centos7安装mysql和mysqlclient遇到的坑怎么解决

1. 添加mysql yum源

mysql官网>downloads>mysql yum repository找到合适版本的yum源

$wget https://dev.mysql.com/get/mysql80-community-release-el7-2.noarch.rpm
$sudo rpm -uvh mysql80-community-release-el7-2.noarch.rpm
 
#查看mysql数据库各个版本信息
$yum repolist all | grep mysql

2. 选择安装版本

修改/etc/yum.repos.d/mysql-community.repo 文件，选择mysql5.7版本

# enable to use mysql 5.6
[mysql56-community]
name=mysql 5.6 community server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/7/$basearch/
enabled=0 # 禁止
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/rpm-gpg-key-mysql
 
# enable to use mysql 5.7
[mysql57-community]
name=mysql 5.7 community server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
enabled=1 # 安装
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/rpm-gpg-key-mysql
 
[mysql80-community]
name=mysql 8.0 community server
baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/7/$basearch/
enabled=0 # 禁止
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/rpm-gpg-key-mysql

3. 安装

#执行以下命令安装mysql
yum install mysql-community-server
#启动mysql（centos7中）
systemctl start mysqld.service
#低版本的操作系统可用以下指令
service mysqld start
#查看mysql状态
systemctl status mysqld.service
#低版本操作系统可用以下指令
service mysqld status

4. 查看并修改密码

$grep "password" /var/log/mysqld.log
2019-04-11t08:17:16.706096z 1 [note] a temporary password is generated for root@localhost: ux#bkam(k1q-
$mysql -u root -p
>ux#bkam(k1q-
 
# 修改密码
mysql>alter user 'root'@'localhost' identified by 'complex password';
mysql>set global validate_password_policy=0;
mysql>set global validate_password_length=1;
mysql>alter user 'root'@'localhost' identified by 'simple password';

5. 配置开放3306端口

授权的方式允许任何主机访问mysql服务器：【一般采用这个即可，限制端口访问交由firewalld来做】

mysql>grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;

限定ip访问：

mysql>grant all privileges on *.* to 'jack'@'10.10.50.127' identified by 'password' with grant option;

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