MySQL5.7安装

1、下载安装包

wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

2、解压到/opt下

[root@Master opt]# tar xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
[root@Master opt]# ll
total 628712
drwxr-xr-x. 9 root root      4096 Jul  6 19:47 mysql-5.7.22-linux-glibc2.12-x86_64
-rw-r--r--. 1 root root 643790848 Jul  6 11:44 mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

3、作软链接到/usr/local/mysql

[root@Master opt]# ln -s /opt/mysql-5.7.22-linux-glibc2.12-x86_64  /usr/local/mysql
[root@Master opt]# ll /usr/local/
total 40
drwxr-xr-x. 2 root root 4096 Sep 23  2011 bin
drwxr-xr-x. 2 root root 4096 Sep 23  2011 etc
drwxr-xr-x. 2 root root 4096 Sep 23  2011 games
drwxr-xr-x. 2 root root 4096 Sep 23  2011 include
drwxr-xr-x. 2 root root 4096 Sep 23  2011 lib
drwxr-xr-x. 2 root root 4096 Sep 23  2011 lib64
drwxr-xr-x. 2 root root 4096 Sep 23  2011 libexec
lrwxrwxrwx. 1 root root   40 Jul  6 20:01 mysql -> /opt/mysql-5.7.22-linux-glibc2.12-x86_64
drwxr-xr-x. 2 root root 4096 Sep 23  2011 sbin
drwxr-xr-x. 5 root root 4096 Feb 16  2017 share
drwxr-xr-x. 2 root root 4096 Sep 23  2011 src

4、创建用户

[root@Master opt]# groupadd mysql 
[root@Master opt]#  useradd -g mysql  -s  /sbin/nologin -d /usr/local/mysql/  -M mysql

5、环境变量

[root@Master opt]# echo PATH=$PATH:/usr/local/mysql/bin >>/etc/profile 
[root@Master opt]# source /etc/profile

6、创建必须的目录

mkdir -p /data/mysql/mysql3306/{data,tmp,logs}

7、生成my.cnf(根据自己需求自动生成)
叶总的配置文件生成工具
http://imysql.com/my-cnf-wizard.html
8、目录权限

[root@Master /]# chown -R mysql:mysql /data/mysql/mysql3306/
[root@Master /]# chown -R mysql:mysql /usr/local/mysql

9、数据库初始化

[root@Master /]# mysqld --defaults-file=/etc/my.cnf --initialize --user=user --basedir=/usr/local/mysql/  --datadir=/data/mysql/mysql3306/data/

10、数据库密码（.lZ!-2t2-n9s）

[root@Master data]# more /data/mysql/mysql3306/data/dataerror.log
2018-07-06T13:46:32.795821Z 1 [Note] A temporary password is generated for root@localhost: .lZ!-2t2-n9s

11、启动数据库

[root@Master support-files]# pwd
/usr/local/mysql/support-files
[root@Master support-files]# cp mysql.server   /etc/init.d/mysqld
[root@Master support-files]# /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!

12、登录数据库

输入第10步的密码
Starting MySQL.. SUCCESS! 
[root@Master support-files]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.22-log

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.

root@Master 21:57:  [(none)]> 
root@Master 21:57:  [(none)]> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement

13、改root密码

[root@Master support-files]# mysqladmin -uroot -p password 'root'
Enter password: 
mysqladmin: [Warning] Using a password on the command line interface can be insecure.
Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety

14、登录数据库

[root@Master support-files]# mysql -uroot -proot                 
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.22-log MySQL Community Server (GPL)

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.

root@Master 22:01:  [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

问题：

初始化时遇到报错
error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory

解决：

yum -y install numactl.x86_64