The password for the root user, set every time the server starts. Defaults to a blank password, which is handy for development, but you should set this to something in production.
MYSQL_DATABASE
A database to automatically create if it doesn't exist. If not provided, does not create a database.
MYSQL_USER
A user to create that has access to the database specified by MYSQL_DATABASE.
MYSQL_PASSWORD
The password for MYSQL_USER. Defaults to a blank password.
BIND_ADDRESS
Default 0.0.0.0
LOG_BIN
If provided, will become the value of the log-bin config variable
SERVER_ID
Default = 1
INNODB_FORCE_RECOVERY
Default = 0
INNODB_FILE_FORMAT
Default = Barracuda
INNODB_FILE_FORMAT_MAX
Default = Barracuda
INNODB_FILE_PER_TABLE
Default = 1
MAX_ALLOWED_PACKET
Default = 134217728
MAX_CONNECTIONS
Default = 251
SYNC_BINLOG
Default = 4
CONF_*
Any environment variables in the format CONF_varname=value will be put in my.cnf as varname=value
MYSQLD_ARGS
Extra parameters to pass to the mysqld process on startup