linux centos7安装mysql8

https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql80-community-el7/mysql-community-server-8.0.18-1.el7.x86_64.rpm

https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql80-community-el7/mysql-community-libs-8.0.18-1.el7.x86_64.rpm

https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql80-community-el7/mysql-community-common-8.0.18-1.el7.x86_64.rpm

https://mirrors.tuna.tsinghua.edu.cn/mysql/yum/mysql80-community-el7/mysql-community-client-8.0.18-1.el7.x86_64.rpm

到该网址下去寻找gcc、gcc-c++、openssl、perl及其依赖包
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/

修改Mysql默认的配置文件内容

sudo vi /etc/my.cnf
删除所有内容,加入以下内容:
[mysqld]
user=mysql
port=3306
datadir=/app/mysql/data
socket=/app/mysql/mysql.sock

log-error=/app/mysql/log/mysqld.log
pid-file=/app/mysql/mysqld.pid

[client]
socket=/app/mysql/mysql.sock

sudo mkdir /app/mysql/data /app/mysql/log -p

sudo chown mysql:mysql /app/mysql -R

查看Mysql的初始密码(root@localhost:后面的就是初始密码)

sudo cat /app/mysql/log |grep root@localhost (做过第4步使用该命令)
sudo cat /var/log/mysqld.log|grep root@localhost (未做过第4步使用该命令)

登录mysql,复制上面的密码
mysql -p 

alter user ‘root‘@‘localhost‘ identified by ‘你的密码‘;

https://mirrors.tuna.tsinghua.edu.cn/gnu/gcc/gcc-9.2.0/gcc-9.2.0.tar.gz
https://mirrors.tuna.tsinghua.edu.cn/gnu/gmp/gmp-6.2.0.tar.xz
https://mirrors.tuna.tsinghua.edu.cn/gnu/m4/m4-latest.tar.gz
https://mirrors.tuna.tsinghua.edu.cn/gnu/mpfr/mpfr-4.0.2.tar.gz
https://mirrors.tuna.tsinghua.edu.cn/gnu/mpc/mpc-1.1.0.tar.gz
https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-8.0/mysql-8.0.19.tar.gz
http://dl.bintray.com/boostorg/release/1.70.0/source/boost_1_70_0.tar.gz
https://down.24kplus.com/linux/cmake/cmake-3.16.2.tar.gz

到该网址下寻找gcc、gcc-c++及其依赖包(能连外网的可以直接使用命令:sudo yum -y install gcc gcc-c++)
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/

必须安装openssl和openssl-devel依赖,下载网址同上,否则bootstrap会报错:找不到openssl(能连外网的可以直接使用命令:sudo yum -y install openssl openssl-devel)

tar  cmake-3.16.1.tgz
cd  cmake-3.16.1
sudo ./bootstrap 
sudo make 
sudo make check
sudo make install

tar -xzvf m4-latest.tar.gz
cd m4-1.4.17/
sudo ./configure --prefix=/usr/local(--prefix指定安装路径)
sudo make  (编译)
sudo make check    (检查编译是否有错,注意是否有Error,可以不做)
sudo make install  (安装)

m4 --version (查看m4版本)

sudo ln -s /usr/local/bin/m4 /usr/bin (把m4做一个软连接到此路径下,否则configure时会报错:checking for suitable m4... configure: error: No usable m4 in $PATH or /usr/5bin (see config.log for reasons).)
tar -xvf gmp-6.2.0.tar.xz
cd gmp-6.2.0
sudo ./configure --prefix=/usr/local/gmp-6.2 (非管理员必须要sudo,否则会报错:Permission denied)
sudo make
sudo make check
sudo make install

tar -xzvf mpfr-4.0.2.tar.gz 
cd mpfr-4.0.2 
sudo ./configure --prefix=/usr/local/mpfr-4.0 --with-gmp=/usr/local/gmp-6.2   (--with-gmp为gmp的安装目录)
sudo make
sudo make check
sudo make install

tar -xzvf mpc-1.1.0.tar.gz
cd mpc-1.1
sudo ./configure --prefix=/usr/local/mpc-1.1  --with-gmp=/usr/local/gmp-6.2 --with-mpfr=/usr/local/mpfr-4.0
sudo make
sduo make check
sudo make install

sudo vi /etc/ld.so.conf
   /usr/local/mpfr-4.0/lib/

   /usr/local/gmp-6.2/lib

   /usr/local/mpc-1.1/lib

sudo ldconfig (使上面的操作生效)

或者做软连接

sudo ln -s /usr/local/mpfr-4.0/lib/libmpfr.so.6 /usr/bin

或者复制

sudo cp /usr/local/mpfr-4.0/lib/libmpfr.so.6 /usr/bin/

下载gmp-devel和libmpc-devel及其依赖包(能连外网的可以直接使用命令:sudo yum -y install gmp-devel libmpc-devel)
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/gmp-6.0.0-15.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/gmp-devel-6.0.0-15.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/libmpc-1.0.1-3.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/libmpc-devel-1.0.1-3.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/mpfr-3.1.1-4.el7.x86_64.rpm
https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/x86_64/Packages/mpfr-devel-3.1.1-4.el7.x86_64.rpm

若还有依赖包需下载，请到https://mirrors.tuna.tsinghua.edu.cn自行下载

tar -xzvf  gcc-9.2.0.tar.gz
cd gcc-9.2.0

  sudo ./configure --prefix=/usr/local/gcc-9.2 \
  --enable-bootstrap\
  --enable-checking=release \
  --enable-languages=c,c++ \
  --enable-threads=posix \
  --disable-checking\
  --disable-multilib\
  --enable--long-long\
  --with-gmp=/usr/local/gmp-6.2\
  --with-mpfr=/usr/local/mpfr-4.0\
  --with-mpc=/usr/local/mpc-1.1

sudo make (编译时间较长,1个小时的样子)
sudo make check
sudo make install

务必卸载低版本的gcc、gcc-c++
sudo rpm -e gcc-c++
sudo rpm -e gcc

sudo vi /etc/profile export PATH=$PATH:/usr/local/gcc/bin 

　　source /etc/profile

查看gcc版本号
gcc --version 

安装ncurses-devel依赖,否则cmake报错:Curses library not found.Please install appropriate package(能连外网的可以直接使用命令:sudo yum -y install ncurses-devel,不能连上外网的下载地址同第2步一样)

tar -xzvf mysql-8.0.19.tar.gz
cd mysql-8.0.19

cmake . -DCMAKE_INSTALL_PREFIX=/app/mysql\
 -DDEFAULT_CHARSET=utf8\
 -DDEFAULT_COLLATION=utf8_general_ci\
 -DENABLED_LOCAL_INFILE=ON\
 -DWITH_SSL=system\
 -DMYSQL_DATADIR=/app/mysql/data\
 -DSYSCONFDIR=/app/mysql/config\
 -DMYSQL_TCP_PORT=3306\
 -DMYSQL_UNIX_ADDR=/app/mysql/mysql.sock\
 -DWITH_BOOST=/home/mcbadm/mysql8/\
 -DFORCE_INSOURCE_BUILD=1

以上参数介绍如下(简单的参数,更详细参数请参考https://blog.51cto.com/laowafang/1294964):
-DCMAKE_INSTALL_PREFIX:安装目录
-DDEFAULT_CHARSET:设置字符集
-DDEFAULT_COLLATION:设置排序规则
-DENABLED_LOCAL_INFILE=ON:启用本地数据导入支持
-DWITH_SSL=system:启用ssl库支持
-DMYSQL_DATADIR:数据文件目录,可任意   
-DSYSCONFDIR:配置文件目录,可任意 
-DMYSQL_TCP_PORT:mysql监听的TCP端口
-DMYSQL_UNIX_ADDR:mysql.sock路径,可任意 
-DWITH_BOOST:boost源码包所在目录 
-DFORCE_INSOURCE_BUILD:强制建立未存在的资源目录

cmake若报错,请找到原因解决后删除CMakeCache.txt再次cmake

sudo rm -rf /usr/lib64/libstdc++.so.6* (删掉所有低版本c++的库文件)
sudo ln -s /usr/local/gcc-9.2/lib64 /usr/lib64  (把新安装的高本版c++库文件加入到系统库文件中)
sudo make   (需要大概1小时)
sudo make install

sudo mkdir /app/mysql/config
sudo cd /app/mysql

sudo vi config/my.cnf
加入以下内容:
[mysqld]
user=mysql
port=3306
datadir=/app/mysql/data
socket=/app/mysql/mysql.sock

[mysqld_safe]
log-error=/app/mysql/logs/mysql-err.log
pid-file=/app/mysql/mysql.pid

[client]
socket=/app/mysql/mysql.sock

sudo useradd mysql -s /sbin/nologin

sudo mkdir -p  /app/mysql/logs

sudo touch /app/mysql/logs/mysql-err.log

sudo chown -R mysql.mysql /app/mysql

初始化
sudo /app/mysql/bin/mysqld --initialize-insecure  --user=mysql --datadir=/app/mysql/data --basedir=/app/mysql     (无初始密码的，若想要初始密码，使用--initialize)

启动
sudo /app/mysql/support-files/mysql.server start

登陆(若无初始密码直接回车即可)
sudo /app/mysql/bin/mysql -p

修改密码
alter user ‘root‘@‘localhost‘ identified by ‘密码‘;