Fix event log webpage title

Agent/Phantom.Agent.Minecraft/Instance/InstanceProperties.cs

@@ -1,6 +1,7 @@
 using System.Collections.Immutable;
 using Phantom.Agent.Minecraft.Java;
 using Phantom.Agent.Minecraft.Properties;
+using Phantom.Common.Data.Instance;
 
 namespace Phantom.Agent.Minecraft.Instance;
 
@@ -11,5 +12,6 @@ public sealed record InstanceProperties(
 	ImmutableArray<string> JvmArguments,
 	string InstanceFolder,
 	string ServerVersion,
-	ServerProperties ServerProperties
+	ServerProperties ServerProperties,
+	InstanceLaunchProperties LaunchProperties
 );

Agent/Phantom.Agent.Minecraft/Launcher/BaseLauncher.cs

@@ -11,6 +11,8 @@ namespace Phantom.Agent.Minecraft.Launcher;
 
 public abstract class BaseLauncher {
 	private readonly InstanceProperties instanceProperties;
+	
+	protected string MinecraftVersion => instanceProperties.ServerVersion;
 
 	private protected BaseLauncher(InstanceProperties instanceProperties) {
 		this.instanceProperties = instanceProperties;
@@ -25,11 +27,34 @@ public abstract class BaseLauncher {
 			return new LaunchResult.InvalidJvmArguments();
 		}
 
-		var vanillaServerJarPath = await services.ServerExecutables.DownloadAndGetPath(instanceProperties.ServerVersion, downloadProgressEventHandler, cancellationToken);
+		var vanillaServerJarPath = await services.ServerExecutables.DownloadAndGetPath(instanceProperties.LaunchProperties.ServerDownloadInfo, MinecraftVersion, downloadProgressEventHandler, cancellationToken);
 		if (vanillaServerJarPath == null) {
 			return new LaunchResult.CouldNotDownloadMinecraftServer();
 		}
 
+		ServerJarInfo? serverJar;
+		try {
+			serverJar = await PrepareServerJar(logger, vanillaServerJarPath, instanceProperties.InstanceFolder, cancellationToken);
+		} catch (OperationCanceledException) {
+			throw;
+		} catch (Exception e) {
+			logger.Error(e, "Caught exception while preparing the server jar.");
+			return new LaunchResult.CouldNotPrepareMinecraftServerLauncher();
+		}
+
+		if (!File.Exists(serverJar.FilePath)) {
+			logger.Error("Missing prepared server or launcher jar: {FilePath}", serverJar.FilePath);
+			return new LaunchResult.CouldNotPrepareMinecraftServerLauncher();
+		}
+
+		try {
+			await AcceptEula(instanceProperties);
+			await UpdateServerProperties(instanceProperties);
+		} catch (Exception e) {
+			logger.Error(e, "Caught exception while configuring the server.");
+			return new LaunchResult.CouldNotConfigureMinecraftServer();
+		}
+		
 		var startInfo = new ProcessStartInfo {
 			FileName = javaRuntimeExecutable.ExecutablePath,
 			WorkingDirectory = instanceProperties.InstanceFolder,
@@ -43,24 +68,20 @@ public abstract class BaseLauncher {
 		var jvmArguments = new JvmArgumentBuilder(instanceProperties.JvmProperties, instanceProperties.JvmArguments);
 		CustomizeJvmArguments(jvmArguments);
 
-		var serverJarPath = await PrepareServerJar(vanillaServerJarPath, instanceProperties.InstanceFolder, cancellationToken);
 		var processArguments = startInfo.ArgumentList;
 		jvmArguments.Build(processArguments);
+		
+		foreach (var extraArgument in serverJar.ExtraArgs) {
+			processArguments.Add(extraArgument);
+		}
+		
 		processArguments.Add("-jar");
-		processArguments.Add(serverJarPath);
+		processArguments.Add(serverJar.FilePath);
 		processArguments.Add("nogui");
 
 		var process = new Process { StartInfo = startInfo };
 		var instanceProcess = new InstanceProcess(instanceProperties, process);
 
-		try {
-			await AcceptEula(instanceProperties);
-			await UpdateServerProperties(instanceProperties);
-		} catch (Exception e) {
-			logger.Error(e, "Caught exception while configuring the server.");
-			return new LaunchResult.CouldNotConfigureMinecraftServer();
-		}
-
 		try {
 			process.Start();
 			process.BeginOutputReadLine();
@@ -82,8 +103,8 @@ public abstract class BaseLauncher {
 
 	private protected virtual void CustomizeJvmArguments(JvmArgumentBuilder arguments) {}
 
-	private protected virtual Task<string> PrepareServerJar(string serverJarPath, string instanceFolderPath, CancellationToken cancellationToken) {
-		return Task.FromResult(serverJarPath);
+	private protected virtual Task<ServerJarInfo> PrepareServerJar(ILogger logger, string serverJarPath, string instanceFolderPath, CancellationToken cancellationToken) {
+		return Task.FromResult(new ServerJarInfo(serverJarPath));
 	}
 
 	private static async Task AcceptEula(InstanceProperties instanceProperties) {

Agent/Phantom.Agent.Minecraft/Launcher/LaunchResult.cs

@@ -13,6 +13,8 @@ public abstract record LaunchResult {
 
 	public sealed record CouldNotDownloadMinecraftServer : LaunchResult;
 	
+	public sealed record CouldNotPrepareMinecraftServerLauncher : LaunchResult;
+	
 	public sealed record CouldNotConfigureMinecraftServer : LaunchResult;
 	
 	public sealed record CouldNotStartMinecraftServer : LaunchResult;

Agent/Phantom.Agent.Minecraft/Launcher/ServerJarInfo.cs

@@ -0,0 +1,7 @@
+using System.Collections.Immutable;
+
+namespace Phantom.Agent.Minecraft.Launcher;
+
+sealed record ServerJarInfo(string FilePath, ImmutableArray<string> ExtraArgs) {
+	public ServerJarInfo(string filePath) : this(filePath, ImmutableArray<string>.Empty) {}
+}

Agent/Phantom.Agent.Minecraft/Phantom.Agent.Minecraft.csproj

@@ -17,6 +17,7 @@
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Collections\Phantom.Utils.Collections.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Cryptography\Phantom.Utils.Cryptography.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.IO\Phantom.Utils.IO.csproj" />
+    <ProjectReference Include="..\..\Utils\Phantom.Utils.Runtime\Phantom.Utils.Runtime.csproj" />
   </ItemGroup>
 
 </Project>

Agent/Phantom.Agent.Minecraft/Server/MinecraftServerExecutableDownloader.cs

@@ -1,6 +1,6 @@
 using System.Security.Cryptography;
+using Phantom.Common.Data.Minecraft;
 using Phantom.Common.Logging;
-using Phantom.Common.Minecraft;
 using Phantom.Utils.Cryptography;
 using Phantom.Utils.IO;
 using Phantom.Utils.Runtime;
@@ -11,8 +11,6 @@ namespace Phantom.Agent.Minecraft.Server;
 sealed class MinecraftServerExecutableDownloader {
 	private static readonly ILogger Logger = PhantomLogger.Create<MinecraftServerExecutableDownloader>();
 
-	private readonly MinecraftVersions minecraftVersions;
-	
 	public Task<string?> Task { get; }
 	public event EventHandler<DownloadProgressEventArgs>? DownloadProgress;
 	public event EventHandler? Completed;
@@ -20,11 +18,9 @@ sealed class MinecraftServerExecutableDownloader {
 	private readonly CancellationTokenSource cancellationTokenSource = new ();
 	private int listeners = 0;
 
-	public MinecraftServerExecutableDownloader(MinecraftVersions minecraftVersions, string version, string filePath, MinecraftServerExecutableDownloadListener listener) {
-		this.minecraftVersions = minecraftVersions;
-		
+	public MinecraftServerExecutableDownloader(FileDownloadInfo fileDownloadInfo, string minecraftVersion, string filePath, MinecraftServerExecutableDownloadListener listener) {
 		Register(listener);
-		Task = DownloadAndGetPath(version, filePath);
+		Task = DownloadAndGetPath(fileDownloadInfo, minecraftVersion, filePath);
 		Task.ContinueWith(OnCompleted, TaskScheduler.Default);
 	}
 
@@ -72,33 +68,26 @@ sealed class MinecraftServerExecutableDownloader {
 		}
 	}
 
-	private async Task<string?> DownloadAndGetPath(string version, string filePath) {
-		Logger.Information("Downloading server version {Version}...", version);
-
+	private async Task<string?> DownloadAndGetPath(FileDownloadInfo fileDownloadInfo, string minecraftVersion, string filePath) {
 		string tmpFilePath = filePath + ".tmp";
 
 		var cancellationToken = cancellationTokenSource.Token;
 		try {
-			var serverExecutableInfo = await minecraftVersions.GetServerExecutableInfo(version, cancellationToken);
-			if (serverExecutableInfo == null) {
-				return null;
-			}
-
-			Logger.Information("Downloading server executable from: {Url} ({Size})", serverExecutableInfo.DownloadUrl, serverExecutableInfo.Size.ToHumanReadable(decimalPlaces: 1));
+			Logger.Information("Downloading server version {Version} from: {Url} ({Size})", minecraftVersion, fileDownloadInfo.DownloadUrl, fileDownloadInfo.Size.ToHumanReadable(decimalPlaces: 1));
 			try {
 				using var http = new HttpClient();
-				await FetchServerExecutableFile(http, new DownloadProgressCallback(this), serverExecutableInfo, tmpFilePath, cancellationToken);
+				await FetchServerExecutableFile(http, new DownloadProgressCallback(this), fileDownloadInfo, tmpFilePath, cancellationToken);
 			} catch (Exception) {
 				TryDeleteExecutableAfterFailure(tmpFilePath);
 				throw;
 			}
 
 			File.Move(tmpFilePath, filePath, true);
-			Logger.Information("Server version {Version} downloaded.", version);
+			Logger.Information("Server version {Version} downloaded.", minecraftVersion);
 
 			return filePath;
 		} catch (OperationCanceledException) {
-			Logger.Information("Download for server version {Version} was cancelled.", version);
+			Logger.Information("Download for server version {Version} was cancelled.", minecraftVersion);
 			throw;
 		} catch (StopProcedureException) {
 			return null;
@@ -110,17 +99,17 @@ sealed class MinecraftServerExecutableDownloader {
 		}
 	}
 
-	private static async Task FetchServerExecutableFile(HttpClient http, DownloadProgressCallback progressCallback, MinecraftServerExecutableInfo info, string filePath, CancellationToken cancellationToken) {
+	private static async Task FetchServerExecutableFile(HttpClient http, DownloadProgressCallback progressCallback, FileDownloadInfo fileDownloadInfo, string filePath, CancellationToken cancellationToken) {
 		Sha1String downloadedFileHash;
 
 		try {
-			var response = await http.GetAsync(info.DownloadUrl, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+			var response = await http.GetAsync(fileDownloadInfo.DownloadUrl, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
 			response.EnsureSuccessStatusCode();
 
 			await using var fileStream = new FileStream(filePath, FileMode.CreateNew, FileAccess.Write, FileShare.Read);
 			await using var responseStream = await response.Content.ReadAsStreamAsync(cancellationToken);
 
-			using var streamCopier = new MinecraftServerDownloadStreamCopier(progressCallback, info.Size.Bytes);
+			using var streamCopier = new MinecraftServerDownloadStreamCopier(progressCallback, fileDownloadInfo.Size.Bytes);
 			downloadedFileHash = await streamCopier.Copy(responseStream, fileStream, cancellationToken);
 		} catch (OperationCanceledException) {
 			throw;
@@ -129,8 +118,8 @@ sealed class MinecraftServerExecutableDownloader {
 			throw StopProcedureException.Instance;
 		}
 
-		if (!downloadedFileHash.Equals(info.Hash)) {
-			Logger.Error("Downloaded server executable has mismatched SHA1 hash. Expected {Expected}, got {Actual}.", info.Hash, downloadedFileHash);
+		if (!downloadedFileHash.Equals(fileDownloadInfo.Hash)) {
+			Logger.Error("Downloaded server executable has mismatched SHA1 hash. Expected {Expected}, got {Actual}.", fileDownloadInfo.Hash, downloadedFileHash);
 			throw StopProcedureException.Instance;
 		}
 	}

Agent/Phantom.Agent.Minecraft/Server/MinecraftServerExecutables.cs

@@ -1,33 +1,37 @@
 using System.Text.RegularExpressions;
+using Phantom.Common.Data.Minecraft;
 using Phantom.Common.Logging;
-using Phantom.Common.Minecraft;
 using Phantom.Utils.IO;
 using Serilog;
 
 namespace Phantom.Agent.Minecraft.Server;
 
-public sealed partial class MinecraftServerExecutables : IDisposable {
+public sealed partial class MinecraftServerExecutables {
 	private static readonly ILogger Logger = PhantomLogger.Create<MinecraftServerExecutables>();
 
 	[GeneratedRegex(@"[^a-zA-Z0-9_\-\.]", RegexOptions.Compiled)]
 	private static partial Regex VersionFolderSanitizeRegex();
 
 	private readonly string basePath;
-	private readonly MinecraftVersions minecraftVersions = new ();
 	private readonly Dictionary<string, MinecraftServerExecutableDownloader> runningDownloadersByVersion = new ();
 
 	public MinecraftServerExecutables(string basePath) {
 		this.basePath = basePath;
 	}
 
-	internal async Task<string?> DownloadAndGetPath(string version, EventHandler<DownloadProgressEventArgs> progressEventHandler, CancellationToken cancellationToken) {
-		string serverExecutableFolderPath = Path.Combine(basePath, VersionFolderSanitizeRegex().Replace(version, "_"));
+	internal async Task<string?> DownloadAndGetPath(FileDownloadInfo? fileDownloadInfo, string minecraftVersion, EventHandler<DownloadProgressEventArgs> progressEventHandler, CancellationToken cancellationToken) {
+		string serverExecutableFolderPath = Path.Combine(basePath, VersionFolderSanitizeRegex().Replace(minecraftVersion, "_"));
 		string serverExecutableFilePath = Path.Combine(serverExecutableFolderPath, "server.jar");
 
 		if (File.Exists(serverExecutableFilePath)) {
 			return serverExecutableFilePath;
 		}
 
+		if (fileDownloadInfo == null) {
+			Logger.Error("Unable to download server executable for version {Version} because no download info was provided.", minecraftVersion);
+			return null;
+		}
+
 		try {
 			Directories.Create(serverExecutableFolderPath, Chmod.URWX_GRX);
 		} catch (Exception e) {
@@ -39,26 +43,22 @@ public sealed partial class MinecraftServerExecutables : IDisposable {
 		MinecraftServerExecutableDownloadListener listener = new (progressEventHandler, cancellationToken);
 
 		lock (this) {
-			if (runningDownloadersByVersion.TryGetValue(version, out downloader)) {
-				Logger.Information("A download for server version {Version} is already running, waiting for it to finish...", version);
+			if (runningDownloadersByVersion.TryGetValue(minecraftVersion, out downloader)) {
+				Logger.Information("A download for server version {Version} is already running, waiting for it to finish...", minecraftVersion);
 				downloader.Register(listener);
 			}
 			else {
-				downloader = new MinecraftServerExecutableDownloader(minecraftVersions, version, serverExecutableFilePath, listener);
+				downloader = new MinecraftServerExecutableDownloader(fileDownloadInfo, minecraftVersion, serverExecutableFilePath, listener);
 				downloader.Completed += (_, _) => {
 					lock (this) {
-						runningDownloadersByVersion.Remove(version);
+						runningDownloadersByVersion.Remove(minecraftVersion);
 					}
 				};
 
-				runningDownloadersByVersion[version] = downloader;
+				runningDownloadersByVersion[minecraftVersion] = downloader;
 			}
 		}
 
 		return await downloader.Task.WaitAsync(cancellationToken);
 	}
-
-	public void Dispose() {
-		minecraftVersions.Dispose();
-	}
 }

Agent/Phantom.Agent.Services/Backups/BackupCompressor.cs

@@ -1,15 +1,17 @@
 using System.Diagnostics;
 using Phantom.Common.Logging;
+using Phantom.Utils.Runtime;
 using Serilog;
 
 namespace Phantom.Agent.Services.Backups; 
 
 static class BackupCompressor {
 	private static ILogger Logger { get; } = PhantomLogger.Create(nameof(BackupCompressor));
+	private static ILogger ZstdLogger { get; } = PhantomLogger.Create(nameof(BackupCompressor), "Zstd");
 	
-	private const int Quality = 10;
-	private const int Memory = 26;
-	private const int Threads = 3;
+	private const string Quality = "-10";
+	private const string Memory = "--long=26";
+	private const string Threads = "-T3";
 	
 	public static async Task<string?> Compress(string sourceFilePath, CancellationToken cancellationToken) {
 		if (sourceFilePath.Contains('"')) {
@@ -38,66 +40,31 @@ static class BackupCompressor {
 			Logger.Error("Invalid destination path: {Path}", destinationFilePath);
 			return false;
 		}
-		
+
 		var startInfo = new ProcessStartInfo {
 			FileName = "zstd",
 			WorkingDirectory = workingDirectory,
-			Arguments = $"-{Quality} --long={Memory} -T{Threads} -c --rm --no-progress -c -o \"{destinationFilePath}\" -- \"{sourceFilePath}\"",
-			RedirectStandardOutput = true,
-			RedirectStandardError = true
+			ArgumentList = {
+				Quality,
+				Memory,
+				Threads,
+				"-c",
+				"--rm",
+				"--no-progress",
+				"-c",
+				"-o", destinationFilePath,
+				"--", sourceFilePath
+			}
 		};
 
-		using var process = new Process { StartInfo = startInfo };
-		process.OutputDataReceived += OnZstdProcessOutput;
-		process.ErrorDataReceived += OnZstdProcessOutput;
-
-		try {
-			process.Start();
-			process.BeginOutputReadLine();
-			process.BeginErrorReadLine();
-		} catch (Exception e) {
-			Logger.Error(e, "Caught exception launching zstd process.");
+		static void OnZstdOutput(object? sender, DataReceivedEventArgs e) {
+			if (!string.IsNullOrWhiteSpace(e.Data)) {
+				ZstdLogger.Verbose("[Output] {Line}", e.Data);
+			}
 		}
 
-		try {
-			await process.WaitForExitAsync(cancellationToken);
-		} catch (OperationCanceledException) {
-			await TryKillProcess(process);
-			return false;
-		} catch (Exception e) {
-			Logger.Error(e, "Caught exception waiting for zstd process to exit.");
-			return false;
-		}
-
-		if (!process.HasExited) {
-			await TryKillProcess(process);
-			return false;
-		}
-
-		if (process.ExitCode != 0) {
-			Logger.Error("Zstd process exited with code {ExitCode}.", process.ExitCode);
-			return false;
-		}
-
-		return true;
-	}
-
-	private static void OnZstdProcessOutput(object sender, DataReceivedEventArgs e) {
-		if (!string.IsNullOrWhiteSpace(e.Data)) {
-			Logger.Verbose("[Zstd] {Line}", e.Data);
-		}
-	}
-
-	private static async Task TryKillProcess(Process process) {
-		CancellationTokenSource timeout = new CancellationTokenSource(TimeSpan.FromSeconds(1));
-
-		try {
-			process.Kill();
-			await process.WaitForExitAsync(timeout.Token);
-		} catch (OperationCanceledException) {
-			Logger.Error("Timed out waiting for killed zstd process to exit.");
-		} catch (Exception e) {
-			Logger.Error(e, "Caught exception killing zstd process.");
-		}
+		var process = new OneShotProcess(ZstdLogger, startInfo);
+		process.Output += OnZstdOutput;
+		return await process.Run(cancellationToken);
 	}
 }

Agent/Phantom.Agent.Services/Instances/InstanceSessionManager.cs

@@ -71,7 +71,7 @@ sealed class InstanceSessionManager : IDisposable {
 		});
 	}
 
-	public async Task<InstanceActionResult<ConfigureInstanceResult>> Configure(InstanceConfiguration configuration) {
+	public async Task<InstanceActionResult<ConfigureInstanceResult>> Configure(InstanceConfiguration configuration, InstanceLaunchProperties launchProperties, bool launchNow) {
 		return await AcquireSemaphoreAndRun(async () => {
 			var instanceGuid = configuration.InstanceGuid;
 			var instanceFolder = Path.Combine(basePath, instanceGuid.ToString());
@@ -90,7 +90,8 @@ sealed class InstanceSessionManager : IDisposable {
 				configuration.JvmArguments,
 				instanceFolder,
 				configuration.MinecraftVersion,
-				new ServerProperties(configuration.ServerPort, configuration.RconPort)
+				new ServerProperties(configuration.ServerPort, configuration.RconPort),
+				launchProperties
 			);
 
 			BaseLauncher launcher = new VanillaLauncher(properties);
@@ -105,7 +106,7 @@ sealed class InstanceSessionManager : IDisposable {
 				Logger.Information("Created instance \"{Name}\" (GUID {Guid}).", configuration.InstanceName, configuration.InstanceGuid);
 			}
 
-			if (configuration.LaunchAutomatically) {
+			if (launchNow) {
 				await LaunchInternal(instance);
 			}
 
@@ -179,7 +180,6 @@ sealed class InstanceSessionManager : IDisposable {
 
 	public void Dispose() {
 		DisposeAllInstances();
-		minecraftServerExecutables.Dispose();
 		shutdownCancellationTokenSource.Dispose();
 		semaphore.Dispose();
 	}

Agent/Phantom.Agent.Services/Instances/States/InstanceLaunchingState.cs

@@ -48,6 +48,9 @@ sealed class InstanceLaunchingState : IInstanceState, IDisposable {
 		else if (launchResult is LaunchResult.CouldNotDownloadMinecraftServer) {
 			throw new LaunchFailureException(InstanceLaunchFailReason.CouldNotDownloadMinecraftServer, "Session failed to launch, could not download Minecraft server.");
 		}
+		else if (launchResult is LaunchResult.CouldNotPrepareMinecraftServerLauncher) {
+			throw new LaunchFailureException(InstanceLaunchFailReason.CouldNotPrepareMinecraftServerLauncher, "Session failed to launch, could not prepare Minecraft server launcher.");
+		}
 		else if (launchResult is LaunchResult.CouldNotConfigureMinecraftServer) {
 			throw new LaunchFailureException(InstanceLaunchFailReason.CouldNotConfigureMinecraftServer, "Session failed to launch, could not configure Minecraft server.");
 		}

Agent/Phantom.Agent.Services/Rpc/MessageListener.cs

@@ -1,4 +1,5 @@
 using Phantom.Agent.Rpc;
+using Phantom.Common.Data.Instance;
 using Phantom.Common.Data.Replies;
 using Phantom.Common.Logging;
 using Phantom.Common.Messages;
@@ -26,12 +27,15 @@ public sealed class MessageListener : IMessageToAgentListener {
 	public async Task<NoReply> HandleRegisterAgentSuccess(RegisterAgentSuccessMessage message) {
 		Logger.Information("Agent authentication successful.");
 
-		foreach (var instanceInfo in message.InitialInstances) {
-			var result = await agent.InstanceSessionManager.Configure(instanceInfo);
+		void ShutdownAfterConfigurationFailed(InstanceConfiguration configuration) {
+			Logger.Fatal("Unable to configure instance \"{Name}\" (GUID {Guid}), shutting down.", configuration.InstanceName, configuration.InstanceGuid);
+			shutdownTokenSource.Cancel();
+		}
+		
+		foreach (var configureInstanceMessage in message.InitialInstanceConfigurations) {
+			var result = await HandleConfigureInstance(configureInstanceMessage);
 			if (!result.Is(ConfigureInstanceResult.Success)) {
-				Logger.Fatal("Unable to configure instance \"{Name}\" (GUID {Guid}), shutting down.", instanceInfo.InstanceName, instanceInfo.InstanceGuid);
-
-				shutdownTokenSource.Cancel();
+				ShutdownAfterConfigurationFailed(configureInstanceMessage.Configuration);
 				return NoReply.Instance;
 			}
 		}
@@ -56,7 +60,7 @@ public sealed class MessageListener : IMessageToAgentListener {
 	}
 	
 	public async Task<InstanceActionResult<ConfigureInstanceResult>> HandleConfigureInstance(ConfigureInstanceMessage message) {
-		return await agent.InstanceSessionManager.Configure(message.Configuration);
+		return await agent.InstanceSessionManager.Configure(message.Configuration, message.LaunchProperties, message.LaunchNow);
 	}
 
 	public async Task<InstanceActionResult<LaunchInstanceResult>> HandleLaunchInstance(LaunchInstanceMessage message) {

Common/Phantom.Common.Data/Instance/InstanceConfiguration.cs

@@ -15,6 +15,5 @@ public sealed partial record InstanceConfiguration(
 	[property: MemoryPackOrder(6)] MinecraftServerKind MinecraftServerKind,
 	[property: MemoryPackOrder(7)] RamAllocationUnits MemoryAllocation,
 	[property: MemoryPackOrder(8)] Guid JavaRuntimeGuid,
-	[property: MemoryPackOrder(9)] ImmutableArray<string> JvmArguments,
-	[property: MemoryPackOrder(10)] bool LaunchAutomatically
+	[property: MemoryPackOrder(9)] ImmutableArray<string> JvmArguments
 );

Common/Phantom.Common.Data/Instance/InstanceLaunchFailReason.cs

@@ -10,22 +10,24 @@ public enum InstanceLaunchFailReason : byte {
 	InvalidJvmArguments,
 	CouldNotDownloadMinecraftServer,
 	CouldNotConfigureMinecraftServer,
+	CouldNotPrepareMinecraftServerLauncher,
 	CouldNotStartMinecraftServer
 }
 
 public static class InstanceLaunchFailReasonExtensions {
 	public static string ToSentence(this InstanceLaunchFailReason reason) {
 		return reason switch {
-			InstanceLaunchFailReason.ServerPortNotAllowed             => "Server port not allowed.",
-			InstanceLaunchFailReason.ServerPortAlreadyInUse           => "Server port already in use.",
-			InstanceLaunchFailReason.RconPortNotAllowed               => "Rcon port not allowed.",
-			InstanceLaunchFailReason.RconPortAlreadyInUse             => "Rcon port already in use.",
-			InstanceLaunchFailReason.JavaRuntimeNotFound              => "Java runtime not found.",
-			InstanceLaunchFailReason.InvalidJvmArguments              => "Invalid JVM arguments.",
-			InstanceLaunchFailReason.CouldNotDownloadMinecraftServer  => "Could not download Minecraft server.",
-			InstanceLaunchFailReason.CouldNotConfigureMinecraftServer => "Could not configure Minecraft server.",
-			InstanceLaunchFailReason.CouldNotStartMinecraftServer     => "Could not start Minecraft server.",
-			_                                                         => "Unknown error."
+			InstanceLaunchFailReason.ServerPortNotAllowed                   => "Server port not allowed.",
+			InstanceLaunchFailReason.ServerPortAlreadyInUse                 => "Server port already in use.",
+			InstanceLaunchFailReason.RconPortNotAllowed                     => "Rcon port not allowed.",
+			InstanceLaunchFailReason.RconPortAlreadyInUse                   => "Rcon port already in use.",
+			InstanceLaunchFailReason.JavaRuntimeNotFound                    => "Java runtime not found.",
+			InstanceLaunchFailReason.InvalidJvmArguments                    => "Invalid JVM arguments.",
+			InstanceLaunchFailReason.CouldNotDownloadMinecraftServer        => "Could not download Minecraft server.",
+			InstanceLaunchFailReason.CouldNotConfigureMinecraftServer       => "Could not configure Minecraft server.",
+			InstanceLaunchFailReason.CouldNotPrepareMinecraftServerLauncher => "Could not prepare Minecraft server launcher.",
+			InstanceLaunchFailReason.CouldNotStartMinecraftServer           => "Could not start Minecraft server.",
+			_                                                               => "Unknown error."
 		};
 	}
 }

Common/Phantom.Common.Data/Instance/InstanceLaunchProperties.cs

@@ -0,0 +1,9 @@
+using MemoryPack;
+using Phantom.Common.Data.Minecraft;
+
+namespace Phantom.Common.Data.Instance; 
+
+[MemoryPackable]
+public sealed partial record InstanceLaunchProperties(
+	[property: MemoryPackOrder(0)] FileDownloadInfo? ServerDownloadInfo
+);

Common/Phantom.Common.Data/Minecraft/FileDownloadInfo.cs

@@ -0,0 +1,30 @@
+using MemoryPack;
+using Phantom.Utils.Cryptography;
+using Phantom.Utils.IO;
+
+namespace Phantom.Common.Data.Minecraft; 
+
+[MemoryPackable]
+public sealed partial class FileDownloadInfo {
+	[MemoryPackOrder(0)]
+	public string DownloadUrl { get; }
+	
+	[MemoryPackOrder(1)]
+	[MemoryPackInclude]
+	private readonly string hash;
+	
+	[MemoryPackIgnore]
+	public Sha1String Hash => Sha1String.FromString(hash);
+	
+	[MemoryPackOrder(2)]
+	public FileSize Size { get; }
+	
+	public FileDownloadInfo(string downloadUrl, Sha1String hash, FileSize size) : this(downloadUrl, hash.ToString(), size) {}
+
+	[MemoryPackConstructor]
+	private FileDownloadInfo(string downloadUrl, string hash, FileSize size) {
+		this.DownloadUrl = downloadUrl;
+		this.hash = hash;
+		this.Size = size;
+	}
+}

Common/Phantom.Common.Messages/ToAgent/ConfigureInstanceMessage.cs

@@ -6,7 +6,9 @@ namespace Phantom.Common.Messages.ToAgent;
 
 [MemoryPackable]
 public sealed partial record ConfigureInstanceMessage(
-	[property: MemoryPackOrder(0)] InstanceConfiguration Configuration
+	[property: MemoryPackOrder(0)] InstanceConfiguration Configuration,
+	[property: MemoryPackOrder(1)] InstanceLaunchProperties LaunchProperties,
+	[property: MemoryPackOrder(2)] bool LaunchNow = false
 ) : IMessageToAgent<InstanceActionResult<ConfigureInstanceResult>> {
 	public Task<InstanceActionResult<ConfigureInstanceResult>> Accept(IMessageToAgentListener listener) {
 		return listener.HandleConfigureInstance(this);

Common/Phantom.Common.Messages/ToAgent/RegisterAgentSuccessMessage.cs

@@ -1,13 +1,12 @@
 using System.Collections.Immutable;
 using MemoryPack;
-using Phantom.Common.Data.Instance;
 using Phantom.Utils.Rpc.Message;
 
 namespace Phantom.Common.Messages.ToAgent;
 
 [MemoryPackable]
 public sealed partial record RegisterAgentSuccessMessage(
-	[property: MemoryPackOrder(0)] ImmutableArray<InstanceConfiguration> InitialInstances
+	[property: MemoryPackOrder(0)] ImmutableArray<ConfigureInstanceMessage> InitialInstanceConfigurations
 ) : IMessageToAgent {
 	public Task<NoReply> Accept(IMessageToAgentListener listener) {
 		return listener.HandleRegisterAgentSuccess(this);

Common/Phantom.Common.Minecraft/MinecraftServerExecutableInfo.cs

@@ -1,10 +0,0 @@
-using Phantom.Utils.Cryptography;
-using Phantom.Utils.IO;
-
-namespace Phantom.Common.Minecraft; 
-
-public sealed record MinecraftServerExecutableInfo(
-	string DownloadUrl,
-	Sha1String Hash,
-	FileSize Size
-);

Common/Phantom.Common.Minecraft/Phantom.Common.Minecraft.csproj

@@ -6,11 +6,4 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   
-  <ItemGroup>
-    <ProjectReference Include="..\..\Utils\Phantom.Utils.IO\Phantom.Utils.IO.csproj" />
-    <ProjectReference Include="..\..\Utils\Phantom.Utils.Runtime\Phantom.Utils.Runtime.csproj" />
-    <ProjectReference Include="..\Phantom.Common.Data\Phantom.Common.Data.csproj" />
-    <ProjectReference Include="..\Phantom.Common.Logging\Phantom.Common.Logging.csproj" />
-  </ItemGroup>
-  
 </Project>

PhantomPanel.sln

@@ -36,6 +36,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Phantom.Server.Database", "
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Phantom.Server.Database.Postgres", "Server\Phantom.Server.Database.Postgres\Phantom.Server.Database.Postgres.csproj", "{81625B4A-3DB6-48BD-A739-D23DA02107D1}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Phantom.Server.Minecraft", "Server\Phantom.Server.Minecraft\Phantom.Server.Minecraft.csproj", "{4B3B73E6-48DD-4846-87FD-DFB86619B67C}"
+EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Phantom.Server.Rpc", "Server\Phantom.Server.Rpc\Phantom.Server.Rpc.csproj", "{79312D72-44E0-431D-96A4-4C0A066B9671}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Phantom.Server.Services", "Server\Phantom.Server.Services\Phantom.Server.Services.csproj", "{90F0F1B1-EB0A-49C9-8DF0-1153A87F77C9}"
@@ -118,6 +120,10 @@ Global
 		{81625B4A-3DB6-48BD-A739-D23DA02107D1}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{81625B4A-3DB6-48BD-A739-D23DA02107D1}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{81625B4A-3DB6-48BD-A739-D23DA02107D1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4B3B73E6-48DD-4846-87FD-DFB86619B67C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4B3B73E6-48DD-4846-87FD-DFB86619B67C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4B3B73E6-48DD-4846-87FD-DFB86619B67C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4B3B73E6-48DD-4846-87FD-DFB86619B67C}.Release|Any CPU.Build.0 = Release|Any CPU
 		{79312D72-44E0-431D-96A4-4C0A066B9671}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{79312D72-44E0-431D-96A4-4C0A066B9671}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{79312D72-44E0-431D-96A4-4C0A066B9671}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -184,6 +190,7 @@ Global
 		{A0F1C595-96B6-4DBF-8C16-6B99223F8F35} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}
 		{E3AD566F-384A-489A-A3BB-EA3BA400C18C} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}
 		{81625B4A-3DB6-48BD-A739-D23DA02107D1} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}
+		{4B3B73E6-48DD-4846-87FD-DFB86619B67C} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}
 		{79312D72-44E0-431D-96A4-4C0A066B9671} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}
 		{90F0F1B1-EB0A-49C9-8DF0-1153A87F77C9} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}
 		{7CA2E5FE-E507-4DC6-930C-E18711A9F856} = {8AC8FB6C-033A-4626-820F-ED0F908756B2}

Server/Phantom.Server.Minecraft/MinecraftVersions.cs

@@ -9,7 +9,7 @@ using Phantom.Utils.IO;
 using Phantom.Utils.Runtime;
 using Serilog;
 
-namespace Phantom.Common.Minecraft;
+namespace Phantom.Server.Minecraft;
 
 public sealed class MinecraftVersions : IDisposable {
 	private static readonly ILogger Logger = PhantomLogger.Create<MinecraftVersions>();
@@ -35,12 +35,7 @@ public sealed class MinecraftVersions : IDisposable {
 			return earlyResult;
 		}
 
-		try {
-			await cachedVersionsSemaphore.WaitAsync(cancellationToken);
-		} catch (OperationCanceledException) {
-			return ImmutableArray<MinecraftVersion>.Empty;
-		}
-
+		await cachedVersionsSemaphore.WaitAsync(cancellationToken);
 		try {
 			if (CachedVersionsUnlessExpired is {} racedResult) {
 				return racedResult;
@@ -64,7 +59,7 @@ public sealed class MinecraftVersions : IDisposable {
 		});
 	}
 
-	public async Task<MinecraftServerExecutableInfo?> GetServerExecutableInfo(string version, CancellationToken cancellationToken) {
+	public async Task<FileDownloadInfo?> GetServerExecutableInfo(string version, CancellationToken cancellationToken) {
 		return await FetchOrFailSilently(async () => {
 			var versions = await GetVersions(cancellationToken);
 			var versionObject = versions.FirstOrDefault(v => v.Id == version);
@@ -81,8 +76,6 @@ public sealed class MinecraftVersions : IDisposable {
 	private static async Task<T?> FetchOrFailSilently<T>(Func<Task<T?>> task) {
 		try {
 			return await task();
-		} catch (OperationCanceledException) {
-			return default;
 		} catch (StopProcedureException) {
 			return default;
 		} catch (Exception e) {
@@ -96,9 +89,7 @@ public sealed class MinecraftVersions : IDisposable {
 
 		try {
 			return await http.GetFromJsonAsync<JsonElement>(url, cancellationToken);
-		} catch (OperationCanceledException) {
-			throw StopProcedureException.Instance;
-		}  catch (HttpRequestException e) {
+		} catch (HttpRequestException e) {
 			Logger.Error(e, "Unable to download {Description}.", description);
 			throw StopProcedureException.Instance;
 		} catch (Exception e) {
@@ -117,7 +108,7 @@ public sealed class MinecraftVersions : IDisposable {
 			} catch (StopProcedureException) {}
 		}
 
-		return foundVersions.ToImmutable();
+		return foundVersions.MoveToImmutable();
 	}
 
 	private static MinecraftVersion GetVersionFromManifestEntry(JsonElement versionElement) {
@@ -148,7 +139,7 @@ public sealed class MinecraftVersions : IDisposable {
 		return new MinecraftVersion(id, type, url);
 	}
 
-	private static MinecraftServerExecutableInfo GetServerExecutableInfoFromMetadata(JsonElement versionMetadata) {
+	private static FileDownloadInfo GetServerExecutableInfoFromMetadata(JsonElement versionMetadata) {
 		JsonElement downloadsElement = GetJsonPropertyOrThrow(versionMetadata, "downloads", JsonValueKind.Object, "version metadata");
 		JsonElement serverElement = GetJsonPropertyOrThrow(downloadsElement, "server", JsonValueKind.Object, "downloads object in version metadata");
 		JsonElement urlElement = GetJsonPropertyOrThrow(serverElement, "url", JsonValueKind.String, "downloads.server object in version metadata");
@@ -182,7 +173,7 @@ public sealed class MinecraftVersions : IDisposable {
 			throw StopProcedureException.Instance;
 		}
 
-		return new MinecraftServerExecutableInfo(url, hash, new FileSize(size));
+		return new FileDownloadInfo(url, hash, new FileSize(size));
 	}
 
 	private static JsonElement GetJsonPropertyOrThrow(JsonElement parentElement, string propertyKey, JsonValueKind expectedKind, string location) {

Server/Phantom.Server.Minecraft/Phantom.Server.Minecraft.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  
+  <ItemGroup>
+    <ProjectReference Include="..\..\Common\Phantom.Common.Data\Phantom.Common.Data.csproj" />
+    <ProjectReference Include="..\..\Common\Phantom.Common.Logging\Phantom.Common.Logging.csproj" />
+    <ProjectReference Include="..\..\Utils\Phantom.Utils.Runtime\Phantom.Utils.Runtime.csproj" />
+  </ItemGroup>
+
+</Project>

Server/Phantom.Server.Services/Agents/AgentManager.cs

@@ -82,7 +82,9 @@ public sealed class AgentManager {
 
 		Logger.Information("Registered agent \"{Name}\" (GUID {Guid}).", agent.Name, agent.Guid);
 
-		await connection.Send(new RegisterAgentSuccessMessage(instanceManager.GetInstanceConfigurationsForAgent(agent.Guid)));
+		var instanceConfigurations = await instanceManager.GetInstanceConfigurationsForAgent(agent.Guid);
+		await connection.Send(new RegisterAgentSuccessMessage(instanceConfigurations));
+		
 		return true;
 	}
 

Server/Phantom.Server.Services/Instances/AddOrEditInstanceResult.cs

@@ -5,17 +5,19 @@ public enum AddOrEditInstanceResult : byte {
 	Success,
 	InstanceNameMustNotBeEmpty,
 	InstanceMemoryMustNotBeZero,
+	MinecraftVersionDownloadInfoNotFound,
 	AgentNotFound
 }
 
 public static class AddOrEditInstanceResultExtensions {
 	public static string ToSentence(this AddOrEditInstanceResult reason) {
 		return reason switch {
-			AddOrEditInstanceResult.Success                     => "Success.",
-			AddOrEditInstanceResult.InstanceNameMustNotBeEmpty  => "Instance name must not be empty.",
-			AddOrEditInstanceResult.InstanceMemoryMustNotBeZero => "Memory must not be 0 MB.",
-			AddOrEditInstanceResult.AgentNotFound               => "Agent not found.",
-			_                                                   => "Unknown error."
+			AddOrEditInstanceResult.Success                              => "Success.",
+			AddOrEditInstanceResult.InstanceNameMustNotBeEmpty           => "Instance name must not be empty.",
+			AddOrEditInstanceResult.InstanceMemoryMustNotBeZero          => "Memory must not be 0 MB.",
+			AddOrEditInstanceResult.MinecraftVersionDownloadInfoNotFound => "Could not find download information for the selected Minecraft version.",
+			AddOrEditInstanceResult.AgentNotFound                        => "Agent not found.",
+			_                                                            => "Unknown error."
 		};
 	}
 }

Server/Phantom.Server.Services/Instances/Instance.cs

@@ -4,7 +4,8 @@ namespace Phantom.Server.Services.Instances;
 
 public sealed record Instance(
 	InstanceConfiguration Configuration,
-	IInstanceStatus Status
+	IInstanceStatus Status,
+	bool LaunchAutomatically
 ) {
-	internal Instance(InstanceConfiguration configuration) : this(configuration, InstanceStatus.Offline) {}
+	internal Instance(InstanceConfiguration configuration, bool launchAutomatically = false) : this(configuration, InstanceStatus.Offline, launchAutomatically) {}
 }

Server/Phantom.Server.Services/Instances/InstanceManager.cs

@@ -10,6 +10,7 @@ using Phantom.Common.Messages.ToAgent;
 using Phantom.Common.Minecraft;
 using Phantom.Server.Database;
 using Phantom.Server.Database.Entities;
+using Phantom.Server.Minecraft;
 using Phantom.Server.Services.Agents;
 using Phantom.Utils.Collections;
 using Phantom.Utils.Events;
@@ -26,12 +27,14 @@ public sealed class InstanceManager {
 
 	private readonly CancellationToken cancellationToken;
 	private readonly AgentManager agentManager;
+	private readonly MinecraftVersions minecraftVersions;
 	private readonly DatabaseProvider databaseProvider;
 	private readonly SemaphoreSlim modifyInstancesSemaphore = new (1, 1);
 
-	public InstanceManager(ServiceConfiguration configuration, AgentManager agentManager, DatabaseProvider databaseProvider) {
+	public InstanceManager(ServiceConfiguration configuration, AgentManager agentManager, MinecraftVersions minecraftVersions, DatabaseProvider databaseProvider) {
 		this.cancellationToken = configuration.CancellationToken;
 		this.agentManager = agentManager;
+		this.minecraftVersions = minecraftVersions;
 		this.databaseProvider = databaseProvider;
 	}
 
@@ -49,11 +52,10 @@ public sealed class InstanceManager {
 				entity.MinecraftServerKind,
 				entity.MemoryAllocation,
 				entity.JavaRuntimeGuid,
-				JvmArgumentsHelper.Split(entity.JvmArguments),
-				entity.LaunchAutomatically
+				JvmArgumentsHelper.Split(entity.JvmArguments)
 			);
 
-			var instance = new Instance(configuration);
+			var instance = new Instance(configuration, entity.LaunchAutomatically);
 			instances.ByGuid[instance.Configuration.InstanceGuid] = instance;
 		}
 	}
@@ -73,22 +75,28 @@ public sealed class InstanceManager {
 			return InstanceActionResult.Concrete(AddOrEditInstanceResult.InstanceMemoryMustNotBeZero);
 		}
 		
+		var serverExecutableInfo = await minecraftVersions.GetServerExecutableInfo(configuration.MinecraftVersion, cancellationToken);
+		if (serverExecutableInfo == null) {
+			return InstanceActionResult.Concrete(AddOrEditInstanceResult.MinecraftVersionDownloadInfoNotFound);
+		}
+
 		InstanceActionResult<AddOrEditInstanceResult> result;
 		bool isNewInstance;
 
 		await modifyInstancesSemaphore.WaitAsync(cancellationToken);
 		try {
-			var instance = new Instance(configuration);
-			instances.ByGuid.AddOrReplace(instance.Configuration.InstanceGuid, instance, out var oldInstance);
-			
-			var reply = await agentManager.SendMessage<ConfigureInstanceMessage, InstanceActionResult<ConfigureInstanceResult>>(configuration.AgentGuid, new ConfigureInstanceMessage(configuration), TimeSpan.FromSeconds(10));
+			isNewInstance = !instances.ByGuid.TryReplace(configuration.InstanceGuid, instance => instance with { Configuration = configuration });
+			if (isNewInstance) {
+				instances.ByGuid.TryAdd(configuration.InstanceGuid, new Instance(configuration));
+			}
+
+			var message = new ConfigureInstanceMessage(configuration, new InstanceLaunchProperties(serverExecutableInfo));
+			var reply = await agentManager.SendMessage<ConfigureInstanceMessage, InstanceActionResult<ConfigureInstanceResult>>(configuration.AgentGuid, message, TimeSpan.FromSeconds(10));
 			
 			result = reply.DidNotReplyIfNull().Map(static result => result switch {
 				ConfigureInstanceResult.Success => AddOrEditInstanceResult.Success,
 				_                               => AddOrEditInstanceResult.UnknownError
 			});
-
-			isNewInstance = oldInstance == null;
 			
 			if (result.Is(AddOrEditInstanceResult.Success)) {
 				using var scope = databaseProvider.CreateScope();
@@ -103,7 +111,6 @@ public sealed class InstanceManager {
 				entity.MemoryAllocation = configuration.MemoryAllocation;
 				entity.JavaRuntimeGuid = configuration.JavaRuntimeGuid;
 				entity.JvmArguments = JvmArgumentsHelper.Join(configuration.JvmArguments);
-				entity.LaunchAutomatically = configuration.LaunchAutomatically;
 
 				await scope.Ctx.SaveChangesAsync(cancellationToken);
 			}
@@ -180,9 +187,7 @@ public sealed class InstanceManager {
 	private async Task SetInstanceShouldLaunchAutomatically(Guid instanceGuid, bool shouldLaunchAutomatically) {
 		await modifyInstancesSemaphore.WaitAsync(cancellationToken);
 		try {
-			instances.ByGuid.TryReplace(instanceGuid, instance => instance with {
-				Configuration = instance.Configuration with { LaunchAutomatically = shouldLaunchAutomatically }
-			});
+			instances.ByGuid.TryReplace(instanceGuid, instance => instance with { LaunchAutomatically = shouldLaunchAutomatically });
 
 			using var scope = databaseProvider.CreateScope();
 			var entity = await scope.Ctx.Instances.FindAsync(instanceGuid, cancellationToken);
@@ -199,8 +204,15 @@ public sealed class InstanceManager {
 		return await SendInstanceActionMessage<SendCommandToInstanceMessage, SendCommandToInstanceResult>(instanceGuid, new SendCommandToInstanceMessage(instanceGuid, command));
 	}
 
-	internal ImmutableArray<InstanceConfiguration> GetInstanceConfigurationsForAgent(Guid agentGuid) {
-		return instances.ByGuid.ValuesCopy.Select(static instance => instance.Configuration).Where(configuration => configuration.AgentGuid == agentGuid).ToImmutableArray();
+	internal async Task<ImmutableArray<ConfigureInstanceMessage>> GetInstanceConfigurationsForAgent(Guid agentGuid) {
+		var configurationMessages = ImmutableArray.CreateBuilder<ConfigureInstanceMessage>();
+		
+		foreach (var (configuration, _, launchAutomatically) in instances.ByGuid.ValuesCopy.Where(instance => instance.Configuration.AgentGuid == agentGuid)) {
+			var serverExecutableInfo = await minecraftVersions.GetServerExecutableInfo(configuration.MinecraftVersion, cancellationToken);
+			configurationMessages.Add(new ConfigureInstanceMessage(configuration, new InstanceLaunchProperties(serverExecutableInfo), launchAutomatically));
+		}
+
+		return configurationMessages.ToImmutable();
 	}
 
 	private sealed class ObservableInstances : ObservableState<ImmutableDictionary<Guid, Instance>> {

Server/Phantom.Server.Services/Phantom.Server.Services.csproj

@@ -16,6 +16,7 @@
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Collections\Phantom.Utils.Collections.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Events\Phantom.Utils.Events.csproj" />
     <ProjectReference Include="..\Phantom.Server.Database\Phantom.Server.Database.csproj" />
+    <ProjectReference Include="..\Phantom.Server.Minecraft\Phantom.Server.Minecraft.csproj" />
     <ProjectReference Include="..\Phantom.Server.Rpc\Phantom.Server.Rpc.csproj" />
   </ItemGroup>
 

Server/Phantom.Server.Web/Pages/Events.razor

@@ -4,15 +4,13 @@
 @using Phantom.Server.Services.Agents
 @using Phantom.Server.Services.Events
 @using Phantom.Server.Services.Instances
-@using Microsoft.AspNetCore.Identity
 @using Phantom.Server.Database.Enums
 @implements IDisposable
 @inject AgentManager AgentManager
 @inject EventLog EventLog
 @inject InstanceManager InstanceManager
-@inject UserManager<IdentityUser> UserManager
 
-<h1>Audit Log</h1>
+<h1>Event Log</h1>
 
 <table class="table">
   <thead>

Server/Phantom.Server.Web/Pages/Instances.razor

@@ -29,7 +29,7 @@
   </thead>
   @if (!instances.IsEmpty) {
     <tbody>
-      @foreach (var (configuration, status) in instances) {
+      @foreach (var (configuration, status, _) in instances) {
         var agentName = agentNames.TryGetValue(configuration.AgentGuid, out var name) ? name : string.Empty;
         var instanceGuid = configuration.InstanceGuid.ToString();
         <tr>

Server/Phantom.Server.Web/Shared/InstanceAddOrEditForm.razor

@@ -1,5 +1,6 @@
 @using Phantom.Common.Data.Minecraft
 @using Phantom.Common.Minecraft
+@using Phantom.Server.Minecraft
 @using Phantom.Server.Services.Agents
 @using Phantom.Server.Services.Audit
 @using Phantom.Server.Services.Instances
@@ -324,8 +325,7 @@
       form.MinecraftServerKind,
       form.MemoryAllocation ?? RamAllocationUnits.Zero,
       form.JavaRuntimeGuid.GetValueOrDefault(),
-      JvmArgumentsHelper.Split(form.JvmArguments),
-      EditedInstanceConfiguration?.LaunchAutomatically ?? false
+      JvmArgumentsHelper.Split(form.JvmArguments)
     );
 
     var result = await InstanceManager.AddOrEditInstance(instance);

Server/Phantom.Server/Phantom.Server.csproj

@@ -14,10 +14,10 @@
   <ItemGroup>
     <ProjectReference Include="..\..\Common\Phantom.Common.Data\Phantom.Common.Data.csproj" />
     <ProjectReference Include="..\..\Common\Phantom.Common.Logging\Phantom.Common.Logging.csproj" />
-    <ProjectReference Include="..\..\Common\Phantom.Common.Minecraft\Phantom.Common.Minecraft.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.IO\Phantom.Utils.IO.csproj" />
     <ProjectReference Include="..\..\Utils\Phantom.Utils.Runtime\Phantom.Utils.Runtime.csproj" />
     <ProjectReference Include="..\Phantom.Server.Database.Postgres\Phantom.Server.Database.Postgres.csproj" />
+    <ProjectReference Include="..\Phantom.Server.Minecraft\Phantom.Server.Minecraft.csproj" />
     <ProjectReference Include="..\Phantom.Server.Rpc\Phantom.Server.Rpc.csproj" />
     <ProjectReference Include="..\Phantom.Server.Services\Phantom.Server.Services.csproj" />
     <ProjectReference Include="..\Phantom.Server.Web\Phantom.Server.Web.csproj" />

Server/Phantom.Server/WebConfigurator.cs

@@ -1,6 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 using Phantom.Common.Data.Agent;
-using Phantom.Common.Minecraft;
+using Phantom.Server.Minecraft;
 using Phantom.Server.Services;
 using Phantom.Server.Services.Agents;
 using Phantom.Server.Services.Audit;

Utils/Phantom.Utils.Runtime/OneShotProcess.cs

@@ -0,0 +1,69 @@
+using System.Diagnostics;
+using Serilog;
+
+namespace Phantom.Utils.Runtime;
+
+public sealed class OneShotProcess {
+	private readonly ILogger logger;
+	private readonly ProcessStartInfo startInfo;
+	
+	public event DataReceivedEventHandler? Output;
+	
+	public OneShotProcess(ILogger logger, ProcessStartInfo startInfo) {
+		this.logger = logger;
+		this.startInfo = startInfo;
+		this.startInfo.RedirectStandardOutput = true;
+		this.startInfo.RedirectStandardError = true;
+	}
+
+	public async Task<bool> Run(CancellationToken cancellationToken) {
+		using var process = new Process { StartInfo = startInfo };
+		process.OutputDataReceived += Output;
+		process.ErrorDataReceived += Output;
+
+		try {
+			process.Start();
+			process.BeginOutputReadLine();
+			process.BeginErrorReadLine();
+		} catch (Exception e) {
+			logger.Error(e, "Caught exception launching process.");
+			return false;
+		}
+
+		try {
+			await process.WaitForExitAsync(cancellationToken);
+		} catch (OperationCanceledException) {
+			await TryKillProcess(process);
+			return false;
+		} catch (Exception e) {
+			logger.Error(e, "Caught exception waiting for process to exit.");
+			return false;
+		}
+
+		if (!process.HasExited) {
+			await TryKillProcess(process);
+			return false;
+		}
+
+		if (process.ExitCode != 0) {
+			logger.Error("Process exited with code {ExitCode}.", process.ExitCode);
+			return false;
+		}
+
+		logger.Verbose("Process finished successfully.");
+		return true;
+	}
+
+	private async Task TryKillProcess(Process process) {
+		using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(2));
+
+		try {
+			process.Kill();
+			await process.WaitForExitAsync(timeout.Token);
+		} catch (OperationCanceledException) {
+			logger.Error("Timed out waiting for killed process to exit.");
+		} catch (Exception e) {
+			logger.Error(e, "Caught exception killing process.");
+		}
+	}
+}