1、通過rpm包安裝
Centos系統中默認倉庫中攜帶了mysql數據庫，centos6 yum倉庫中mysql版本爲5.1,centos7中爲mariadb5.5（mysql的分支）,如果想安裝指定版本的mysql，可以去mysql官網下載。
（1）安裝前準備工作
# 安裝依賴軟件包
]# yum install net-tools perl
# 卸載centos中與mariadb相關的包
]# yum remove mariadb*
# 下載mysql及客戶端相關的 rpm包
]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-client-5.7.23-1.el7.x86_64.rpm
]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-server-5.7.23-1.el7.x86_64.rpm
]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-common-5.7.23-1.el7.x86_64.rpm
]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-libs-5.7.23-1.el7.x86_64.rpm
（2）安裝mysql
# 安裝mysql
]# rpm -ivh mysql-community-client-5.7.23-1.el7.x86_64.rpm mysql-community-server-5.7.23-1.el7.x86_64.rpm mysql-community-libs-5.7.23-1.el7.x86_64.rpm mysql-community-common-5.7.23-1.el7.x86_64.rpm
# 啓動mysql
]# systemctl start mysqld
（3）登錄mysql設置密碼
# 登錄mysql，mysql安裝完成後的默認密碼存放在日誌文件中（/var/log/mysqld.log）
]# grep password /var/log/mysqld.log
2018-09-03T15:29:11.472751Z 1 [Note] A temporary password is generated for root@localhost: <oTt/#hi!9gy
# 登錄mysql
]# mysql -uroot -p
Enter password:
# 由於mysql設置了一些安全策略密碼不能設置太簡單，同時不修改密碼不能做其他操作，先修改密碼策略
mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=4;
# 修改密碼
mysql> set password=password('dayi123');
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
2、cmake編譯安裝
（1）安裝環境準備
1）安裝所需依賴
]# yum -y install make gcc-c++ cmake bison-devel ncurses-devel perl ncurses-devel perl-Data-Dumperpython-devel openssl openssl-devel bzip2-devel python-devel
2）創建所需的用戶和組
]# useradd mysql –s /sbin/nologin
3）安裝bootst
# 下載解壓bootst
]# cd /usr/local
]# wget https://sourceforge.net/projects/boost/files/boost/1.59.0/boost_1_59_0.tar.gz
]# tar -xf boost_1_59_0.tar.gz
]# ln -s boost_1_59_0 boost
]# cd boost
# 編譯安裝boost
]# ./bootstrap.sh
]# ./b2
]# sudo ./b2 install
（2）下載安裝mysql數據庫
1）下載並解壓
]# wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.23.tar.gz
]# tar -xf mysql-5.7.23.tar.gz
2）編譯安裝mysql
# 進入mysql解壓目錄
]# cd mysql-5.7.23
#創建mysql數據存放目錄並授權
]# mkdir /data/mysql/data -p
]# chown mysql:mysql /data/mysql/ -R
# 編譯
]# cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql-5.7 -DMYSQL_DATADIR=/data/mysql/data/ -DDOWNLOAD_BOOST=1 -DWITH_BOOST=/usr/local/boost -DSYSCONFDIR=/etc/mysql -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_PARTITION_STORAGE_ENGINE=1 -DWITH_FEDERATED_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITH_MYISAM_STORAGE_ENGINE=1 -DENABLED_LOCAL_INFILE=1 -DENABLE_DTRACE=0 -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DEXTRA_CHARSETS=all -DWITH_EMBEDDED_SERVER=1 -DMYSQL_TCP_PORT=3306
# 安裝
]# make && make install
（3）設置mysql環境變量
# 創建mysql安裝目錄軟連接
]# ln -s /usr/local/mysql-5.7 /usr/local/mysql
# 添加mysql環境變量
]# echo "export PATH=/usr/local/mysql/bin:$PATH" >>/etc/profile
]# source /etc/profile
（4）初始化mysql
# 初始化mysql，在初始化時會創建mysql初始密碼
]# mysqld --initialize --datadir=/data/mysql/data/ --user=mysql --basedir=/usr/local/mysql/
2018-09-11T20:18:06.992549Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-09-11T20:18:07.708610Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-09-11T20:18:07.850613Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-09-11T20:18:07.943544Z 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: cc0c2024-b5ff-11e8-b3c7-000c298bc3a4.
2018-09-11T20:18:07.948015Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2018-09-11T20:18:07.953951Z 1 [Note] A temporary password is generated for root@localhost: ODD)w-Ald0lj
（5）配置mysql
Mysql初始配置如下
]# cat /etc/my.cnf
[client]
port=3306
socket=/tmp/mysql.sock
default-character-set=utf8
[mysqld]
basedir=/usr/local/mysql
datadir=/data/mysql/data
port=3306
socket =/tmp/mysql.sock
pid-file=/data/mysql/data/mysql.pid
[mysqld_safe]
log-error=/var/log/mysqld.log
#pid-file=/var/run/mysqld/mysqld.pid
pid-file=/data/mysql/data/mysql01.pid
（6）啓動mysql
# 創建mysql啓動文件
]# cp /usr/local/src/mysql-5.7.23/support-files/mysql.server /etc/init.d/mysqld
]# chkconfig --add mysqld
# 啓動mysql
]# /etc/init.d/mysqld start
Starting MySQL. SUCCESS!
（7）修改mysql初始密碼
# 登錄mysql，登錄時需要需要輸入初始化時獲得的密碼
]# mysql -uroot -p"ODD)w-Ald0lj"
#修改mysql登錄密碼
mysql> set password=password('dayi123');
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
（7）cmake編譯常用參數說明
-DCMAKE_INSTALL_PREFIX=”path”：指向mysql安裝目錄
-DINSTALL_SBINDIR=sbin：指定可執行文件目錄
-DMYSQL_DATADIR=”DATADIR”：指向mysql數據文件存放目錄
-DSYSCONFDIR=”confPATH”：指定mysql配置文件目錄
-DINSTALL_PLUGINDIR=”plugin-path”：指定插件存放目錄
-DINSTALL_MANDIR=share/man：指向man文檔目錄
-DINSTALL_SHAREDIR=share：指向aclocal/mysql.m4安裝目錄
-DINSTALL_LIBDIR=lib/mysql：指向對象代碼庫目錄
-DINSTALL_INCLUDEDIR=include/mysql：指向頭文件目錄
-DINSTALL_INFODIR=share/info：指向info文檔存放目錄（prefix/share/info）
-DWITH_READLINE=1：啓用readline庫支持（提供可編輯的命令行）
-DWITH_SSL=system：啓用ssl庫支持（安全套接層）
-DWITH_ZLIB=system：啓用libz庫支持（zib、gzib相關）
-DWITH_LIBWRAP=0：禁用libwrap庫（實現了通用TCP包裝的功能，爲網絡服務守護進程使用）
-DMYSQL_TCP_PORT=3306：指定TCP端口爲3306
-DMYSQL_UNIX_ADDR=/tmp/mysqld.sock：指定mysql.sock路徑
-DENABLED_LOCAL_INFILE=1：啓用本地數據導入支持
-DEXTRA_CHARSETS=all：啓用額外的字符集類型（默認爲all）
-DDEFAULT_CHARSET=utf8：指定默認的字符集爲utf8
-DDEFAULT_COLLATION=utf8_general_ci：設定默認排序規則（utf8_general_ci快速/utf8_unicode_ci準確）
-DWITH_EMBEDDED_SERVER=1：編譯嵌入式服務器支持
-DMYSQL_USER=mysql：指定mysql用戶(默認爲mysql)
-DWITH_DEBUG=0：禁用debug（默認爲禁用）
-DENABLE_PROFILING=0：禁用Profiling分析（默認爲開啓）
-DWITH_COMMENT='string'：一個關於編譯環境的描述性註釋
3、通過二進制包安裝（推薦安裝方法）
二進制包是mysql官方已經編譯好的mysql，下載後只需初始化就可以使用，初始化的方法同編譯安裝後初始化方法基本一致。
（1）安裝環境準備
1）創建程序運行的賬戶
]# useradd mysql -s /sbin/nologin
2）創建數據存放目錄並更改屬主爲mysql
]# mkdir /data/mysql/data -p
]# chown mysql:mysql /data/mysql/data/ -R
（2）安裝
1）下載二進制包
#下載二進制包解壓並拷貝至/usr/local/目錄下
]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz
]# tar -xf mysql-5.7.23-linux-glibc2.12-i686.tar.gz
]# mv mysql-5.7.23-linux-glibc2.12-i686 /usr/local/mysql-5.7.32
]# cd /usr/local/
# 創建軟連接並進入mysql目錄
]# ln -s mysql-5.7.32 mysql
]# cd mysql
2）創建mysql配置文件
]# cat /etc/my.cnf
[client]
port=3306
socket=/tmp/mysql.sock
default-character-set=utf8
[mysqld]
basedir=/usr/local/mysql
datadir=/data/mysql/data
port=3306
socket =/tmp/mysql.sock
pid-file=/data/mysql/data/mysql.pid
[mysqld_safe]
log-error=/var/log/mysqld.log
#pid-file=/var/run/mysqld/mysqld.pid
pid-file=/data/mysql/data/mysql01.pid
（3）初始化mysql
l]# bin/mysqld --initialize --datadir=/data/mysql/data/ --user=mysql --basedir=/usr/local/mysql/
2018-09-12T11:54:25.680958Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-09-12T11:54:26.262002Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-09-12T11:54:26.361054Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-09-12T11:54:26.420098Z 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: 99075ead-b682-11e8-a82f-000c290ae25c.
2018-09-12T11:54:26.421113Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2018-09-12T11:54:26.421999Z 1 [Note] A temporary password is generated for root@localhost: 73H139ippk#Z
（4）啓動mysql
# 將mysql bin目錄加入系統環境變量
]# echo "export PATH=/usr/local/mysql/bin:$PATH" >>/etc/profile
]# . /etc/profile
# 將mysql加入系統服務進行管理
]# cp /usr/local/mysql-5.7.32/support-files/mysql.server /etc/init.d/mysqld
]# chkconfig --add mysqld
#啓動mysql
l]# /etc/init.d/mysqld start
Starting MySQL. SUCCESS!
（5）修改mysql初始密碼
# 登錄mysql修改密碼，第一次登錄時需要使用初始化時獲得的密碼
]# mysql -uroot -p73H139ippk#Z
mysql> set password=password('dayi123');
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
4、mysql數據目錄說明
Mysql數據庫安裝完成後，在mysql數據目錄中會爲每一個庫創建一個目錄，其中，數據存放目錄下的Ibdata1和ib_logfile0、ib_logfile1三個文件專爲innodb存放數據和日誌的共享文件。