CentOS7默认安装了和MySQL有兼容性的MariaDB数据库，在我们安装MySQL5.7之前为了避免发生冲突首先删除MariaDB。
# rpm -qa | grep maria
yum remove mariadb-libs -y
二、安装环境
yum -y install make cmake bison-devel ncurses-devel gcc gcc-c++ kernel-devel &&\
yum install -y readline-devel pcre-devel openssl-devel openssl zlib zlib-devel pcre-devel perl perl-devel wget
三、下载boost，一定要是1_59_0
wget -c https://dl.bintray.com/boostorg/release/1.59.0/source/boost_1_59_0.tar.gz
tar -xzvf boost_1_59_0.tar.gz
cp boost_1_59_0 /usr/local/
四、安装mysql
wget -c https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.22.tar.gz &&\
tar -zxvf mysql-5.7.22.tar.gz && rm -f mysql-5.7.22.tar.gz && cd mysql-5.7.22
cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/var/lib/mysql -DSYSCONFDIR=/etc -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_ARCHIVE_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITH_FEDERATED_STORAGE_ENGINE=1 -DWITH_PARTITION_STORAGE_ENGINE=1 -DMYSQL_UNIX_ADDR=/tmp/mysqld.sock -DENABLED_LOCAL_INFILE=1 -DWITH_EXTRA_CHARSETS=all -DMYSQL_USER=mysql -DDOWNLOAD_BOOST=1 -DWITH_BOOST=/usr/local/boost_1_59_0
gmake && make install
五、安装之后的一些配置：
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
mkdir /var/lib/mysql
chown mysql. mysql
vi /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql
datadir = /var/lib/mysql
port = 3306
socket = /tmp/mysqld.sock
mysql_install_db 被废弃了，取而代之的是 mysqld –initialize
# /usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --initialize --datadir=/var/lib/mysql --basedir=/usr/local/mysql --user=mysql
# systemctl start mysql
# ps -ef|grep mysql
# vi ~/.bash_profile
PATH=$PATH:$HOME/bin:/usr/local/mysql/bin
ln -s /usr/local/mysql/bin/mysql /usr/bin
# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
配置文件中添加如下一行，跳过密码验证
# cat /etc/my.cnf
[mysqld]
skip-grant_tables
重启MySQL
# systemctl restart mysql
# mysql
mysql> update mysql.user set authentication_string=password('Oracle') where user='root' ;
再次重启MySQL
# systemctl restart mysql
# mysql
mysql> show databases;