Add compatibility layer for Docker and Gunicorn deployments

- Auto-detect mysqldump vs mariadb-dump command
- Conditional SSL flag based on Docker environment detection
- Works in both Docker containers and standard systemd deployments
- No breaking changes to existing functionality

py_app/app/database_backup.py

@@ -23,6 +23,35 @@ class DatabaseBackupManager:
         self.config = self._load_database_config()
         self.backup_path = self._get_backup_path()
         self._ensure_backup_directory()
+        self.dump_command = self._detect_dump_command()
+    
+    def _detect_dump_command(self):
+        """Detect which mysqldump command is available (mariadb-dump or mysqldump)"""
+        try:
+            # Try mariadb-dump first (newer MariaDB versions)
+            result = subprocess.run(['which', 'mariadb-dump'], 
+                                  capture_output=True, text=True)
+            if result.returncode == 0:
+                return 'mariadb-dump'
+            
+            # Fall back to mysqldump
+            result = subprocess.run(['which', 'mysqldump'], 
+                                  capture_output=True, text=True)
+            if result.returncode == 0:
+                return 'mysqldump'
+            
+            # Default to mariadb-dump (will error if not available)
+            return 'mariadb-dump'
+        except Exception as e:
+            print(f"Warning: Could not detect dump command: {e}")
+            return 'mysqldump'  # Default fallback
+    
+    def _get_ssl_args(self):
+        """Get SSL arguments based on environment (Docker needs --skip-ssl)"""
+        # Check if running in Docker container
+        if os.path.exists('/.dockerenv') or os.environ.get('DOCKER_CONTAINER'):
+            return ['--skip-ssl']
+        return []
     
     def _load_database_config(self):
         """Load database configuration from external_server.conf"""
@@ -104,12 +133,18 @@ class DatabaseBackupManager:
             # Build mysqldump command
             # Note: --skip-lock-tables and --force help with views that have permission issues
             cmd = [
-                'mariadb-dump',
+                self.dump_command,
                 f"--host={self.config['host']}",
                 f"--port={self.config['port']}",
                 f"--user={self.config['user']}",
                 f"--password={self.config['password']}",
-                '--skip-ssl',
+            ]
+            
+            # Add SSL args if needed (Docker environment)
+            cmd.extend(self._get_ssl_args())
+            
+            # Add backup options
+            cmd.extend([
                 '--single-transaction',
                 '--skip-lock-tables',
                 '--force',
@@ -119,7 +154,7 @@ class DatabaseBackupManager:
                 '--add-drop-database',
                 '--databases',
                 self.config['database']
-            ]
+            ])
             
             # Execute mysqldump and save to file
             with open(backup_file, 'w') as f:
@@ -316,11 +351,18 @@ class DatabaseBackupManager:
             # --complete-insert: Include column names in INSERT (more reliable)
             # --extended-insert: Use multi-row INSERT for efficiency
             cmd = [
-                'mariadb-dump',
+                self.dump_command,
                 f"--host={self.config['host']}",
                 f"--port={self.config['port']}",
                 f"--user={self.config['user']}",
                 f"--password={self.config['password']}",
+            ]
+            
+            # Add SSL args if needed (Docker environment)
+            cmd.extend(self._get_ssl_args())
+            
+            # Add data-only backup options
+            cmd.extend([
                 '--no-create-info',  # Skip table structure
                 '--skip-triggers',    # Skip triggers
                 '--no-create-db',     # Skip database creation
@@ -329,7 +371,7 @@ class DatabaseBackupManager:
                 '--single-transaction',
                 '--skip-lock-tables',
                 self.config['database']
-            ]
+            ])
             
             # Execute mysqldump and save to file
             with open(backup_file, 'w') as f: