一、升级前环境
升级时间：2021-03-30
MySQL数据库版本：5.6.51
操作系统版本：CentOS release 6.10 (Final)
如下图：
升级前版本
升级前repos（
/etc/yum.repos.d/mysql-community.repo）文件如下：
[mysql-connectors-community]
name=MySQL Connectors Community
baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql-tools-community]
name=MySQL Tools Community
baseurl=http://repo.mysql.com/yum/mysql-tools-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.5
[mysql55-community]
name=MySQL 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.6
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Note: MySQL 5.7 is currently in development. For use at your own risk.
# Please read with sub pages: https://dev.mysql.com/doc/relnotes/mysql/5.7/en/
[mysql57-community-dmr]
name=MySQL 5.7 Community Server Development Milestone Release
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
二、升级
1、修改repos文件
/etc/yum.repos.d/mysql-community.repo
将repos文件中MySQL5.6中的enabled=1改为enabled=0，将MySQL5.7中的enabled=0改为enabled=1
2、升级命令如下
yum update
执行结果如下：
[root@= /etc/yum.repos.d]# yum update
Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Update Process
Loading mirror speeds from cached hostfile
mysql-connectors-community | 2.6 kB 00:00
mysql-tools-community | 2.6 kB 00:00
mysql57-community-dmr | 2.6 kB 00:00
mysql57-community-dmr/primary_db | 257 kB 00:00
Resolving Dependencies
--> Running transaction check
---> Package mysql-community-client.x86_64 0:5.6.51-2.el6 will be updated
---> Package mysql-community-client.x86_64 0:5.7.33-1.el6 will be an update
---> Package mysql-community-common.x86_64 0:5.6.51-2.el6 will be updated
---> Package mysql-community-common.x86_64 0:5.7.33-1.el6 will be an update
---> Package mysql-community-libs.x86_64 0:5.6.51-2.el6 will be updated
---> Package mysql-community-libs.x86_64 0:5.7.33-1.el6 will be an update
---> Package mysql-community-server.x86_64 0:5.6.51-2.el6 will be updated
---> Package mysql-community-server.x86_64 0:5.7.33-1.el6 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
==================================================================================================================================
Package Arch Version Repository Size
==================================================================================================================================
Updating:
mysql-community-client x86_64 5.7.33-1.el6 mysql57-community-dmr 25 M
mysql-community-common x86_64 5.7.33-1.el6 mysql57-community-dmr 367 k
mysql-community-libs x86_64 5.7.33-1.el6 mysql57-community-dmr 2.4 M
mysql-community-server x86_64 5.7.33-1.el6 mysql57-community-dmr 162 M
Transaction Summary
==================================================================================================================================
Upgrade 4 Package(s)
Total download size: 189 M
Is this ok [y/N]: y
Downloading Packages:
(1/4): mysql-community-client-5.7.33-1.el6.x86_64.rpm | 25 MB 00:04
(2/4): mysql-community-common-5.7.33-1.el6.x86_64.rpm | 367 kB 00:00
(3/4): mysql-community-libs-5.7.33-1.el6.x86_64.rpm | 2.4 MB 00:00
(4/4): mysql-community-server-5.7.33-1.el6.x86_64.rpm | 162 MB 00:24
----------------------------------------------------------------------------------------------------------------------------------
Total 6.3 MB/s | 189 MB 00:30
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : mysql-community-common-5.7.33-1.el6.x86_64 1/8
Updating : mysql-community-libs-5.7.33-1.el6.x86_64 2/8
Updating : mysql-community-client-5.7.33-1.el6.x86_64 3/8
Updating : mysql-community-server-5.7.33-1.el6.x86_64 4/8
Cleanup : mysql-community-server-5.6.51-2.el6.x86_64 5/8
Cleanup : mysql-community-client-5.6.51-2.el6.x86_64 6/8
Cleanup : mysql-community-libs-5.6.51-2.el6.x86_64 7/8
Cleanup : mysql-community-common-5.6.51-2.el6.x86_64 8/8
Verifying : mysql-community-common-5.7.33-1.el6.x86_64 1/8
Verifying : mysql-community-libs-5.7.33-1.el6.x86_64 2/8
Verifying : mysql-community-client-5.7.33-1.el6.x86_64 3/8
Verifying : mysql-community-server-5.7.33-1.el6.x86_64 4/8
Verifying : mysql-community-server-5.6.51-2.el6.x86_64 5/8
Verifying : mysql-community-common-5.6.51-2.el6.x86_64 6/8
Verifying : mysql-community-libs-5.6.51-2.el6.x86_64 7/8
Verifying : mysql-community-client-5.6.51-2.el6.x86_64 8/8
Updated:
mysql-community-client.x86_64 0:5.7.33-1.el6 mysql-community-common.x86_64 0:5.7.33-1.el6
mysql-community-libs.x86_64 0:5.7.33-1.el6 mysql-community-server.x86_64 0:5.7.33-1.el6
Complete!
查看版本：
[root@= /etc/yum.repos.d]# mysql -V
mysql Ver 14.14 Distrib 5.7.33, for Linux (x86_64) using EditLine wrapper
[root@= /etc/yum.repos.d]#
三、升级后使用Navicat连接报错：Error occurred: Cannot setup server variables.
解决
1、修改/etc/my.cnf
添加root用户登录信息，如下：
新增用户信息
2、重启mysql
# CentOS6
service mysqld restart
# CentOS7
systemctl restart mysqld
3、升级mysql
cd /usr/bin
mysql_upgrade -s -p # 执行后，输入root密码等待一会儿即可
如下图：
升级ing
4、登录测试
登录后查看数据库
再次使用Navicat连接就可以了！
后记
留存CentOS6.10的yum文件
/etc/yum.repos.d/CentOS-Base.repo如下
[base]
name=CentOS-6
failovermethod=priority
# 这个是官方的源 但是速度特别的慢，大概20kb吧，直接注释掉
#baseurl=https://vault.centos.org/6.10/os/x86_64/
# 搜狐源 网速200k左右，比较给力饿了
baseurl=http://mirrors.sohu.com/centos/6.10/os/x86_64/
gpgcheck=0
End
参考
- MYSQL5.6升级为MYSQL5.7运行mysql_upgrade 报Error occurred: Cannot setup server variables.错误