diff --git a/SQLBackupToCOS/BackupService.cs b/SQLBackupToCOS/BackupService.cs
index 968753f..550a07b 100644
--- a/SQLBackupToCOS/BackupService.cs
+++ b/SQLBackupToCOS/BackupService.cs
@@ -42,7 +42,19 @@ public class BackupService(ILogger<BackupService> logger, IConfiguration config,
         var url = _config.GetValue<string>("Database:Host") ?? "172.17.0.1";
         var user = _config.GetValue<string>("Database:User") ?? "backupUser";
         var password = _config.GetValue<string>("Database:Password") ?? "";
-        var databases = _config.GetSection("Database:Databases").Get<string[]>() ?? ["my_database"];
+        
+        // 支持两种格式：
+        // 1. 数组格式（appsettings.json）: ["db1", "db2"]
+        // 2. 逗号分隔格式（环境变量）: "db1,db2"
+        var databases = _config.GetSection("Database:Databases").Get<string[]>();
+        if (databases == null || databases.Length == 0)
+        {
+            // 尝试读取逗号分隔的字符串
+            var databasesStr = _config.GetValue<string>("Database:Databases");
+            databases = string.IsNullOrWhiteSpace(databasesStr) 
+                ? ["my_database"] 
+                : databasesStr.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+        }
 
         var timestamp = DateTime.Now.ToString("yyyyMMddHHmmss");
         var dumpDir = $"/data/dumps/dump-{timestamp}";
diff --git a/SQLBackupToCOS/Dockerfile b/SQLBackupToCOS/Dockerfile
index 7f7c50e..a6b9c81 100644
--- a/SQLBackupToCOS/Dockerfile
+++ b/SQLBackupToCOS/Dockerfile
@@ -28,6 +28,5 @@ RUN dotnet publish "./SQLBackupToCOS.csproj" -c $BUILD_CONFIGURATION -o /app/pub
 FROM base AS final
 WORKDIR /app
 ENV TZ="Asia/Shanghai"
-RUN apt update && apt install -y mysql-client && mkdir /data && chmod 777 /data
 COPY --from=publish /app/publish .
 ENTRYPOINT ["dotnet", "SQLBackupToCOS.dll"]
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 962d00f..3dc6abd 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,3 +4,13 @@ services:
     build:
       context: .
       dockerfile: SQLBackupToCOS/Dockerfile
+    environment:
+      Database__Host: SQLHOST
+      Database__User: SQLUSER
+      Database__Password: StrongPassword!
+      Database__Databases: DB1,DB2
+      COS__BucketName: BUCKETNAME
+      COS__Region: BUCKETREGION
+      COS__SecretId: SECRETID
+      COS__SecretKey: SECRETKEY
+      COS__FilePath: PATH