MySQL 8.0正式版8.0.11已正式发布，在这之前，我们已了解到该版本的巨大变化，为了一探究竟，咱们先装上再说。
下载 wget https://dev.mysql.com/downloads/file/?id=476451
CentOS系统
[root@DBTest38 opt]# uname -a Linux DBTest38 2.6.32-642.15.1.el6.x86_64
新建安装、数据库目录
mkdir /opt/mysql mkdir /data/mysql/mysql3306
新建mysql用户
groupadd mysql useradd -g mysql mysql
解压安装包
cd /opt/mysql tar zxvf mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz #V5.7 V8.0文件大小比较，8.0相对来说变小了 623M mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz 2.5G ./mysql-5.7.17-linux-glibc2.5-x86_64 1.3G ./mysql-5.7.17-linux-glibc2.5-x86_64/bin 575M mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz 1.8G ./mysql/mysql-8.0.11-linux-glibc2.12-x86_64 1.5G ./mysql/mysql-8.0.11-linux-glibc2.12-x86_64/bin
建立源文件链接 ln -s /opt/mysql/mysql-8.0.11-linux-glibc2.12-x86_64 /usr/local/mysql
修改目录权限
chown -R mysql:mysql /usr/local/mysql chown -R mysql:mysql /opt/mysql chown -R mysql:mysql /data/mysql/mysql3306
简单的配置my.cnf
[root@DBTest38 mysql]# cat /etc/my.cnf [client] port = 3306 socket = /tmp/mysql.sock [mysqld] port = 3306 user = mysql socket = /tmp/mysql.sock basedir = /usr/local/mysql datadir = /data/mysql/mysql3306/ log-error = error.log server-id = 330638
初始化数据库
#有密码初始化 mysqld --defaults-file=/etc/my.cnf --initialize #无密码初始化 mysqld --defaults-file=/etc/my.cnf --initialize-insecure
启动数据库 mysqld --defaults-file=/etc/my.cnf &
获取数据库临时密码 ，登录数据库
[root@DBTest38 mysql3306]# cat error.log |grep password 2018-04-23T06:43:28.740843Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: woE5?dj<ocad
[root@DBTest38 mysql3306]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 8 Server version: 8.0.11 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. (product)root@localhost [(none)]> show databases; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. #第一次登录后需要修改root密码 (product)root@localhost [(none)]> alter user root@localhost identified by 'root'; Query OK, 0 rows affected (0.08 sec) (product)root@localhost [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | +--------------------+ 4 rows in set (0.07 sec)
简单看了看数据目录下的文件，发现两个很有意思的问题：
#mysql库下mysql等表不见了，V5.7版本前修改root密码的黑科技估计是用不了 [root@DBTest38 mysql3306]# ll /data/mysql/mysql3306/mysql total 28 -rw-r----- 1 mysql mysql 5521 Apr 23 14:43 general_log_195.sdi -rw-r----- 1 mysql mysql 35 Apr 23 14:43 general_log.CSM -rw-r----- 1 mysql mysql 0 Apr 23 14:43 general_log.CSV -rw-r----- 1 mysql mysql 11746 Apr 23 14:43 slow_log_196.sdi -rw-r----- 1 mysql mysql 35 Apr 23 14:43 slow_log.CSM -rw-r----- 1 mysql mysql 0 Apr 23 14:43 slow_log.CSV
# undo从ibdata中拆分出来了 [root@DBTest38 mysql3306]# ll total 168016 -rw-r----- 1 mysql mysql 56 Apr 23 14:43 auto.cnf -rw-r----- 1 mysql mysql 850 Apr 23 15:46 binlog.000001 -rw-r----- 1 mysql mysql 16 Apr 23 14:46 binlog.index -rw------- 1 mysql mysql 1680 Apr 23 14:43 ca-key.pem -rw-r--r-- 1 mysql mysql 1112 Apr 23 14:43 ca.pem -rw-r--r-- 1 mysql mysql 1112 Apr 23 14:43 client-cert.pem -rw------- 1 mysql mysql 1680 Apr 23 14:43 client-key.pem -rw-r----- 1 mysql mysql 5 Apr 23 14:46 DBTest38.pid -rw-r----- 1 mysql mysql 969 Apr 23 14:46 error.log -rw-r----- 1 mysql mysql 5927 Apr 23 14:43 ib_buffer_pool -rw-r----- 1 mysql mysql 12582912 Apr 23 15:46 ibdata1 -rw-r----- 1 mysql mysql 50331648 Apr 23 15:46 ib_logfile0 -rw-r----- 1 mysql mysql 50331648 Apr 23 14:43 ib_logfile1 -rw-r----- 1 mysql mysql 12582912 Apr 23 14:46 ibtmp1 drwxr-x--- 2 mysql mysql 4096 Apr 23 14:43 mysql -rw-r----- 1 mysql mysql 25165824 Apr 23 15:46 mysql.ibd drwxr-x--- 2 mysql mysql 4096 Apr 23 14:43 performance_schema -rw------- 1 mysql mysql 1676 Apr 23 14:43 private_key.pem -rw-r--r-- 1 mysql mysql 452 Apr 23 14:43 public_key.pem -rw-r--r-- 1 mysql mysql 1112 Apr 23 14:43 server-cert.pem -rw------- 1 mysql mysql 1676 Apr 23 14:43 server-key.pem drwxr-x--- 2 mysql mysql 4096 Apr 23 14:43 sys -rw-r----- 1 mysql mysql 10485760 Apr 23 15:46 undo_001 -rw-r----- 1 mysql mysql 10485760 Apr 23 15:46 undo_002 drwxr-x--- 2 mysql mysql 4096 Apr 23 15:46 yxli
至于8.0还有哪些变化，等后续慢慢发现了，今天的安装篇就到这里了。