当我的flask应用程序尝试远程连接到名为ceres的服务器时，出现错误消息
OperationalError: (2003, "Can't connect to MySQL server on 'ceres.local' (65)")
所以我检查了下面显示的my.cnf文件
ciasto@ceres:/etc/mysql $ cat my.cnf
# The MariaDB configuration file
#
# The MariaDB/MySQL tools read configuration files in the following order:
# 1. "/etc/mysql/mariadb.cnf" (this file) to set global defaults,
# 2. "/etc/mysql/conf.d/*.cnf" to set global options.
# 3. "/etc/mysql/mariadb.conf.d/*.cnf" to set MariaDB-only options.
# 4. "~/.my.cnf" to set user-specific options.
#
# If the same option is defined multiple times, the last one will apply.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# This group is read both both by the client and the server
# use it for options that affect everything
#
[client-server]
# Import all .cnf files from configuration directory
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mariadb.conf.d/
[mysqld]
#skip-networking
#bind-address = <some ip-address>
# Fine Tuning
max_allowed_packet = 128M
wait_timeout = 28800
interactive_timeout = 28800
bind-address已注释，我认为它是打开的，可以接受所有远程连接，但是我的应用仍然无法连接到在远程计算机上运行mysql的mariadb。
在应用程序运行之间间隔了一天的时间之后，我总是会收到错误MySQL server has gone away.