centos下安装mysql5.7.23

1、检查是否mysql

[root@node01 ~]# rpm -qa | grep -i mysql
mysql-5.1.71-1.el6.x86_64
mysql-devel-5.1.71-1.el6.x86_64
perl-DBD-MySQL-4.013-3.el6.x86_64
mysql-server-5.1.71-1.el6.x86_64
mysql-libs-5.1.71-1.el6.x86_64
qt-mysql-4.6.2-26.el6_4.x86_64

可以看到是mysql5.1，版本较低，卸载

2、卸载mysql

#卸载与mysql相关的服务
yum -y remove *mysql* 

#查找相关目录，手动删除

find / -name *mysql*

3、下载mysq5.7安装包

下载 https://dev.mysql.com/downloads/mysql/5.7.html，如下图

4、解压到安装包

#创建解压目录
mkdir mysql-rpm

#解压安装包到创建的目录下
tar -xvf mysql-5.7.23-1.el6.x86_64.rpm-bundle.tar -C ./mysql-rpm
#解压如下
mysql-community-embedded-5.7.23-1.el6.x86_64.rpm
mysql-community-embedded-devel-5.7.23-1.el6.x86_64.rpm
mysql-community-test-5.7.23-1.el6.x86_64.rpm
mysql-community-client-5.7.23-1.el6.x86_64.rpm
mysql-community-libs-5.7.23-1.el6.x86_64.rpm
mysql-community-devel-5.7.23-1.el6.x86_64.rpm
mysql-community-server-5.7.23-1.el6.x86_64.rpm
mysql-community-libs-compat-5.7.23-1.el6.x86_64.rpm
mysql-community-common-5.7.23-1.el6.x86_64.rpm

5、进入mysql-rpm 安装mysql

按照common > libs > libs-compat > client > server 依次安装

[root@node04 software]# rpm -ivh mysql-community-common-5.7.23-1.el6.x86_64.rpm
warning: mysql-community-common-5.7.23-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-common ########################################### [100%]
[root@node04 software]# rpm -ivh mysql-community-libs-5.7.23-1.el6.x86_64.rpm
warning: mysql-community-libs-5.7.23-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-libs   ########################################### [100%]
[root@node04 software]# rpm -ivh mysql-community-libs-compat-5.7.23-1.el6.x86_64.rpm 
warning: mysql-community-libs-compat-5.7.23-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-libs-co########################################### [100%]
[root@node04 software]# 
[root@node04 software]# rpm -ivh mysql-community-client-5.7.23-1.el6.x86_64.rpm
warning: mysql-community-client-5.7.23-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-client ########################################### [100%]
[root@node04 software]# rpm -ivh mysql-community-server-5.7.23-1.el6.x86_64.rpm
warning: mysql-community-server-5.7.23-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                ########################################### [100%]
   1:mysql-community-server ########################################### [100%]

6、查看密码，mysql5.7启动时为root用户随机生成了一个临时密码，在mysqld.log中

7、启动mysql服务

[root@node04 software]# service mysqld start
Initializing MySQL database:                               [  OK  ]
Starting mysqld:                                           [  OK  ]

8、输入密码，进入客户端

[root@node04 log]# mysql -u root -p
Enter password:

9、查看默认密码校验要求

可以通过set global Variable_name=Value 改变密码校验，或者直接关闭密码校验，见9

mysql> show variables like 'validate_password%';
+--------------------------------------+--------+
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| validate_password_dictionary_file    |        |
| validate_password_length             | 8      |
| validate_password_mixed_case_count   | 1      |
| validate_password_number_count       | 1      |
| validate_password_policy             | MEDIUM |
| validate_password_special_char_count | 1      |
+--------------------------------------+--------+
7 rows in set (0.00 sec)

10、禁用密码强度校验

[root@node04 log]# vim /etc/my.cnf

datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

#加入以下，关闭校验插件
plugin-load=validate_password.so
validate-password=OFF

11、用root用户登录后，为了安全，mysql5.7要求改变密码才能继续操作

[root@node04 software]# mysql -u root -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.7.23

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.
#设置密码强度级别，测试用设置简单，生产用设置复杂
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)

#修改密码
mysql> set password for 'root'@'localhost'=password('12345678');
Query OK, 0 rows affected, 1 warning (0.00 sec)

12、授予任何ip通过root用户访问权限

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678' WITH GRANT OPTION;          
Query OK, 0 rows affected, 1 warning (0.00 sec)
#刷新，使权限生效
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> quit
Bye

13、查看更已经生效

mysql> select user,host from mysql.user;
+---------------+-----------+
| user          | host      |
+---------------+-----------+
| root          | %         |
| mysql.session | localhost |
| mysql.sys     | localhost |
| root          | localhost |
+---------------+-----------+
7 rows in set (0.00 sec)

centos下安装mysql5.7.23

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