其他人都是不正確的

使用mysql容器映象可以很快速的執行mysql，免去了傳統的虛擬機器安裝方式的繁瑣配置。但是使用官方的mysql映象，你會遇到中文亂碼的問題，原因是官方映象的字符集預設值不是utf8。這時候你去google，會找到一些文章，如這個哥們的，但是你按照他的做法，還是會亂碼，這時候你進入mysql檢視字符集，發現是這樣的：

show variables like "%character%";

+--------------------------+----------------------------------+
| Variable_name            | Value                            |
+--------------------------+----------------------------------+
| character_set_client     | utf8                             |
| character_set_connection | utf8                             |
| character_set_database   | latin1                           |
| character_set_filesystem | binary                           |
| character_set_results    | utf8                             |
| character_set_server     | latin1                           |
| character_set_system     | utf8                             |
| character_sets_dir       | /usr/local/mysqlarsets/ |
+--------------------------+----------------------------------+
8 rows in set (0.00 sec)
 

這裡才是正確的

好吧，我費了不少力氣，才找到正確方法。

首先檢視官方映象說明，有關於utf8設定的引數：

Many configuration options can be passed as flags to mysqld. This will give you the flexibility to customize the container without needing a cnf file. For example, if you want to change the default encoding and collation for all tables to use UTF-8 (utf8mb4) just run the following:
    $ docker run --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:tag --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
 

如果只是設定這兩個引數是不夠的，你會得到這樣的配置：

mysql> show variables like "%character%";
+--------------------------+----------------------------------+
| Variable_name            | Value                            |
+--------------------------+----------------------------------+
| character_set_client     | latin1                           |
| character_set_connection | latin1                           |
| character_set_database   | utf8                             |
| character_set_filesystem | binary                           |
| character_set_results    | latin1                           |
| character_set_server     | utf8                             |
| character_set_system     | utf8                             |
| character_sets_dir       | /usr/local/mysql/share/charsets/ |
+--------------------------+----------------------------------+
8 rows in set (0.00 sec)
 

你會發現上面那個哥們的與官方的這個指導取並集，就是正確的結果了，所以方法就很簡單了。檢視dockerfile。正確的配置：

mysql> show variables like "%character%";
+--------------------------+----------------------------------+
| Variable_name            | Value                            |
+--------------------------+----------------------------------+
| character_set_client     | utf8                             |
| character_set_connection | utf8                             |
| character_set_database   | utf8                             |
| character_set_filesystem | binary                           |
| character_set_results    | utf8                             |
| character_set_server     | utf8                             |
| character_set_system     | utf8                             |
| character_sets_dir       | /usr/local/mysql/share/charsets/ |
+--------------------------+----------------------------------+
8 rows in set (0.01 sec)