ConfigureWebHostDefaults(webHostBuilder =>
@@ -155,14 +162,17 @@ namespace Jellyfin.Server
                     .Build();
 
                 // Re-use the host service provider in the app host since ASP.NET doesn't allow a custom service collection.
-                appHost.ServiceProvider = host.Services;
+                appHost.ServiceProvider = _jellyfinHost.Services;
 
                 await appHost.InitializeServices().ConfigureAwait(false);
                 Migrations.MigrationRunner.Run(appHost, _loggerFactory);
 
                 try
                 {
-                    await host.StartAsync().ConfigureAwait(false);
+                    await _setupServer.StopAsync().ConfigureAwait(false);
+                    _setupServer.Dispose();
+                    _setupServer = null!;
+                    await _jellyfinHost.StartAsync().ConfigureAwait(false);
 
                     if (!OperatingSystem.IsWindows() && startupConfig.UseUnixSocket())
                     {
@@ -181,7 +191,7 @@ namespace Jellyfin.Server
 
                 _logger.LogInformation("Startup complete {Time:g}", Stopwatch.GetElapsedTime(_startTimestamp));
 
-                await host.WaitForShutdownAsync().ConfigureAwait(false);
+                await _jellyfinHost.WaitForShutdownAsync().ConfigureAwait(false);
                 _restartOnShutdown = appHost.ShouldRestart;
             }
             catch (Exception ex)
@@ -213,7 +223,8 @@ namespace Jellyfin.Server
                     }
                 }
 
-                host?.Dispose();
+                _appHost = null;
+                _jellyfinHost?.Dispose();
             }
         }
 
diff --git a/Jellyfin.Server/ServerSetupApp/SetupServer.cs b/Jellyfin.Server/ServerSetupApp/SetupServer.cs
new file mode 100644
index 000000000..9e2cf5bc8
--- /dev/null
+++ b/Jellyfin.Server/ServerSetupApp/SetupServer.cs
@@ -0,0 +1,172 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Controller;
+using MediaBrowser.Model.System;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Microsoft.Extensions.Hosting;
+
+namespace Jellyfin.Server.ServerSetupApp;
+
+/// <summary>
+/// Creates a fake application pipeline that will only exist for as long as the main app is not started.
+/// </summary>
+public sealed class SetupServer : IDisposable
+{
+    private IHost? _startupServer;
+    private bool _disposed;
+
+    /// <summary>
+    /// Starts the Bind-All Setup aspcore server to provide a reflection on the current core setup.
+    /// </summary>
+    /// <param name="networkManagerFactory">The networkmanager.</param>
+    /// <param name="applicationPaths">The application paths.</param>
+    /// <param name="serverApplicationHost">The servers application host.</param>
+    /// <returns>A Task.</returns>
+    public async Task RunAsync(
+        Func<INetworkManager?> networkManagerFactory,
+        IApplicationPaths applicationPaths,
+        Func<IServerApplicationHost?> serverApplicationHost)
+    {
+        ThrowIfDisposed();
+        _startupServer = Host.CreateDefaultBuilder()
+            .UseConsoleLifetime()
+            .ConfigureServices(serv =>
+            {
+                serv.AddHealthChecks()
+                    .AddCheck<SetupHealthcheck>("StartupCheck");
+            })
+            .ConfigureWebHostDefaults(webHostBuilder =>
+                    {
+                        webHostBuilder
+                                .UseKestrel()
+                                .Configure(app =>
+                                {
+                                    app.UseHealthChecks("/health");
+
+                                    app.Map("/startup/logger", loggerRoute =>
+                                    {
+                                        loggerRoute.Run(async context =>
+                                        {
+                                            var networkManager = networkManagerFactory();
+                                            if (context.Connection.RemoteIpAddress is null || networkManager is null || !networkManager.IsInLocalNetwork(context.Connection.RemoteIpAddress))
+                                            {
+                                                context.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
+                                                return;
+                                            }
+
+                                            var logFilePath = new DirectoryInfo(applicationPaths.LogDirectoryPath)
+                                                .EnumerateFiles()
+                                                .OrderBy(f => f.CreationTimeUtc)
+                                                .FirstOrDefault()
+                                                ?.FullName;
+                                            if (logFilePath is not null)
+                                            {
+                                                await context.Response.SendFileAsync(logFilePath, CancellationToken.None).ConfigureAwait(false);
+                                            }
+                                        });
+                                    });
+
+                                    app.Map("/System/Info/Public", systemRoute =>
+                                    {
+                                        systemRoute.Run(async context =>
+                                        {
+                                            var jfApplicationHost = serverApplicationHost();
+
+                                            var retryCounter = 0;
+                                            while (jfApplicationHost is null && retryCounter < 5)
+                                            {
+                                                await Task.Delay(500).ConfigureAwait(false);
+                                                jfApplicationHost = serverApplicationHost();
+                                                retryCounter++;
+                                            }
+
+                                            if (jfApplicationHost is null)
+                                            {
+                                                context.Response.StatusCode = (int)HttpStatusCode.ServiceUnavailable;
+                                                context.Response.Headers.RetryAfter = new Microsoft.Extensions.Primitives.StringValues("60");
+                                                return;
+                                            }
+
+                                            var sysInfo = new PublicSystemInfo
+                                            {
+                                                Version = jfApplicationHost.ApplicationVersionString,
+                                                ProductName = jfApplicationHost.Name,
+                                                Id = jfApplicationHost.SystemId,
+                                                ServerName = jfApplicationHost.FriendlyName,
+                                                LocalAddress = jfApplicationHost.GetSmartApiUrl(context.Request),
+                                                StartupWizardCompleted = false
+                                            };
+
+                                            await context.Response.WriteAsJsonAsync(sysInfo).ConfigureAwait(false);
+                                        });
+                                    });
+
+                                    app.Run((context) =>
+                                    {
+                                        context.Response.StatusCode = (int)HttpStatusCode.ServiceUnavailable;
+                                        context.Response.Headers.RetryAfter = new Microsoft.Extensions.Primitives.StringValues("60");
+                                        context.Response.WriteAsync("<p>Jellyfin Server still starting. Please wait.</p>");
+                                        var networkManager = networkManagerFactory();
+                                        if (networkManager is not null && context.Connection.RemoteIpAddress is not null && networkManager.IsInLocalNetwork(context.Connection.RemoteIpAddress))
+                                        {
+                                            context.Response.WriteAsync("<p>You can download the current logfiles <a href='/startup/logger'>here</a>.</p>");
+                                        }
+
+                                        return Task.CompletedTask;
+                                    });
+                                });
+                    })
+                    .Build();
+        await _startupServer.StartAsync().ConfigureAwait(false);
+    }
+
+    /// <summary>
+    /// Stops the Setup server.
+    /// </summary>
+    /// <returns>A task. Duh.</returns>
+    public async Task StopAsync()
+    {
+        ThrowIfDisposed();
+        if (_startupServer is null)
+        {
+            throw new InvalidOperationException("Tried to stop a non existing startup server");
+        }
+
+        await _startupServer.StopAsync().ConfigureAwait(false);
+    }
+
+    /// <inheritdoc/>
+    public void Dispose()
+    {
+        if (_disposed)
+        {
+            return;
+        }
+
+        _disposed = true;
+        _startupServer?.Dispose();
+    }
+
+    private void ThrowIfDisposed()
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+    }
+
+    private class SetupHealthcheck : IHealthCheck
+    {
+        public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
+        {
+            return Task.FromResult(HealthCheckResult.Degraded("Server is still starting up."));
+        }
+    }
+}