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internal/database/mysql.go

@@ -0,0 +1,46 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+	"github.com/go-sql-driver/mysql"
+	"github.com/luxsin/app-api/internal/config"
+)
+
+func Open(cfg config.DatabaseConfig) (*sql.DB, error) {
+	mc := mysql.Config{
+		User:   cfg.User,
+		Passwd: cfg.Password,
+		Net:    "tcp",
+		Addr:   fmt.Sprintf("%s:%d", cfg.Host, cfg.Port),
+		DBName: cfg.Name,
+		Params: map[string]string{
+			"charset":   "utf8mb4",
+			"parseTime": "True",
+			"loc":       "Local",
+		},
+	}
+
+	db, err := sql.Open("mysql", mc.FormatDSN())
+	if err != nil {
+		return nil, fmt.Errorf("open mysql: %w", err)
+	}
+
+	db.SetMaxOpenConns(25)
+	db.SetMaxIdleConns(5)
+	db.SetConnMaxLifetime(5 * time.Minute)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := db.PingContext(ctx); err != nil {
+		_ = db.Close()
+		return nil, fmt.Errorf("ping mysql: %w", err)
+	}
+
+	return db, nil
+}