mysql5.6升级到5.7的注意事项
mysql5.6 升级至 mysql5.7环境介绍：
旧库：
basedir=/usr/local/mysql-5.6
datadir=/home/mysql
config=/home/mysql/my.cnf
sock=/home/mysql/mysql.sock
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
character_set_server = utf8
lower_case_table_names=1
skip-host-cache
skip-name-resolve
federated
log-error=/home/mysql/log/mysqld.log
pid-file=/home/mysql/master.example.com.pid
default-character-set = utf8
socket=/home/mysql/mysql.sock
升级步骤：
1、对mysql5.6进行全库备份（******）用于失败倒回
2、关闭mysql5.6版本数据库
3、将mysql5.7软件部署
4、修改配置信息
5、修改启动脚本
6、启动mysql5.7数据库
7、mysql_upgrade升级数据库相关参数
8、重启数据库，测试升级结果
1、全库备份
mysqldump -uroot -p123456 --all-databases > /root/mysql_all.sql
2、 关闭数据库
/usr/local/mysql-5.6/bin/mysqladmin -uroot -p123456 shutdown
验证
netstat -tnpl|grep :3306
3、 部署mysql5.7
tar xf mysql-5.7.22-el7-x86_64.tar.gz -C /usr/local
cd /usr/local
mv mysql-5.7.22 mysql5.7
4、修改配置信息
vim /home/mysql/my.cnf
basedir=/usr/local/mysql5.7 ---修改
5、修改启动脚本
cp /usr/local/mysql5.7/support-files/mysql.server /etc/init.d/mysql5.7
vim /etc/init.d/mysql5.7
basedir=/usr/local/mysql5.7
datadir=/home/mysql
6、启动mysql5.7
service mysql5.7 start
# netstat -tnpl |grep :3306
tcp6 0 0 :::3306 :::* LISTEN 8820/mysqld
# mysql -uroot -p123456
mysql: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.22 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
7、mysql_upgrade升级数据库相关参数
mysql_upgrade -uroot -p123456
mysql> select user,host, authentication_string from mysql.user;
+---------------+--------------------+-------------------------------------------+
| user | host | authentication_string |
+---------------+--------------------+-------------------------------------------+
| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root | master.example.com | |
| root | 127.0.0.1 | |
测试升级成功
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