Add charset configuration after MySQL is installed

5.5/Dockerfile

@@ -3,7 +3,6 @@ MAINTAINER Fernando Mayo <[email protected]>, Feng Honglin <[email protected]>
 
 # Add MySQL configuration
 ADD my.cnf /etc/mysql/conf.d/my.cnf
-ADD mysqld_charset.cnf /etc/mysql/conf.d/mysqld_charset.cnf
 
 RUN apt-get update && \
     apt-get -yq install mysql-server-5.5 pwgen && \
@@ -13,6 +12,9 @@ RUN apt-get update && \
     mysql_install_db > /dev/null 2>&1 && \
     touch /var/lib/mysql/.EMPTY_DB
 
+# Add MySQL charset configuration
+ADD mysqld_charset.cnf /etc/mysql/conf.d/mysqld_charset.cnf
+
 # Add MySQL scripts
 ADD import_sql.sh /import_sql.sh
 ADD run.sh /run.sh

5.6/Dockerfile

@@ -3,7 +3,6 @@ MAINTAINER Fernando Mayo <[email protected]>, Feng Honglin <[email protected]>
 
 # Add MySQL configuration
 ADD my.cnf /etc/mysql/conf.d/my.cnf
-ADD mysqld_charset.cnf /etc/mysql/conf.d/mysqld_charset.cnf
 
 RUN apt-get update && \
     apt-get -yq install mysql-server-5.6 pwgen && \
@@ -13,6 +12,9 @@ RUN apt-get update && \
     mysql_install_db > /dev/null 2>&1 && \
     touch /var/lib/mysql/.EMPTY_DB
 
+# Add MySQL charset configuration
+ADD mysqld_charset.cnf /etc/mysql/conf.d/mysqld_charset.cnf
+
 # Add MySQL scripts
 ADD import_sql.sh /import_sql.sh
 ADD run.sh /run.sh

README.md

@@ -158,13 +158,31 @@ Examples:
 
 Now you can access port `3306` and `3307` for the master/slave MySQL.
 
+
+Character set and collation
+---------------------------
+To change MySQL character set and collation, please set environment variable `MYSQL_CHARACTER_SET` and `MYSQL_COLLATION` to any supported value by MySQL server. By default, `utf8mb4` and `utf8mb4_unicode_ci` are used in order to support 4-bytes unicode character (including emoji, astral symbol, etc.).
+
+To ensure to use `utf8mb4` and `utf8mb4_general_ci`:
+
+        docker run -d -e MYSQL_CHARACTER_SET=utf8mb4 -e MYSQL_COLLATION=utf8mb4_general_ci -p 3306:3306 --name mysql tutum/mysql
+
+To use `utf8` and `utf8_general_ci`:
+
+        docker run -d -e MYSQL_CHARACTER_SET=utf8 -e MYSQL_COLLATION=utf8_general_ci -p 3306:3306 --name mysql tutum/mysql
+
+
 Environment variables
 ---------------------
 
-`MYSQL_USER`: Set a specific username for the admin account (default 'admin').
+`MYSQL_USER`: Set a specific username for the admin account (default `admin`).
 
 `MYSQL_PASS`: Set a specific password for the admin account.
 
+`MYSQL_CHARACTER_SET`: Set a specific character encoding set (default `utf8mb4`)
+
+`MYSQL_COLLATION`: Set a specific collation (default `utf8mb4_unicode_ci`)
+
 `STARTUP_SQL`: Defines one or more SQL scripts separated by spaces to initialize the database. Note that the scripts must be inside the container, so you may need to mount them.
 
 Compatibility Issues