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Enable in-process restarting

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pull/9100/head
Patrick Barron 2 years ago
parent f8ca71ee15
commit dc85d86ea1
7 changed files with 46 additions and 89 deletions
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13
Emby.Server.Implementations/ApplicationHost.cs
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@ -193,11 +193,6 @@ namespace Emby.Server.Implementations
/// </summary>
private string PublishedServerUrl => _startupConfig[AddressOverrideKey];
/// <summary>
/// Gets a value indicating whether this instance can self restart.
/// </summary>
public bool CanSelfRestart => _startupOptions.RestartPath is not null;
public bool CoreStartupHasCompleted { get; private set; }
public virtual bool CanLaunchWebBrowser
@ -935,17 +930,13 @@ namespace Emby.Server.Implementations
/// </summary>
public void Restart()
{
if (!CanSelfRestart)
{
throw new PlatformNotSupportedException("The server is unable to self-restart. Please restart manually.");
}
if (IsShuttingDown)
{
return;
}
IsShuttingDown = true;
_pluginManager.UnloadAssemblies();
Task.Run(async () =>
{
@ -1047,7 +1038,7 @@ namespace Emby.Server.Implementations
CachePath = ApplicationPaths.CachePath,
OperatingSystem = MediaBrowser.Common.System.OperatingSystem.Id.ToString(),
OperatingSystemDisplayName = MediaBrowser.Common.System.OperatingSystem.Name,
CanSelfRestart = CanSelfRestart,
CanSelfRestart = true,
CanLaunchWebBrowser = CanLaunchWebBrowser,
TranscodingTempPath = ConfigurationManager.GetTranscodePath(),
ServerName = FriendlyName,

10
Emby.Server.Implementations/IStartupOptions.cs
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@ -20,16 +20,6 @@ namespace Emby.Server.Implementations
/// </summary>
string? PackageName { get; }
/// <summary>
/// Gets the value of the --restartpath command line option.
/// </summary>
string? RestartPath { get; }
/// <summary>
/// Gets the value of the --restartargs command line option.
/// </summary>
string? RestartArgs { get; }
/// <summary>
/// Gets the value of the --published-server-url command line option.
/// </summary>

12
Emby.Server.Implementations/Plugins/PluginManager.cs
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@ -5,6 +5,7 @@ using System.IO;
using System.Linq;
using System.Net.Http;
using System.Reflection;
using System.Runtime.Loader;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
@ -30,6 +31,7 @@ namespace Emby.Server.Implementations.Plugins
{
private readonly string _pluginsPath;
private readonly Version _appVersion;
private readonly AssemblyLoadContext _assemblyLoadContext;
private readonly JsonSerializerOptions _jsonOptions;
private readonly ILogger<PluginManager> _logger;
private readonly IApplicationHost _appHost;
@ -76,6 +78,8 @@ namespace Emby.Server.Implementations.Plugins
_appHost = appHost;
_minimumVersion = new Version(0, 0, 0, 1);
_plugins = Directory.Exists(_pluginsPath) ? DiscoverPlugins().ToList() : new List<LocalPlugin>();
_assemblyLoadContext = new AssemblyLoadContext("PluginContext", true);
}
private IHttpClientFactory HttpClientFactory
@ -124,7 +128,7 @@ namespace Emby.Server.Implementations.Plugins
Assembly assembly;
try
{
assembly = Assembly.LoadFrom(file);
assembly = _assemblyLoadContext.LoadFromAssemblyPath(file);
// Load all required types to verify that the plugin will load
assembly.GetTypes();
@ -156,6 +160,12 @@ namespace Emby.Server.Implementations.Plugins
}
}
/// <inheritdoc />
public void UnloadAssemblies()
{
_assemblyLoadContext.Unload();
}
/// <summary>
/// Creates all the plugin instances.
/// </summary>

81
Jellyfin.Server/Program.cs
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@ -12,6 +12,7 @@ using Jellyfin.Server.Extensions;
using Jellyfin.Server.Helpers;
using Jellyfin.Server.Implementations;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
@ -40,8 +41,9 @@ namespace Jellyfin.Server
/// </summary>
public const string LoggingConfigFileSystem = "logging.json";
private static readonly CancellationTokenSource _tokenSource = new CancellationTokenSource();
private static readonly ILoggerFactory _loggerFactory = new SerilogLoggerFactory();
private static CancellationTokenSource _tokenSource = new();
private static long _startTimestamp;
private static ILogger _logger = NullLogger.Instance;
private static bool _restartOnShutdown;
@ -86,11 +88,11 @@ namespace Jellyfin.Server
private static async Task StartApp(StartupOptions options)
{
var startTimestamp = Stopwatch.GetTimestamp();
_startTimestamp = Stopwatch.GetTimestamp();
// Log all uncaught exceptions to std error
static void UnhandledExceptionToConsole(object sender, UnhandledExceptionEventArgs e) =>
Console.Error.WriteLine("Unhandled Exception\n" + e.ExceptionObject.ToString());
Console.Error.WriteLine("Unhandled Exception\n" + e.ExceptionObject);
AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionToConsole;
ServerApplicationPaths appPaths = StartupHelpers.CreateApplicationPaths(options);
@ -151,14 +153,14 @@ namespace Jellyfin.Server
// If hosting the web client, validate the client content path
if (startupConfig.HostWebClient())
{
string? webContentPath = appPaths.WebPath;
var webContentPath = appPaths.WebPath;
if (!Directory.Exists(webContentPath) || !Directory.EnumerateFiles(webContentPath).Any())
{
_logger.LogError(
"The server is expected to host the web client, but the provided content directory is either " +
"invalid or empty: {WebContentPath}. If you do not want to host the web client with the " +
"server, you may set the '--nowebclient' command line flag, or set" +
"'{ConfigKey}=false' in your config settings.",
"'{ConfigKey}=false' in your config settings",
webContentPath,
HostWebClientKey);
Environment.ExitCode = 1;
@ -169,15 +171,31 @@ namespace Jellyfin.Server
StartupHelpers.PerformStaticInitialization();
Migrations.MigrationRunner.RunPreStartup(appPaths, _loggerFactory);
do
{
_restartOnShutdown = false;
await StartServer(appPaths, options, startupConfig).ConfigureAwait(false);
if (_restartOnShutdown)
{
_tokenSource = new CancellationTokenSource();
_startTimestamp = Stopwatch.GetTimestamp();
}
} while (_restartOnShutdown);
}
private static async Task StartServer(IServerApplicationPaths appPaths, StartupOptions options, IConfiguration startupConfig)
{
var appHost = new CoreAppHost(
appPaths,
_loggerFactory,
options,
startupConfig);
IHost? host = null;
try
{
var host = Host.CreateDefaultBuilder()
host = Host.CreateDefaultBuilder()
.ConfigureServices(services => appHost.Init(services))
.ConfigureWebHostDefaults(webHostBuilder => webHostBuilder.ConfigureWebHostBuilder(appHost, startupConfig, appPaths, _logger))
.ConfigureAppConfiguration(config => config.ConfigureAppConfiguration(options, appPaths, startupConfig))
@ -203,13 +221,13 @@ namespace Jellyfin.Server
}
catch (Exception ex) when (ex is not TaskCanceledException)
{
_logger.LogError("Kestrel failed to start! This is most likely due to an invalid address or port bind - correct your bind configuration in network.xml and try again.");
_logger.LogError("Kestrel failed to start! This is most likely due to an invalid address or port bind - correct your bind configuration in network.xml and try again");
throw;
}
await appHost.RunStartupTasksAsync(_tokenSource.Token).ConfigureAwait(false);
_logger.LogInformation("Startup complete {Time:g}", Stopwatch.GetElapsedTime(startTimestamp));
_logger.LogInformation("Startup complete {Time:g}", Stopwatch.GetElapsedTime(_startTimestamp));
// Block main thread until shutdown
await Task.Delay(-1, _tokenSource.Token).ConfigureAwait(false);
@ -220,7 +238,7 @@ namespace Jellyfin.Server
}
catch (Exception ex)
{
_logger.LogCritical(ex, "Error while starting server.");
_logger.LogCritical(ex, "Error while starting server");
}
finally
{
@ -240,11 +258,7 @@ namespace Jellyfin.Server
}
await appHost.DisposeAsync().ConfigureAwait(false);
}
if (_restartOnShutdown)
{
StartNewInstance(options);
host?.Dispose();
}
}
@ -282,44 +296,5 @@ namespace Jellyfin.Server
.AddEnvironmentVariables("JELLYFIN_")
.AddInMemoryCollection(commandLineOpts.ConvertToConfig());
}
private static void StartNewInstance(StartupOptions options)
{
_logger.LogInformation("Starting new instance");
var module = options.RestartPath;
if (string.IsNullOrWhiteSpace(module))
{
module = Environment.GetCommandLineArgs()[0];
}
string commandLineArgsString;
if (options.RestartArgs is not null)
{
commandLineArgsString = options.RestartArgs;
}
else
{
commandLineArgsString = string.Join(
' ',
Environment.GetCommandLineArgs().Skip(1).Select(NormalizeCommandLineArgument));
}
_logger.LogInformation("Executable: {0}", module);
_logger.LogInformation("Arguments: {0}", commandLineArgsString);
Process.Start(module, commandLineArgsString);
}
private static string NormalizeCommandLineArgument(string arg)
{
if (!arg.Contains(' ', StringComparison.Ordinal))
{
return arg;
}
return "\"" + arg + "\"";
}
}
}

8
Jellyfin.Server/StartupOptions.cs
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@ -63,14 +63,6 @@ namespace Jellyfin.Server
[Option("package-name", Required = false, HelpText = "Used when packaging Jellyfin (example, synology).")]
public string? PackageName { get; set; }
/// <inheritdoc />
[Option("restartpath", Required = false, HelpText = "Path to restart script.")]
public string? RestartPath { get; set; }
/// <inheritdoc />
[Option("restartargs", Required = false, HelpText = "Arguments for restart script.")]
public string? RestartArgs { get; set; }
/// <inheritdoc />
[Option("published-server-url", Required = false, HelpText = "Jellyfin Server URL to publish via auto discover process")]
public string? PublishedServerUrl { get; set; }

6
MediaBrowser.Common/IApplicationHost.cs
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@ -47,12 +47,6 @@ namespace MediaBrowser.Common
/// <value><c>true</c> if this instance is shutting down; otherwise, <c>false</c>.</value>
bool IsShuttingDown { get; }
/// <summary>
/// Gets a value indicating whether this instance can self restart.
/// </summary>
/// <value><c>true</c> if this instance can self restart; otherwise, <c>false</c>.</value>
bool CanSelfRestart { get; }
/// <summary>
/// Gets the application version.
/// </summary>

5
MediaBrowser.Common/Plugins/IPluginManager.cs
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@ -29,6 +29,11 @@ namespace MediaBrowser.Common.Plugins
/// <returns>An IEnumerable{Assembly}.</returns>
IEnumerable<Assembly> LoadAssemblies();
/// <summary>
/// Unloads all of the assemblies.
/// </summary>
void UnloadAssemblies();
/// <summary>
/// Registers the plugin's services with the DI.
/// Note: DI is not yet instantiated yet.

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