RDS MySQL 接続確認

• 接続先のインスタンスを識別する方法 (EC2 / RDS MySQL)
• https://qiita.com/hirooka622/items/d9ffb3aaf5fbba0a8a8d

mysql> show variables like "hostname";

+---------------+---------------+
| Variable_name | Value         |
+---------------+---------------+
| hostname      | ip-172-23-1-5 |
+---------------+---------------+
1 row in set (0.00 sec)