mysql二进制安装，升级，多实例部署

目标

理解线上部署考虑的因素
学会编译安装以及二进制安装mysql
学会升级mysql
学会多实例部署mysql数据库
学会合理部署mysql线上库

考虑因素：

版本选择，5.1,5.5还是5.6？
分支选择，官方社区版？percona server？mariadb?
- 推荐官方版，简单易上手
安装方式，包安装？二进制包安装？源码安装？
- 线上推荐二进制包安装
路径配置，参数配置（尽量模板化，标准化）
一个实例多个库，or多个实例单个库？

二进制安装mysql

下载软件安装包
解压放到指定目录（比如/usr/local）并将mysql目录放到PATH中
初始化实例，编辑配置文件并启动
账号安全设置

1)下载
mysql-5.5.50-linux2.6-i686

2)解压到指定目录，并将mysql目录放到PATH中

#tar -zxf mysql-5.5.50-linux2.6-i686.tar.gz#mv mysql-5.5.50-linux2.6-i686 /usr/local/#cd /usr/local#mv mysql-5.5.50-linux2.6-i686 mysql55#cd mysql55/bin#export PATH=/usr/local/mysql55/bin:$PATH

3)初始化实例使用脚本mysql_install_db

#mkdir -p /tmp/mysqldata/node1#/usr/local/mysql55/script/mysql_install_db --user=mysql --basedir=/usr/local/mysql55 --datadir=/tmp/mysqldata/node1#cd /tmp/mysqldata/node1

出现问题1 没有libaio.so.1库

/tmp/mysql55/bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

解决：查询libaio库并按照libaio.so.1
查询

aiapple@aiapple:/tmp$ sudo apt-cache search libaiolibaio-dev - Linux kernel AIO access library - development fileslibaio1 - Linux kernel AIO access library - shared librarylibaio1-dbg - Linux kernel AIO access library - debugging symbols

安装

aiapple@aiapple:/tmp$ sudo apt-get install libaio1

初始化成功：

aiapple@aiapple:/usr/local/mysql/data$ ls -l /tmp/mysqldata/node1/total 12drwx------ 2 aiapple aiapple 4096 7月 27 21:27 mysqldrwx------ 2 aiapple aiapple 4096 7月 27 21:27 performance_schemadrwx------ 2 aiapple aiapple 4096 7月 27 21:25 test

拷贝配置文件：support-files中拷贝my-medium.cnf

cp /usr/local/mysql56/support-files/my-medium.cnf /tmp/mysqldata

3)使用mysqld_safe脚本，启动

/usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &

问题2：没有/usr/local/mysql/data 目录

aiapple@aiapple:/usr/local/mysql55/support-files$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 3349aiapple@aiapple:/usr/local/mysql55/support-files$ 160727 21:33:26 mysqld_safe Logging to '/usr/local/mysql/data/aiapple.err'.touch: cannot touch ‘/usr/local/mysql/data/aiapple.err’: No such file or directorychmod: cannot access ‘/usr/local/mysql/data/aiapple.err’: No such file or directory160727 21:33:26 mysqld_safe The file /usr/local/mysql/bin/mysqlddoes not exist or is not executable. Please cd to the mysql installationdirectory and restart this script from there as follows:./bin/mysqld_safe&See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information/usr/local/mysql55/bin/mysqld_safe: 128: /usr/local/mysql55/bin/mysqld_safe: cannot create /usr/local/mysql/data/aiapple.err: Directory nonexistent^C[1]+ Exit 1         /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

View Code

解决：创建目录并赋权

aiapple@aiapple:/usr/local$ sudo mkdir -p mysql/dataaiapple@aiapple:/usr/local/mysql$ sudo chown -R aiapple .aiapple@aiapple:/usr/local/mysql$ sudo chgrp -R aiapple .

问题3：不存/usr/local/mysql/bin/mysqld 文件

aiapple@aiapple:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 3773aiapple@aiapple:/usr/local/mysql$ 160727 21:37:32 mysqld_safe Logging to '/usr/local/mysql/data/aiapple.err'.160727 21:37:32 mysqld_safe The file /usr/local/mysql/bin/mysqlddoes not exist or is not executable. Please cd to the mysql installationdirectory and restart this script from there as follows:./bin/mysqld_safe&See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information^C[1]+ Exit 1         /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

View Code

怀疑 Ubuntu定死了basedir 在/usr/local/mysql 下
解决：拷贝mysql55中内容到该目录中

aiapple@aiapple:/usr/local/mysql$ cp -ar ../mysql55/* .

问题4：mysqld从 /usr/local/mysql/data中启动库文件；

aiapple@aiapple:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 3983aiapple@aiapple:/usr/local/mysql$ 160727 21:39:05 mysqld_safe Logging to '/usr/local/mysql/data/aiapple.err'.160727 21:39:05 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data160727 21:39:07 mysqld_safe mysqld from pid file /usr/local/mysql/data/aiapple.pid ended [1]+ Done          /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf且mysqld没有启动aiapple@aiapple:~$ ps -ef | grep mysqldaiapple  2129 2097 0 19:35 pts/2  00:00:00 grep --color=auto mysqld

View Code

查看aiapple.err:需要的一些表不在/usr/local/mysql/data

160727 21:41:59 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data160727 21:41:59 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.50-log) starting as process 4500 ...160727 21:41:59 [Note] Plugin 'FEDERATED' is disabled./usr/local/mysql/bin/mysqld: Table 'mysql.plugin' doesn't exist160727 21:41:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.160727 21:41:59 InnoDB: The InnoDB memory heap is disabled160727 21:41:59 InnoDB: Mutexes and rw_locks use GCC atomic builtins160727 21:41:59 InnoDB: Compressed tables use zlib 1.2.3160727 21:41:59 InnoDB: Using Linux native AIO160727 21:41:59 InnoDB: Initializing buffer pool, size = 128.0M160727 21:41:59 InnoDB: Completed initialization of buffer pool160727 21:41:59 InnoDB: highest supported file format is Barracuda.InnoDB: Log scan progressed past the checkpoint lsn 48941160727 21:41:59 InnoDB: Database was not shut down normally!InnoDB: Starting crash recovery.InnoDB: Reading tablespace information from the .ibd files...InnoDB: Restoring possible half-written data pages from the doublewriteInnoDB: buffer...InnoDB: Doing recovery: scanned up to log sequence number 1595675160727 21:41:59 InnoDB: Starting an apply batch of log records to the database...InnoDB: Progress in percents: 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99InnoDB: Apply batch completed160727 21:41:59 InnoDB: Waiting for the background threads to start160727 21:42:00 InnoDB: 5.5.50 started; log sequence number 1595675160727 21:42:00 [Note] Recovering after a crash using mysql-bin160727 21:42:00 [Note] Starting crash recovery...160727 21:42:00 [Note] Crash recovery finished.160727 21:42:00 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306160727 21:42:00 [Note]  - '0.0.0.0' resolves to '0.0.0.0';160727 21:42:00 [Note] Server socket created on IP: '0.0.0.0'.160727 21:42:00 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist160727 21:42:00 mysqld_safe mysqld from pid file /usr/local/mysql/data/aiapple.pid ended

View Code

解决：将原初始化的datadir目录中所有拷贝过去

aiapple@aiapple:/usr/local/mysql/data$ rm -rf test/aiapple@aiapple:/usr/local/mysql/data$ cp -ar /tmp/mysqldata/node1/* .

成功安装：

aiapple@aiapple:/usr/local/mysql/data$ ps -ef | grep mysqldaiapple  4536 2146 0 21:43 pts/0  00:00:00 /bin/sh /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnfaiapple  4773 4536 1 21:43 pts/0  00:00:00 /usr/local/mysql/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/usr/local/mysql/data/aiapple.err --pid-file=/usr/local/mysql/data/aiapple.pid --socket=/tmp/mysql.sock --port=3306aiapple  4792 2097 0 21:44 pts/2  00:00:00 grep --color=auto mysqld

View Code

疑问：
不知是Ubuntu指定了basedir=/usr/local/mysql,datadir=/usr/local/mysql/data;还是最开始的初始化没有管用，还是有什么配置没有写在配置文件中。

当然是没有写在配置文件中了，可以查看一下my-medium.cnf内容

[client]#password    = your_passwordport      = 3306socket     = /tmp/mysql.sock # Here follows entries for some specific programs # The MySQL server[mysqld]port      = 3306socket     = /tmp/mysql.sockskip-external-lockingkey_buffer_size = 16Mmax_allowed_packet = 1Mtable_open_cache = 64sort_buffer_size = 512Knet_buffer_length = 8Kread_buffer_size = 256Kread_rnd_buffer_size = 512Kmyisam_sort_buffer_size = 8M

View Code

没有相关目录的配置；

增加启动配置参考：mysqld_safe — MySQL Server Startup Script

在my.cnf 增加一下配置

my.cnfport      = 3306socket     = /tmp/mysqldata/node1/mysql.sock [mysqld_safe]user=aiapple # Here follows entries for some specific programs # The MySQL server[mysqld]port      = 3306socket     = /tmp/mysqldata/node1/mysql.sockpid-file    = /tmp/mysqldata/node1/mysqld.pidbasedir     = /usr/local/mysql55datadir     = /tmp/mysqldata/node1innodb_data_home_dir = /tmp/mysqldata/node1innodb_log_group_home_dir =/tmp/mysqldata/node1tmpdir     = /tmp/mysqldata/node1log-error    = /tmp/mysqldata/node1/aiapple.loglog-bin     = /tmp/mysqldata/node1/mysql-bin.log

View Code

重新启动
问题一：配置文件权限太大

aiapple@aiapple:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &Warning: World-writable config file '/tmp/mysqldata/my.cnf' is ignored

解决：降权

aiapple@aiapple:sudo chmod 600 /tmp/mysqldata/my.cnf

问题二：bin目录未指定

aiapple@aiapple:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &160806 16:07:29 mysqld_safe The file /usr/local/mysql/bin/mysqld does not exist or is not executable. Please cd to the mysql installationdirectory and restart this script from there as follows: ./bin/mysqld_safe&

解决：在配置文件中通过ledir指定bin目录

#my.cnf增加ledir = /usr/local/mysql55

问题三：aiapple.err报错，插件被禁止

160806 16:48:46 [Note] Plugin 'FEDERATED' is disabled.160806 16:48:46 InnoDB: The InnoDB memory heap is disabled160806 16:48:46 InnoDB: Mutexes and rw_locks use GCC atomic builtins160806 16:48:46 InnoDB: Compressed tables use zlib 1.2.3160806 16:48:46 InnoDB: Using Linux native AIO160806 16:48:46 InnoDB: Initializing buffer pool, size = 128.0M

View Code

解决：在配置文件中启用，nice=0

#my.cnf增加nice = 0

4)账号安全设置

#删除空用户

mysql -uroot --socket=/tmp/mysql.sockselect user,host,password from mysql.user;delete from mysql.user where user='';delete from mysql.user where host<>'localhost'; mysql> select user,host,password from mysql.user;+------+-----------+----------+| user | host   | password |+------+-----------+----------+| root | localhost |     |+------+-----------+----------+1 row in set (0.00 sec)

#设置root密码

mysql> set password for root@'localhost'=password('000000');Query OK, 0 rows affected (0.00 sec)

#使设置生效

flush privileges;

#删除test库

看看只读权限的test用户能用test库做什么

创建test用户#mysql -uroot -p123456--socket=/tmp/mysql.sockgrant select on *.* to test@'localhost' identified by '123'; 使用test用户，在test库中建表#mysql -utest -p123 --socket=/tmp/mysql.sockuse testcreate table t1(id int);mysql> show tables;+----------------+| Tables_in_test |+----------------+| t1       |+----------------+1 row in set (0.01 sec)

删除test库

mysql> drop database test;Query OK, 1 row affected (0.01 sec)

mysql升级

从5.5升级到5.6

下载mysql5.6安装包并配置mysql5.6安装包安装路径
关闭mysql5.5的实例，修改部分参数，使用mysql5.6软件启动
执行mysql5.6路径下mysql_upgrade脚本
验证是否成功升级

MySQL升级

1)关闭mysql
查看mysql是否启动

aiapple@aiapple:/tmp/mysqldata$ ps -ef | grep mysqldaiapple  4931 2146 0 22:32 pts/0  00:00:00 /bin/sh /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnfaiapple  5168 4931 0 22:32 pts/0  00:00:00 /usr/local/mysql/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/usr/local/mysql/data/aiapple.err --pid-file=/usr/local/mysql/data/aiapple.pid --socket=/tmp/mysql.sock --port=3306aiapple  5187 4889 0 22:33 pts/13  00:00:00 grep --color=auto mysqld

使用mysqladmin工具关闭mysql服务

aiapple@aiapple:/usr/local/mysql$ mysqladmin -uroot --socket=/tmp/mysql.sock shutdown -pEnter password:160727 22:28:46 mysqld_safe mysqld from pid file /usr/local/mysql/data/aiapple.pid ended[1]+ Done          /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf (wd: /usr/local/mysql/data)(wd now: /usr/local/mysql)

检查是否关闭

aiapple@aiapple:/usr/local/mysql$ ps -ef | grep mysqldaiapple  4918 2146 0 22:28 pts/0  00:00:00 grep --color=auto mysqld

2)更改my.cnf

#vim my.cnf(把55目录都改成56的)

3）使用mysql5.6启动软件；
#使用5.6拉起实例

aiapple@aiapple:/tmp/mysqldata$ /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 9121aiapple@aiapple:/tmp/mysqldata$ 160806 21:29:11 mysqld_safe Logging to '/tmp/mysqldata/node1/aiapple.log'.160806 21:29:11 mysqld_safe Starting mysqld daemon with databases from /tmp/mysqldata/node1

#查看mysqld进程有没有起来

aiapple@aiapple:/tmp/mysqldata$ ps -ef | grep mysqlaiapple  9121 8547 0 21:29 pts/2  00:00:00 /bin/sh /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnfaiapple  9489 9121 0 21:29 pts/2  00:00:00 /usr/local/mysql56/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node1 --plugin-dir=/usr/local/mysql56/lib/plugin --log-error=/tmp/mysqldata/node1/aiapple.log --pid-file=/tmp/mysqldata/node1/mysqld.pid --socket=/tmp/mysqldata/node1/mysql.sock --port=3306aiapple  9564 8547 0 21:35 pts/2  00:00:00 grep --color=auto mysql

#登陆后查看mysql状态

mysql> status--------------mysql Ver 14.14 Distrib 5.6.32, for linux-glibc2.5 (x86_64) using EditLine wrapper Connection id:    3Current database:  Current user:    root@localhostSSL:      Not in useCurrent pager:    stdoutUsing outfile:    ''Using delimiter:  ;Server version:    5.6.32-log MySQL Community Server (GPL)Protocol version:  10Connection:    Localhost via UNIX socketServer characterset:  latin1Db   characterset:  latin1Client characterset:  utf8Conn. characterset:  utf8UNIX socket:    /tmp/mysqldata/node1/mysql.sockUptime:      7 min 27 sec Threads: 1 Questions: 5 Slow queries: 0 Opens: 32 Flush tables: 1 Open tables: 25 Queries per second avg: 0.011--------------

View Code

4）升级库mysql_upgrade

aiapple@aiapple:/tmp/mysqldata$ /usr/local/mysql56/bin/mysql_upgrade -uroot --socket=/tmp/mysqldata/node1/mysql.sock -pEnter password:Looking for 'mysql' as: /usr/local/mysql56/bin/mysqlLooking for 'mysqlcheck' as: /usr/local/mysql56/bin/mysqlcheckRunning 'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.Running 'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.mysql.columns_priv                 OKmysql.db                      OKmysql.event                    OKmysql.func                     OKmysql.general_log                 OKmysql.help_category                OKmysql.help_keyword                 OKmysql.help_relation                OKmysql.help_topic                  OKmysql.host                     OKmysql.ndb_binlog_index               OKmysql.plugin                    OKmysql.proc                     OKmysql.procs_priv                  OKmysql.proxies_priv                 OKmysql.servers                   OKmysql.slow_log                   OKmysql.tables_priv                 OKmysql.time_zone                  OKmysql.time_zone_leap_second            OKmysql.time_zone_name                OKmysql.time_zone_transition             OKmysql.time_zone_transition_type          OKmysql.user                     OKRunning 'mysql_fix_privilege_tables'...Warning: Using a password on the command line interface can be insecure.Running 'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.Running 'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.OK

View Code

#验证库有没有升级成功

aiapple@aiapple:/tmp/mysqldata$ /usr/local/mysql56/bin/mysql_upgrade -uroot --socket=/tmp/mysqldata/node1/mysql.sock -pEnter password:Looking for 'mysql' as: /usr/local/mysql56/bin/mysqlLooking for 'mysqlcheck' as: /usr/local/mysql56/bin/mysqlcheckThis installation of MySQL is already upgraded to 5.6.32, use --force if you still need to run mysql_upgrade

mysql多实例安装

部署好mysql软件
编辑多个配置文件，初始化多个实例
启动mysql实例

为啥多实例部署？

充分利用系统资源
资源隔离
业务，模块隔离

多实例安装

#mkdir -p /mysqldata/node3

a) 初始化实例使用脚本mysql_install_db

aiapple@aiapple:/tmp/mysqldata/node1$ /usr/local/mysql56/scripts/mysql_install_db --user=aiapple --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node3#查看aiapple@aiapple:/tmp/mysqldata/node1$ ls ../node3ibdata1 ib_logfile0 ib_logfile1 mysql performance_schema test

b) 给node3配置文件

cp my2.cnf my3.cnfvim my3.cnf(修改相关参数)[client]#password    = your_passwordport      = 3308socket     = /tmp/mysqldata/node3/mysql.sock [mysqld_safe]user=aiappleledir = /usr/local/mysql56/bin#ledir = /usr/local/mysql55/binnice = 0# Here follows entries for some specific programs # The MySQL server[mysqld]port      = 3308socket     = /tmp/mysqldata/node3/mysql.sockpid-file    = /tmp/mysqldata/node3/mysqld.pidbasedir     = /usr/local/mysql56#basedir     = /usr/local/mysql55datadir     = /tmp/mysqldata/node3innodb_data_home_dir   = /tmp/mysqldata/node3innodb_log_group_home_dir = /tmp/mysqldata/node3tmpdir     = /tmp/mysqldata/node3log-error    = /tmp/mysqldata/node3/aiapple.loglog-bin     = /tmp/mysqldata/node3/mysql-bin.log

View Code

c) 使用mysqld_safe,及my3.cnf拉起实例

aiapple@aiapple:/tmp/mysqldata/node3$ /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/node3/my3.cnf &[2] 9861aiapple@aiapple:/tmp/mysqldata/node3$ 160806 22:03:17 mysqld_safe Logging to '/tmp/mysqldata/node3/aiapple.log'.160806 22:03:17 mysqld_safe Starting mysqld daemon with databases from /tmp/mysqldata/node3

d）查看

aiapple@aiapple:/tmp/mysqldata/node3$ ps -ef | grep mysqldaiapple  9121 8547 0 21:29 pts/2  00:00:00 /bin/sh /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnfaiapple  9489 9121 0 21:29 pts/2  00:00:02 /usr/local/mysql56/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node1 --plugin-dir=/usr/local/mysql56/lib/plugin --log-error=/tmp/mysqldata/node1/aiapple.log --pid-file=/tmp/mysqldata/node1/mysqld.pid --socket=/tmp/mysqldata/node1/mysql.sock --port=3306aiapple  9861 8547 0 22:03 pts/2  00:00:00 /bin/sh /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/node3/my3.cnfaiapple 10327 9861 0 22:03 pts/2  00:00:00 /usr/local/mysql56/bin/mysqld --defaults-file=/tmp/mysqldata/node3/my3.cnf --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node3 --plugin-dir=/usr/local/mysql56/lib/plugin --log-error=/tmp/mysqldata/node3/aiapple.log --pid-file=/tmp/mysqldata/node3/mysqld.pid --socket=/tmp/mysqldata/node3/mysql.sock --port=3308aiapple 10350 8547 0 22:04 pts/2  00:00:00 grep --color=auto mysqld 可以看到有两个端口的mysqld，分别是3306,3308；

e) 登陆新实例，删除test库，空用户，设置root密码

aiapple@aiapple:/tmp/mysqldata/node3$ mysql -uroot --socket=/tmp/mysqldata/node3/mysql.sockWelcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 1Server version: 5.6.32-log MySQL Community Server (GPL) Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. delete from msyql.user where user='';delete from mysql.user where host<>'localhost';set password for root@'localhost'=password('000000');delete from mysql.db;drop database test;flush privileges;

View Code

mysql线上安装小结