Initial commit

cpone-dashboard/db/db.go

@@ -0,0 +1,33 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var DB *sql.DB
+
+func Connect(dsn string) error {
+	if dsn == "" {
+		return fmt.Errorf("DB_DSN is not set")
+	}
+
+	conn, err := sql.Open("mysql", dsn)
+	if err != nil {
+		return fmt.Errorf("open db: %w", err)
+	}
+
+	if err := conn.Ping(); err != nil {
+		return fmt.Errorf("ping db: %w", err)
+	}
+
+	conn.SetMaxOpenConns(25)
+	conn.SetMaxIdleConns(10)
+
+	DB = conn
+	log.Println("database connected: cpone_dashboard")
+	return nil
+}