mysql基于软件包升级

注意：无论是什么升级都是有风险的，升级前都需要做一次全备份。

mysql简单备份和恢复-CSDN博客

本文章以5.7升级为8.0为案例演示。

0、准备

1、安装mysql5.7，5.7版本mysql安装演示mysql-linux归档版安装-CSDN博客

2、在官网下载8.0压缩包MySQL :: Download MySQL Community Server 

3、mysql8.0压缩包上传到服务器，并解压

xz -d /opt/mysql-8.0.35-linux-glibc2.28-x86_64.tar.xz

tar -xf /opt/mysql-8.0.35-linux-glibc2.28-x86_64.tar -C /opt/mysql/mysql8/

mv /opt/mysql/mysql8/mysql-8.0.35-linux-glibc2.28-x86_64 /opt/mysql/mysql8/mysql

 

 

1.就地升级

概述：关闭老版本mysql，使用老版本数据目录启动新版本数据库 。

1.关闭旧数据库

开启慢速关闭mysql，让一些缓存信息可以刷盘到磁盘中。 

SET GLOBAL innodb_fast_shutdown = 0;

 关闭mysql

/opt/mysql/mysql2/mysql/bin/mysqladmin -u root -P 3308 -S /tmp/mysql3.sock -p shutdown

2.启动新数据库 

 /opt/mysql/mysql8/mysql/bin/mysqld_safe --defaults-file=/etc/my3.cnf  --user=mysql3

 --defaults-file使用旧数据库配置文件

 --user使用旧数据库用户

 

3.客户端连接

/opt/mysql/mysql8/mysql/bin/mysql -u root -p -P 3308 -S /tmp/mysql3.sock 

查看mysql版本 ，8.0表示升级成功

mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.35    |
+-----------+
1 row in set (0.00 sec) 

 

2.逻辑升级

 概述：逻辑备份老版本数据库，关闭老版本数据库，启动新版本数据库，把老版本逻辑备份数据导入新版本数据库。

 

1.从以前的 MySQL 导出现有数据 ： 

/opt/mysql/mysql5.7.36/mysql/bin/mysqldump -u root -p -P3307 -S /opt/mysql/mysql5.7.36/mysql.sock --add-drop-table --routines --events --all-databases --force > /opt/mysql/mysql5.7.36/data-for-upgrade.sql 

 --add-drop-table：SQL语句添加-如果存在表删除表

 --routines：转储包括函数和过程

--events：转储包括事件

--all-databases：转储所有数据库

--force：转储中出现错误继续执行

 

2.关闭旧mysql数据库

/opt/mysql/mysql5.7.36/mysql/bin/mysqladmin -u root -p -P 3307 -S /opt/mysql/mysql5.7.36/mysql.sock shutdown

 3.安装mysql8.0 参考mysql-linux归档版安装-CSDN博客

初始化数据目录

[client]
#password	= your_password
port		= 3308
socket		= /tmp/mysql8.sock

[mysqld]
port		= 3308
socket		= /tmp/mysql8.sock
datadir = /opt/mysql/mysql8/data
basedir = /opt/mysql/mysql8/mysql
default_storage_engine = InnoDB
performance_schema_max_table_instances = 400
table_definition_cache = 400
skip-external-locking
key_buffer_size = 32M
max_allowed_packet = 100G
table_open_cache = 128
sort_buffer_size = 768K
net_buffer_length = 4K
read_buffer_size = 768K
read_rnd_buffer_size = 256K
myisam_sort_buffer_size = 8M
thread_cache_size = 16
tmp_table_size = 32M
default_authentication_plugin = mysql_native_password
lower_case_table_names = 1
sql-mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

explicit_defaults_for_timestamp = true
#skip-name-resolve
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535

log-bin=mysql-bin
binlog_format=mixed
server-id = 3
slow_query_log=1
slow-query-log-file=/opt/mysql/mysql8/data/mysql-slow.log
long_query_time=3
#log_queries_not_using_indexes=on
early-plugin-load = ""

innodb_data_home_dir = /opt/mysql/mysql8/data
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /opt/mysql/mysql8/data
innodb_buffer_pool_size = 128M
innodb_log_file_size = 64M
innodb_log_buffer_size = 16M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
innodb_max_dirty_pages_pct = 90
innodb_read_io_threads = 2
innodb_write_io_threads = 2

secure-file-priv = /opt/mysql/mysql8
user=mysql8

mysqlx_socket = /tmp/mysqlx8.sock
mysqlx_port = 33080

[mysqldump]
user=root
password="553057712"
quick
max_allowed_packet = 500M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 32M
sort_buffer_size = 768K
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

 

/opt/mysql/mysql8/mysql/bin/mysqld --defaults-file=/etc/my8.cnf --initialize

复制临时密码第一次登陆时用到 

4.启动mysql8.0 

 /opt/mysql/mysql8/mysql/bin/mysqld_safe --defaults-file=/etc/my8.cnf --user=mysql8

5.重置密码

登陆 

 /opt/mysql/mysql8/mysql/bin/mysql -u root -p -P3308 -S /tmp/mysql8.sock

修改root密码

 ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

6.将之前创建的转储文件加载到新的 MySQL服务器中

/opt/mysql/mysql8/mysql/bin/mysql -u root -p -P 3308 -S /tmp/mysql8.sock --force < /opt/mysql/mysql5.7.36/data-for-upgrade.sql

 执行系统表出现一些错误

 7.执行剩余的升级操作

关闭mysql 

 /opt/mysql/mysql8/mysql/bin/mysqladmin -u root -p -P 3308 -S /tmp/mysql8.sock shutdown

  使用 --upgrade=FORCE 选项重新启动它 执行其余升级任务

/opt/mysql/mysql8/mysql/bin/mysqld_safe --defaults-file=/etc/my8.cnf --upgrade=FORCE --user=mysql8