docker 安装的mysql修改配置文件

一、先看一下容器绑定的配置文件目录在哪

 docker inspect 347

如图，mysql容器的配置文件映射在服务器  /opt/mysql_docker/conf目录下。所以想修改容器的配置文件内容，只需要修改 /opt/mysql_docker/conf中的配置文件。

 二、发现 /opt/mysql_docker/conf 目录下没有文件。

三、进入mysql容器，复制mysql的配置文件内容

docker exec -it 347 /bin/bash

cd /etc/mysql/conf.d

 cat mysqld.cnf 

复制内容如下：

# Copyright (c) 2014, 2021, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is also distributed with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation.  The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have included with MySQL.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

#
# The MySQL  Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
#log-error      = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address   = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTIONroot@347e69759ec4:/etc/mysql/conf.d#  cat mysqld.cnf 

四、在服务器/opt/mysql_docker/conf 下新建配置文件mysqld.cnf，内容来自第三步复制内容。

五、重启容器

docker start 347

发现报出异常如下：

Error response from daemon: driver failed programming external connectivity on endpoint mysqlserver (c97a49898a84bdfaadaa8510a81f99d3eb7b19fd3eb4451dba7f6d70f9516409):  (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 3306 -j DNAT --to-destination 172.18.0.5:3306 ! -i docker0: iptables: No chain/target/match by that name.
 (exit status 1))
Error: failed to start containers: 347

解决方法：重启docker,再启动mysql容器。

service docker restart