Cenos7下安装Mysql8.0
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Cenos7下安装Mysql8.0
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centos的yum源中默认是没有mysql的，所以我们需要先去官网下载mysql的repo源并安装；
官网：http://dev.mysql.com/downloads/repo/yum/
设置repo源连接
#rpm -Uvh http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
显示所有的mysql版本及其状态
#yum repolist all | grep mysql
mysql-connectors-community/x86_64 MySQL Connectors Community 启用: 24
mysql-connectors-community-source MySQL Connectors Community - Sourc 禁用
mysql-tools-community/x86_64 MySQL Tools Community 启用: 38
mysql-tools-community-source MySQL Tools Community - Source 禁用
mysql-tools-preview/x86_64 MySQL Tools Preview 禁用
mysql-tools-preview-source MySQL Tools Preview - Source 禁用
mysql55-community/x86_64 MySQL 5.5 Community Server 禁用
mysql55-community-source MySQL 5.5 Community Server - Sourc 禁用
mysql56-community/x86_64 MySQL 5.6 Community Server 禁用
mysql56-community-source MySQL 5.6 Community Server - Sourc 禁用
mysql57-community/x86_64 MySQL 5.7 Community Server 启用: 267
mysql57-community-source MySQL 5.7 Community Server - Sourc 禁用
mysql80-community/x86_64 MySQL 8.0 Community Server 禁用
mysql80-community-source MySQL 8.0 Community Server - Sourc 禁用
这里显示的是5.7的包，修改源文件，禁用5.7，启用8.0
# vi /etc/yum.repos.d/mysql-community.repo
把8.0enabled改为1就可以了，其他的版本改为0
[mysql-connectors-community]
name=MySQL Connectors Community
baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql-tools-community]
name=MySQL Tools Community
baseurl=http://repo.mysql.com/yum/mysql-tools-community/el/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.5
[mysql55-community]
name=MySQL 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
# Enable to use MySQL 5.6
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql80-community]
name=MySQL 8.0 Community Server
baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql-tools-preview]
name=MySQL Tools Preview
baseurl=http://repo.mysql.com/yum/mysql-tools-preview/el/7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
修改完成之后查看可用的版本
#yum repolist enabled | grep mysql
mysql-connectors-community/x86_64 MySQL Connectors Community 24
mysql-tools-community/x86_64 MySQL Tools Community 38
mysql57-community/x86_64 MySQL 8.0 Community Server 146
如果看到8.0版本启用了之后就可以安装MySql了
#yum install -y mysql-community-server
过程会稍微有些慢，耐心等待，安装完成之后，就可以启动mysql了
#systemctl start mysqld
查看MySql的启动状态
#systemctl status mysqld
Redirecting to /bin/systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2018-05-11 23:34:51 CST; 11s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 12421 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 12661 (mysqld)
Status: "SERVER_OPERATING"
CGroup: /system.slice/mysqld.service
└─12661 /usr/sbin/mysqld
May 11 23:34:42 VM_0_7_centos systemd[1]: Starting MySQL Server...
May 11 23:34:51 VM_0_7_centos systemd[1]: Started MySQL Server.
开机启动设置
#systemctl enable mysqld
#systemctl daemon-reload
MySql安装完成之后会在LOG文件(/var/log/mysqld.log)中生成一个root的默认密码
2018-05-11T15:34:46.440387Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: hqm8r1xXy3登录MySql并修改root密码
#mysql -uroot -p
密码强度默认为中等，大小写字母、数字、特殊符号，只有修改成功后才能修改配置再设置更简单的密码
需要提前执行两个命令
mysql>set global validate_password.policy=0;
mysql>set global validate_password.length=1;
mysql>ALTER USER 'root'@'localhost' IDENTIFIED BY 'new psd';
参考链接：https://blog.csdn.net/su_xingyu/article/details/80287740?utm_source=copy