MySQL 5.7.18升级到5.7.22教程--离线升级MySQL数据库
本文以MySQL 5.7.18升级到5.7.22为例。
环境：Linux、MySQL
主要步骤：
1、把数据库权限导出
2、导出整个库
3、备份原数据库
4、安装新数据库版本
5、恢复权限及整个库
1、把数据库权限导出
将pt-show-grants文件放到/data/mysql_data目录下，进到/data/mysql_data目录，运行命令
$ perl pt-
show
-grants --
user
=root --ask-pass --flush > /data/mysql_data/grants.
sql
即可生成权限SQL文件
此处有可能报错
Enter password: Cannot read response; is Term::ReadKey installed? Can't locate Term/ReadKey.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at pt-show-grants line 904.
原因是缺少
Term/ReadKey.pm模块，安装一下
[root@localhost mysql_update]# rpm -ivh perl-TermReadKey-2.30-13.el6.x86_64.rpm
warning: perl-TermReadKey-2.30-13.el6.x86_64.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
1:perl-TermReadKey ########################################### [100%]
2、导出整个库
以下命令是生成要备份的库列表，除mysql、performance_schema、information_schema这几个库MySQL安装时会自带的外
$ mysql
-uroot -p123456
-BNe
"SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME NOT IN ('mysql', 'performance_schema', 'information_schema')"
|
tr
'n'
' '
>
/data/mysql_data/dbs-to-dump
.
sql
然后对整个库进行备份
$ mysqldump
-uroot -p123456
--
routines
--
events
--
single-transaction
--
databases $(cat /data/mysql_data/dbs-to-dump
.
sql)
>
/data/mysql_data/
full
-data-dump
.
sql
此处有可能报错
mysqldump: [ERROR] unknown option '--no-beep'
vim /etc/my.cnf
注释掉 [client]下的
no-beep
参数;
重启一下mysql
service mysqld restart
3、备份原数据库
关闭数据库
service mysqld stop
迁移数据库到新目录
mv
/data
/mysql/
/data
/mysql-
5.7.18
4、安装新数据库版本
解压mysql-5.7.22
tar -xzvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
mysql-5.7.22下载链接
http://mirrors.sohu.com/mysql/MySQL-5.7/
重命名
mv mysql-5.7.22-linux-glibc2.12-x86_64/ /data/mqsql/
#安装
cd mysql/
mkdir data
更改所有者
cd ../
chown -R mysql:mysql /data/mysql
#授权755
chmod -R 755 /data/mysql
cd mysql
./bin/mysqld --user=mysql --basedir=/data/mysql --datadir=/data/mysql/data --initialize
#注意最下面的密码，待会启动MySQL的时候要用到
2018-06-21T08:10:59.876393Z 0 [Warning] 'NO_AUTO_CREATE_USER' sql mode was not set.
100
100
2018-06-21T08:11:01.111546Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-06-21T08:11:01.336463Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-06-21T08:11:01.412039Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: a2bc3741-752a-11e8-9371-886639ceda0a.
2018-06-21T08:11:01.426528Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2018-06-21T08:11:01.427977Z 1 [Note] A temporary password is generated for root@localhost: # s2uvXcyVqmy
2018-06-21T08:11:08.592289Z 1 [Warning] 'user' entry 'root@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598055Z 1 [Warning] 'user' entry 'mysql.session@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598067Z 1 [Warning] 'user' entry 'mysql.sys@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598084Z 1 [Warning] 'db' entry 'performance_schema mysql.session@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598090Z 1 [Warning] 'db' entry 'sys mysql.sys@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598100Z 1 [Warning] 'proxies_priv' entry '@ root@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598134Z 1 [Warning] 'tables_priv' entry 'user mysql.session@localhost' ignored in --skip-name-resolve mode.
2018-06-21T08:11:08.598143Z 1 [Warning] 'tables_priv' entry 'sys_config mysql.sys@localhost' ignored in --skip-name-resolve mode.
#先简单测试一下
执行 ./support-files/mysql.server start
如果提示下面错误
./support-files/mysql.server: line 239: my_print_defaults: command not found
./support-files/mysql.server: line 259: cd: /usr/local/mysql: No such file or directory
Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_safe)
那就正常了，哈哈
1.cp support-files/mysql.server /etc/init.d/mysqld
2.chmod 755 /etc/init.d/mysqld
3.vi /etc/init.d/mysqld
将66-73行/usr/local/修改为/data/
修改前
then
basedir=/usr/local/mysql
bindir=/usr/local/mysql/bin
if test -z "$datadir"
then
datadir=/usr/local/mysql/data
fi
sbindir=/usr/local/mysql/bin
libexecdir=/usr/local/mysql/bin
else
修改后，根据你的实际目录修改
then
basedir=/data/mysql
bindir=/data/mysql/bin
if test -z "$datadir"
then
datadir=/data/mysql/data
fi
sbindir=/data/mysql/bin
libexecdir=/data/mysql/bin
else
service mysqld start
如果提示Starting MySQL.Logging to '/data/mysql/data/MyServer.err'.
不管它就行，以后重启就不会提示了
接下来来配置my.cnf
如果按照下面配置好配置文件还不行，
记得kill进程
ps -ef|grep mysql
kill -9 pid
先清理一下内存
sync
echo 3 > /proc/sys/vm/drop_caches
启动MySQL
/etc/init.d/mysqld start
使用刚刚安装的初始密码进行登录
mysql -uroot -p'
s2uvXcyVqmy'
更改密码
MySQL [mysql]> update user set password_expired='N' where user='root';
MySQL [mysql]> SET PASSWORD = PASSWORD('123456');
MySQL [mysql]> flush privileges;
MySQL [mysql]> quit
启动MySQL有可能报错
报错：The server quit without updating PID file (/[FAILED]ql/mysqld.pid).
原因没权限启动进程，有些目录属root
chown -R mysql:mysql /data/mysql
5、恢复权限及整个库
1）用户信息导入到新数据库中.
mysql -uroot <
/data/mysql_data/grants
.sql
2）导出的数据导入到新数据库.
$ mysql -e
"SET GLOBAL max_allowed_packet=1024*1024*1024"
;
$
mysql -uroot -p
--
max
-allowed-packet
=
1
G
<
/data/mysql_data/
full
-data-dump
.
sql
如果中途遇到什么错就百度一下处理吧。
告诉你一个捷径：
更暴力的升级方式是将/data/mysql-5.7.22/bin目录下所有文件替换原/data/mysql-5.7.18/bin目录下所有文件，可以尝试一下。
本人试过/data/mysql-5.7.18/data可以做迁移到/data/mysql-5.7.22。
但是还是建议按本文步骤来做稳妥一些。
相关文件下载
https://download.csdn.net/download/qq_41018670/10491169
参考：
https://blog.csdn.net/sunofsummer/article/details/51777920
https://blog.csdn.net/guoxingege/article/details/70574043