fix(MySql): Create an empty /var/lib/mysql-files directory to preve…

…nt older versions from failing to start (#1144)

Co-authored-by: Andre Hofmeister <[email protected]>

src/Testcontainers.MySql/MySqlBuilder.cs

@@ -90,7 +90,7 @@ protected override MySqlBuilder Init()
             .WithDatabase(DefaultDatabase)
             .WithUsername(DefaultUsername)
             .WithPassword(DefaultPassword)
-            .WithStartupCallback((container, ct) => container.WriteConfigurationFileAsync(ct));
+            .WithStartupCallback((container, ct) => Task.WhenAll(container.CreateMySqlFilesDirectoryAsync(ct), container.WriteConfigurationFileAsync(ct)));
     }
 
     /// <inheritdoc />

src/Testcontainers.MySql/MySqlContainer.cs

@@ -48,6 +48,20 @@ await CopyAsync(Encoding.Default.GetBytes(scriptContent), scriptFilePath, Unix.F
             .ConfigureAwait(false);
     }
 
+    /// <summary>
+    /// Creates an empty <c>/var/lib/mysql-files</c> directory.
+    /// </summary>
+    /// <remarks>
+    /// The directory does not exist in the MySql 8.0.28 and earlier Docker images, and
+    /// it is required for the module to start properly.
+    /// </remarks>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>Task that completes when the directory has been created.</returns>
+    internal Task CreateMySqlFilesDirectoryAsync(CancellationToken ct = default)
+    {
+        return ExecAsync(new[] { "mkdir", "/var/lib/mysql-files" }, ct);
+    }
+
     /// <summary>
     /// Write an unobfuscated MySql configuration file that configures the client
     /// login path. This prevents warnings in the <see cref="ExecScriptAsync" />

tests/Testcontainers.MySql.Tests/MySqlContainerTest.cs

@@ -66,4 +66,14 @@ public MySqlRootConfiguration()
         {
         }
     }
+
+    [UsedImplicitly]
+    public sealed class GitHubIssue1142 : MySqlContainerTest
+    {
+        // https://github.com/testcontainers/testcontainers-dotnet/issues/1142.
+        public GitHubIssue1142()
+            : base(new MySqlBuilder().WithImage("mysql:8.0.28").Build())
+        {
+        }
+    }
 }