数据库相关--在mac OX10.11.6上安装MySQL

一、之前失败情况

　　官网下载dmg文件安装、源码安装，下过5.6  5.7  8.0 版本，都可以安装成功，但是在电脑设置界面无法启动，每次点启动输入密码后，均闪一下绿色然后变红色，既然不能界面启动，那就使用终端试试，结果就是长时间的不停解决各种问题：不能连接到数据库的服务啦、找不到mysql.sock文件啦、PID错误啊等等等等，看过网上各种方式：kill已有mysql进程、新建/修改my.cnf文件、修改配置路径等等等等，数据库也是不断卸载、安装，均已失败告终。

二、完全卸载mysql

　　在安装之前，一定要完全卸载mysql，并删除相关的各种文件，依次运行以下语句：（如果不是root用户需要在前面加上sudo，也可使用sudo su -进行root）

mymac:~ root# rm -rf /usr/local/mysql*
mymac:~ root# rm -rf /Library/StartupItems/MySQLCOM
mymac:~ root# rm -rf /Library/PreferencePanes/My*  
mymac:~ root# rm -rf ~/Library/PreferencePanes/My*
mymac:~ root# rm -rf /Library/Receipts/mysql*
mymac:~ root# rm -rf /Library/Receipts/MySQL* 
mymac:~ root# rm -rf /var/db/receipts/com.mysql.*  

三、使用brew安装

　　安装brew并更新：（可参考官网：https://brew.sh/）

mymac:~ root# /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
mymac:~ root# brew update

　　安装mysql：

不能使用root用户安装，会报错：

 

mymac:~ mymac$ brew install mysql
Updating Homebrew...
==> Downloading https://homebrew.bintray.com/bottles/mysql-5.7.22.el_capitan.bot
Already downloaded: /Users/mymac/Library/Caches/Homebrew/mysql-5.7.22.el_capitan.bottle.tar.gz
==> Pouring mysql-5.7.22.el_capitan.bottle.tar.gz
==> Caveats
We've installed your MySQL database without a root password. To secure it run:

    mysql_secure_installation

MySQL is configured to only allow connections from localhost by default

To connect run:

    mysql -uroot

To have launchd start mysql now and restart at login:
  brew services start mysql
Or, if you don't want/need a background service you can just run:
  mysql.server start
==> Summary
🍺  /usr/local/Cellar/mysql/5.7.22: 317 files, 235MB

 

启动mysql服务：

mymac:~ mymac$ mysql.server start
Starting MySQL
 SUCCESS! 

 

启动mysql配置：

mymac:~ mymac$ mysql_secure_installation

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords and improve security. It checks the strength of password and allows the users to set only those passwords which are secure enough.
Would you like to setup VALIDATE PASSWORD plugin?

Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:
LOW Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 1
# 密码强度设置，最简单的输入0，中等输入1，复杂输入2

Please set the password for root here.

New password: 

Re-enter new password: 

Estimated strength of the password: 100 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.
Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.

Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : no

 ... skipping.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.

Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
 - Dropping test database...
Success.
 - Removing privileges on test database...
Success.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.

All done! 

 

登录mysql：

mymac:~ mymac$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 93
Server version: 5.7.22 Homebrew

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