質問編集履歴
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回答者からの回答による確認結果追記
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＜追記＞
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t_obaraさんよりいただいたURLの結果を追加しました。
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### 発生している問題・エラーメッセージ
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@@ -141,3 +147,163 @@
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f2e1877a8d62 bbs_db "docker-entrypoint.s…" 11 seconds ago Up 8 seconds 33060/tcp, 0.0.0.0:3309->3306/tcp bbs_mysql
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```
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＜追記＞
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**1. 外部サーバーへpingコマンドを叩く**
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```
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>ping 127.0.0.1
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127.0.0.1 に ping を送信しています 32 バイトのデータ:
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127.0.0.1 からの応答: バイト数 =32 時間 <1ms TTL=128
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127.0.0.1 からの応答: バイト数 =32 時間 <1ms TTL=128
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127.0.0.1 からの応答: バイト数 =32 時間 <1ms TTL=128
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127.0.0.1 からの応答: バイト数 =32 時間 <1ms TTL=128
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127.0.0.1 の ping 統計:
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パケット数: 送信 = 4、受信 = 4、損失 = 0 (0% の損失)、
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ラウンド トリップの概算時間 (ミリ秒):
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最小 = 0ms、最大 = 0ms、平均 = 0ms
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```
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⇒返答あり
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**2. 外部サーバーに直接ログインし、サーバー上でMySQLにアクセス**
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```
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mysql> show variables like 'port';
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+---------------+-------+
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| Variable_name | Value |
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+---------------+-------+
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| port | 3306 |
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+---------------+-------+
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1 row in set (0.01 sec)
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mysql> select host, user from mysql.user;
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+-----------+------------------+
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| host | user |
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+-----------+------------------+
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| % | root |
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| % | user |
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| localhost | mysql.infoschema |
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| localhost | mysql.session |
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| localhost | mysql.sys |
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| localhost | root |
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+-----------+------------------+
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6 rows in set (0.00 sec)
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```
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⇒portが3306なのは、コンテナ内なので問題なしのはず。。
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ユーザーも、root@%がいるためアクセス可能のはず。。
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**3. /etc/mysql/my.cnfの確認**
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```
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root@f2e1877a8d62:/etc/mysql# cat my.cnf
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# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# The MySQL Server configuration file.
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#
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# For explanations see
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# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
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[mysqld]
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pid-file = /var/run/mysqld/mysqld.pid
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socket = /var/run/mysqld/mysqld.sock
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datadir = /var/lib/mysql
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secure-file-priv= NULL
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# Disabling symbolic-links is recommended to prevent assorted security risks
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symbolic-links=0
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# Custom config should go here
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!includedir /etc/mysql/conf.d/
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```
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⇒bind-addressの記載なし。自分で作成したmy.cnfにも記載していない状態。
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