add error print info for mysql (#359)

* update component check

* update component check

* update component check

* update component check

* update component check

* update component check

* update component check

* update component check

* update mysql check

pkg/common/dbconn/gorm.go

@@ -29,42 +29,59 @@ import (
 )
 
 func NewMysqlGormDB() (*gorm.DB, error) {
+	// Construct the DSN (Data Source Name)
 	dsn := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=Local",
 		*config.Config.Mysql.Username, *config.Config.Mysql.Password, (*config.Config.Mysql.Address)[0], "mysql")
+
+	// First attempt to open a new database connection
 	db, err := gorm.Open(mysql.Open(dsn), nil)
 	if err != nil {
 		time.Sleep(time.Duration(30) * time.Second)
 		db, err = gorm.Open(mysql.Open(dsn), nil)
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("failed to open initial database connection with DSN %s: %w", dsn, err)
 		}
+
 	}
+
 	sqlDB, err := db.DB()
 	if err != nil {
-		return nil, err
+		// Include specific function name and the DSN used
+		return nil, fmt.Errorf("failed to get underlying sql.DB from GORM with DSN %s: %w", dsn, err)
 	}
 	defer sqlDB.Close()
 	sql := fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s default charset utf8mb4 COLLATE utf8mb4_unicode_ci;", *config.Config.Mysql.Database)
 	err = db.Exec(sql).Error
 	if err != nil {
 		return nil, fmt.Errorf("init db %w", err)
 	}
+	// Reconnect with the specific database
 	dsn = fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=Local",
 		*config.Config.Mysql.Username, *config.Config.Mysql.Password, (*config.Config.Mysql.Address)[0], *config.Config.Mysql.Database)
+
+	// Custom logger
 	sqlLogger := log.NewSqlLogger(logger.LogLevel(*config.Config.Mysql.LogLevel), true, time.Duration(*config.Config.Mysql.SlowThreshold)*time.Millisecond)
+
+	// Second attempt to open a new database connection
 	db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
 		Logger: sqlLogger,
 	})
 	if err != nil {
-		return nil, err
+		// Include specific function name and the DSN used
+		return nil, fmt.Errorf("failed to open database connection with specific database using DSN %s: %w", dsn, err)
 	}
+
 	sqlDB, err = db.DB()
 	if err != nil {
-		return nil, err
+		// Include specific function name and the DSN used
+		return nil, fmt.Errorf("failed to get underlying sql.DB from GORM with specific database using DSN %s: %w", dsn, err)
 	}
+
+	// Database connection configuration
 	sqlDB.SetConnMaxLifetime(time.Second * time.Duration(*config.Config.Mysql.MaxLifeTime))
 	sqlDB.SetMaxOpenConns(*config.Config.Mysql.MaxOpenConn)
 	sqlDB.SetMaxIdleConns(*config.Config.Mysql.MaxIdleConn)
+
 	return db, nil
 }