allow on docker

build/Dockerfile

@@ -69,6 +69,7 @@ EXPOSE 5000
 
 ENV General__ValidInstancePaths__0 /tgs_instances
 ENV FileLogging__Directory /tgs_logs
+ENV Internal__UsingDocker true
 
 WORKDIR /app
 

src/Tgstation.Server.Host/Components/InstanceManager.cs

@@ -130,6 +130,11 @@ namespace Tgstation.Server.Host.Components
 		/// </summary>
 		readonly SwarmConfiguration swarmConfiguration;
 
+		/// <summary>
+		/// The <see cref="InternalConfiguration"/> for the <see cref="InstanceManager"/>.
+		/// </summary>
+		readonly InternalConfiguration internalConfiguration;
+
 		/// <summary>
 		/// The <see cref="TaskCompletionSource"/> for <see cref="Ready"/>.
 		/// </summary>
@@ -177,6 +182,7 @@ namespace Tgstation.Server.Host.Components
 		/// <param name="platformIdentifier">The value of <see cref="platformIdentifier"/>.</param>
 		/// <param name="generalConfigurationOptions">The <see cref="IOptions{TOptions}"/> containing the value of <see cref="generalConfiguration"/>.</param>
 		/// <param name="swarmConfigurationOptions">The <see cref="IOptions{TOptions}"/> containing the value of <see cref="swarmConfiguration"/>.</param>
+		/// <param name="internalConfigurationOptions">The <see cref="IOptions{TOptions}"/> containing the value of <see cref="internalConfiguration"/>.</param>
 		/// <param name="logger">The value of <see cref="logger"/>.</param>
 		public InstanceManager(
 			IInstanceFactory instanceFactory,
@@ -193,6 +199,7 @@ namespace Tgstation.Server.Host.Components
 			IPlatformIdentifier platformIdentifier,
 			IOptions<GeneralConfiguration> generalConfigurationOptions,
 			IOptions<SwarmConfiguration> swarmConfigurationOptions,
+			IOptions<InternalConfiguration> internalConfigurationOptions,
 			ILogger<InstanceManager> logger)
 		{
 			this.instanceFactory = instanceFactory ?? throw new ArgumentNullException(nameof(instanceFactory));
@@ -209,6 +216,7 @@ namespace Tgstation.Server.Host.Components
 			this.platformIdentifier = platformIdentifier ?? throw new ArgumentNullException(nameof(platformIdentifier));
 			generalConfiguration = generalConfigurationOptions?.Value ?? throw new ArgumentNullException(nameof(generalConfigurationOptions));
 			swarmConfiguration = swarmConfigurationOptions?.Value ?? throw new ArgumentNullException(nameof(swarmConfigurationOptions));
+			internalConfiguration = internalConfigurationOptions?.Value ?? throw new ArgumentNullException(nameof(internalConfigurationOptions));
 			this.logger = logger ?? throw new ArgumentNullException(nameof(logger));
 
 			originalConsoleTitle = console.Title;
@@ -676,7 +684,7 @@ namespace Tgstation.Server.Host.Components
 				if (!systemIdentity.CanCreateSymlinks)
 					throw new InvalidOperationException($"The user running {Constants.CanonicalPackageName} cannot create symlinks! Please try running as an administrative user!");
 
-				if (!platformIdentifier.IsWindows && systemIdentity.IsSuperUser)
+				if (!platformIdentifier.IsWindows && systemIdentity.IsSuperUser && !internalConfiguration.UsingDocker)
 				{
 					logger.LogWarning("TGS is being run as the root account. This is not recommended and may prevent launch in a future version.");
 				}

src/Tgstation.Server.Host/Configuration/InternalConfiguration.cs

@@ -1,4 +1,6 @@
-namespace Tgstation.Server.Host.Configuration
+using System;
+
+namespace Tgstation.Server.Host.Configuration
 {
 	/// <summary>
 	/// Unstable configuration options used internally by TGS.
@@ -25,6 +27,11 @@
 		/// </summary>
 		public bool UsingSystemD { get; set; }
 
+		/// <summary>
+		/// If the server is running inside of a Docker container.
+		/// </summary>
+		public bool UsingDocker => Environment.GetEnvironmentVariable("Internal__UsingDocker")?.Equals("true", StringComparison.OrdinalIgnoreCase) ?? false;
+
 		/// <summary>
 		/// The base path for the app settings configuration files.
 		/// </summary>