操作系统环境：

CentOS Linux release 7.4.1708(Core)

MySQL版本：5.7.17

一，卸载mariadb-lib

[root@iZ2ze6jo3o3bqbcongnypqZlib]#rpm -qa|grep mariadb

mariadb-libs-5.5.56-2.el7.x86_64

[root@iZ2ze6jo3o3bqbcongnypqZ~]#yum -y remove mariadb-libs-5.5.56-2.el7.x86_64

Loaded plugins: fastestmirror

Resolving Dependencies

-->Running transaction check

--->Package mariadb-libs.x86_64 1:5.5.56-2.el7 will be erased

-->Processing Dependency: libmysqlclient.so.18()(64bit)forpackage: 2:postfix-2.10.1-6.el7.x86_64

-->Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit)forpackage: 2:postfix-2.10.1-6.el7.x86_64

-->Running transaction check

--->Package postfix.x86_64 2:2.10.1-6.el7 will be erased

-->Processing Dependency:/usr/sbin/sendmailforpackage: redhat-lsb-core-4.1-27.el7.centos.1.x86_64

-->Restarting Dependency Resolution with new changes.

-->Running transaction check

--->Package redhat-lsb-core.x86_64 0:4.1-27.el7.centos.1 will be erased

-->Finished Dependency Resolution

Dependencies Resolved

==============================================================================================================================================================================================================================================================================

Package ArchVersionRepository Size

==============================================================================================================================================================================================================================================================================

Removing:

mariadb-libs x86_64 1:5.5.56-2.el7@base4.4 M

Removingfordependencies:

postfix x86_64 2:2.10.1-6.el7@anaconda12 M

redhat-lsb-core x86_64 4.1-27.el7.centos.1@base45 k

Transaction Summary

==============================================================================================================================================================================================================================================================================

Remove 1 Package(+2 Dependent packages)

Installed size: 17 M

Downloading packages:

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Erasing : redhat-lsb-core-4.1-27.el7.centos.1.x86_64 1/3

Erasing : 2:postfix-2.10.1-6.el7.x86_64 2/3

Erasing : 1:mariadb-libs-5.5.56-2.el7.x86_64 3/3

Verifying : 1:mariadb-libs-5.5.56-2.el7.x86_64 1/3

Verifying : 2:postfix-2.10.1-6.el7.x86_64 2/3

Verifying : redhat-lsb-core-4.1-27.el7.centos.1.x86_64 3/3

Removed:

mariadb-libs.x86_64 1:5.5.56-2.el7

Dependency Removed:

postfix.x86_64 2:2.10.1-6.el7 redhat-lsb-core.x86_64 0:4.1-27.el7.centos.1

Complete!

二，下载mysql5.7.17rpm安装包，具体是mysql-5.7.17-1.el7.x86_64.rpm-bundle.tar

wget https://downloads.mysql.com/archives/get/file/mysql-5.7.17-1.el7.x86_64.rpm-bundle.tar

三，解压

[root@iZ2ze6jo3o3bqbcongnyppZ~]#tar -xvf mysql-5.7.17-1.el7.x86_64.rpm-bundle.tar

-rw-r--r-- 1 7155 31415 25037548 Nov 30 2016 mysql-community-client-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 277812 Nov 30 2016 mysql-community-common-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 3774276 Nov 30 2016 mysql-community-devel-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 45474744 Nov 30 2016 mysql-community-embedded-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 23925668 Nov 30 2016 mysql-community-embedded-compat-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 126047424 Nov 30 2016 mysql-community-embedded-devel-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 2237116 Nov 30 2016 mysql-community-libs-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 2112724 Nov 30 2016 mysql-community-libs-compat-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 54571580 Nov 30 2016 mysql-community-minimal-debuginfo-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 169496800 Nov 30 2016 mysql-community-server-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 14478292 Nov 30 2016 mysql-community-server-minimal-5.7.17-1.el7.x86_64.rpm

-rw-r--r-- 1 7155 31415 116682212 Nov 30 2016 mysql-community-test-5.7.17-1.el7.x86_64.rpm

[root@iZ2ze6jo3o3bqbcongnyppZ~]#rpm-ivh mysql-community-common-5.7.17-1.el7.x86_64.rpm

[root@iZ2ze6jo3o3bqbcongnyppZ~]#rpm-ivh mysql-community-libs-5.7.17-1.el7.x86_64.rpm

[root@iZ2ze6jo3o3bqbcongnyppZ ~]# rpm -ivh mysql-community-libs-compat-5.7.17-1.el7.x86_64

[root@iZ2ze6jo3o3bqbcongnyppZ ~]# rpm -ivh mysql-community-devel-5.7.17-1.el7.x86_64

[root@iZ2ze6jo3o3bqbcongnyppZ~]#rpm-ivh mysql-community-client-5.7.17-1.el7.x86_64.rpm

[root@iZ2ze6jo3o3bqbcongnyppZ~]#rpm-ivh mysql-community-server-5.7.17-1.el7.x86_64.rpm

[root@iZ2ze6jo3o3bqbcongnypoZ~]#rpm -ivh mysql-community-server-5.7.17-1.el7.x86_64.rpm

warning: mysql-community-server-5.7.17-1.el7.x86_64.rpm: Header V3 DSA/SHA1Signature,key ID 5072e1f5: NOKEY

error: Failed dependencies:

libaio.so.1()(64bit)isneeded by mysql-community-server-5.7.17-1.el7.x86_64

libaio.so.1(LIBAIO_0.1)(64bit)isneeded by mysql-community-server-5.7.17-1.el7.x86_64

libaio.so.1(LIBAIO_0.4)(64bit)isneeded by mysql-community-server-5.7.17-1.el7.x86_64

[root@iZ2ze6jo3o3bqbcongnypoZ~]#yum install libaio*

Loaded plugins: fastestmirror

Loading mirror speedsfromcached hostfile

*base: mirrors.cloud.aliyuncs.com

*epel: mirrors.cloud.aliyuncs.com

*extras: mirrors.cloud.aliyuncs.com

*updates: mirrors.cloud.aliyuncs.com

Resolving Dependencies

-->Running transaction check

--->Package libaio.x86_64 0:0.3.109-13.el7 will be installed

--->Package libaio-devel.x86_64 0:0.3.109-13.el7 will be installed

-->Finished Dependency Resolution

Dependencies Resolved

==============================================================================================================================================================================================================================================================================

Package ArchVersionRepository Size

==============================================================================================================================================================================================================================================================================

Installing:

libaio x86_64 0.3.109-13.el7 base 24 k

libaio-devel x86_64 0.3.109-13.el7 base 13 k

Transaction Summary

==============================================================================================================================================================================================================================================================================

Install 2 Packages

Total download size: 37 k

Installed size: 46 k

Isthis ok[y/d/N]:y

Downloading packages:

(1/2):libaio-0.3.109-13.el7.x86_64.rpm|24 kB 00:00:00

(2/2):libaio-devel-0.3.109-13.el7.x86_64.rpm|13 kB 00:00:00

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Total 243 kB/s|37 kB 00:00:00

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Warning: RPMDB altered outside of yum.

Installing : libaio-0.3.109-13.el7.x86_64 1/2

Installing : libaio-devel-0.3.109-13.el7.x86_64 2/2

Verifying : libaio-0.3.109-13.el7.x86_64 1/2

Verifying : libaio-devel-0.3.109-13.el7.x86_64 2/2

Installed:

libaio.x86_64 0:0.3.109-13.el7 libaio-devel.x86_64 0:0.3.109-13.el7

Complete!

[root@iZ2ze6jo3o3bqbcongnypqZmysql]#cat/var/log/mysqld.log

2017-11-03T08:41:25.257336Z 0[Warning]TIMESTAMPwith implicitDEFAULTvalueisdeprecated.Please use --explicit_defaults_for_timestamp server option(see documentationformore details).

2017-11-03T08:41:26.329912Z 0[Warning]InnoDB: Newlogfiles created,LSN=45790

2017-11-03T08:41:26.543807Z 0[Warning]InnoDB: Creating foreign key constraint system tables.

2017-11-03T08:41:26.566468Z 0[Warning]No existingUUIDhas been found,so we assume that thisisthefirsttimethat this server has been started.Generating a newUUID:c79a2e4b-c072-11e7-b809-00163e0ad76e.

2017-11-03T08:41:26.570349Z 0[Warning]Gtidtableisnotreadytobe used.Table'mysql.gtid_executed'cannot be opened.

2017-11-03T08:41:26.571065Z 1[Note]A temporarypasswordisgeneratedforroot@localhost:7PkQ:l<p2cpH

[root@iZ2ze6jo3o3bqbcongnyppZ~]#systemctl start mysqld.service

[root@iZ2ze6jo3o3bqbcongnyppZ~]#mysql -uroot -p

Enterpassword:

Welcometothe MySQL monitor.Commandsendwith;or\g.

Your MySQL connection idis3

Serverversion:5.7.17

Copyright(c)2000,2016,Oracleand/orits affiliates.All rights reserved.

Oracleisa registered trademark of Oracle Corporationand/orits

affiliates.Other names may be trademarks of their respective

owners.

Type'help;'or'\h'forhelp.Type'\c'toclear the current input statement.

mysql>

mysql>showdatabases;

ERROR 1820(HY000):You mustresetyourpasswordusing ALTERUSERstatement before executing this statement.

ALTERUSER'root'@'localhost'IDENTIFIED BY'yournew_password';