由于centos7开始，默认的数据库软件已经变为了mariadb，并且移除了mysql安装源，
rpm -qa | grep mariadb [lcr@localhost ~]$ rpm -qa | grep mariadb mariadb-5.5.52-1.el7.x86_64 mariadb-libs-5.5.52-1.el7.x86_64 mariadb-devel-5.5.52-1.el7.x86_64 mariadb-server-5.5.52-1.el7.x86_64 [root@localhost lcr]# yum remove mariadb-libs.x86_64
wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
##官方源可能速度太慢了，更换中科大镜像源 wget http://mirrors.ustc.edu.cn/mysql-repo/mysql57-community-release-el7-11.noarch.rpm
yum localinstall mysql57-community-release-el7-11.noarch.rpm
[root@localhost ~]# yum localinstall mysql57-community-release-el7-11.noarch.rpm
or ##[root@centOS lcr]# yum localinstall mysql57-community-release-el7-11.noarch.rpm
yum repolist enabled | grep "mysql.*-community.*"
[root@localhost ~]# yum repolist enabled | grep "mysql.*-community.*" mysql-connectors-community/x86_64 MySQL Connectors Community 42 mysql-tools-community/x86_64 MySQL Tools Community 51 mysql57-community/x86_64 MySQL 5.7 Community Server 207
vim /etc/yum.repos.d/mysql-community.repo
[root@localhost ~]# vim /etc/yum.repos.d/mysql-community.repo [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/$basearch/ enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql [mysql80-community] name=MySQL 8.0 Community Server baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/7/$basearch/ 选择要安装的community版本，将：enabled=0，改为enabled=1，其余改为enabled=0
yum install mysql-community-server
[root@localhost ~]# yum install mysql-community-server
rpm -qa |grep mysql
[root@centOS ~]# rpm -qa |grep mysql mysql-community-client-5.7.19-1.el7.x86_64 mysql57-community-release-el7-11.noarch mysql-community-server-5.7.19-1.el7.x86_64 mysql-community-common-5.7.19-1.el7.x86_64 mysql-community-libs-5.7.19-1.el7.x86_64
systemctl start mysqld
[root@localhost ~]# systemctl start mysqld
systemctl status mysqld
[root@localhost ~]# systemctl status mysqld ● mysqld.service - MySQL Community Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since 四 2017-08-31 14:31:18 CST; 29s ago Process: 14957 ExecStartPost=/usr/bin/mysql-systemd-start post (code=exited, status=0/SUCCESS) Process: 14936 ExecStartPre=/usr/bin/mysql-systemd-start pre (code=exited, status=0/SUCCESS) Main PID: 14955 (mysqld_safe) CGroup: /system.slice/mysqld.service ├─14955 /bin/sh /usr/bin/mysqld_safe --basedir=/usr └─15121 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir... 8月 31 14:31:15 localhost.localdomain systemd[1]: Starting MySQL Community Server... 8月 31 14:31:16 localhost.localdomain mysqld_safe[14955]: 170831 14:31:16 mysqld_safe .... 8月 31 14:31:16 localhost.localdomain mysqld_safe[14955]: 170831 14:31:16 mysqld_safe ...l 8月 31 14:31:18 localhost.localdomain systemd[1]: Started MySQL Community Server. Hint: Some lines were ellipsized, use -l to show in full.
[root@centOS ~]# systemctl enable mysqld [root@centOS ~]# systemctl daemon-reload
nano /var/log/mysqld.log
[root@centOS ~]# nano /var/log/mysqld.log 2017-08-31T11:00:12.326998Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2017-08-31T11:00:14.118974Z 0 [Warning] InnoDB: New log files created, LSN=45790 2017-08-31T11:00:14.210958Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2017-08-31T11:00:14.270194Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 90dced13-8e3b-11e7-a3f5-000c2$ 2017-08-31T11:00:14.271751Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2017-08-31T11:00:14.272562Z 1 [Note] A temporary password is generated for root@localhost: kl<T=kws0;3x 红色字体部分即为分配的初始化密码
mysql -uroot -p
[root@centOS log]# mysql -uroot -p Enter password: <------输入上面的初始化密码 Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.7.19 Copyright (c) 2000, 2017, 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. mysql> set password for 'root'@'localhost'=password('775120Zhxxxxxx'); ERROR 1819 (HY000): Your password does not satisfy the current policy requirements (5.7版本开始的mysql，增加了密码强度检测模块，要求密码包含数字，大小写字母，字符） mysql> set password for 'root'@'localhost'=password('775120@Zhxxxxxxx'); Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> exit Bye
mysql_secure_installation
[root@centOS ~]# mysql_secure_installation Securing the MySQL server deployment. Enter password for user root: The 'validate_password' plugin is installed on the server. The subsequent steps will run with the existing configuration of the plugin. Using existing password for root. Estimated strength of the password: 100 Change the password for root ? ((Press y|Y for Yes, any other key for No) : <--------是否修改密码 ... skipping. 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 <------------是否删除匿名账户 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) : y <----------禁止远程登录 Success. 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 <----------删除测试数据 - 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 <--------重新加载权限表 Success. All done! 至此，centos7下，mysql安装完毕
