centos7安装mysql8压缩包_centos7 mysql8解压版安装
OS：centos 7.3,7.6 64 bit
mem:8G,16g
mysql:mysql-8.0.20-el7-x86_64.tar.gz
安装前请将/etc/selinux/config 改为disabled，否则初始化会报权限的问题
安装之产前的提示:
1、MYSQL表名对大小写敏感，对字段不敏感，并且解压版不像安装版那样，在初始化数据库之前，在my.cnf中
配制lower_case_table_names=1就可以让mysql对表名大小不写敏感。
2、MYSQL的root账号，不能远程登陆了，改成%都没用，不过可以新建一个具有root账号权限的用户来实现管理MYSQL。
3、MYSQL的授权方式变动了，同MYSQL5的变化很大。原来MYSQL5的授权方式失效了。
4、MYSQL的my.cnf中配制default_authentication_plugin=mysql_native_password 否则登录提示caching_sha2_password。
1、解压mysql
tar -xvf mysql-8.0.20-el7-x86_64.tar.gz
2、创建MYSQL用户及组(如果没有安全性要求的话，可以直接使用root用户，省掉很多授权的操作)
groupadd mysql
useradd -s /sbin/nologin -r -g mysql mysql
3、创建数据目录和日志目录
cd /home/software/mysql8
mkdir data
mkdir logs
4、授权mysql用户权限
chgrp -R mysql mysql8/
chown -R mysql mysql8/
chown -R mysql:mysql /home/software/mysql8/data
chown -R mysql:mysql /home/software/mysql8/logs
5、进行数据库初始化
如果之前执行过初化了，可以把对应的data目录内容清掉，再执行如下的语句
cd mysql8/bin
./mysqld --initialize --lower-case-table-names=1 --basedir=/home/software/mysql8/ --datadir=/home/software/mysql8/data/ --user=root //root用户权限大，不用授各种文件权限了
如果是CENTOS是英语环境
请使用
./mysqld --initialize --lower-case-table-names=1 --datadir=/root/home/mysql8/data --user=mysql
即不指定basedir 否则会报错
备注：这里的--lower-case-table-names=1 表示查询的时候呼略大小写,同时在my.cny中也配制配制这一项，否则会报错。
//如果出现下面的这样的提示
error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory
//那么使用以下命令进行处理
yum remove libnuma.so.1
//记录以下的密码,如果密码现出现>或
//如果密码出现特殊字符：&，$,\等，那需要用\转义
2020-05-21T01:37:57.020274Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
2020-05-21T01:37:57.020388Z 0 [System] [MY-013169] [Server] /home/software/mysql8/bin/mysqld (mysqld 8.0.20) initializing of server in progress as process 28465
2020-05-21T01:37:57.029134Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2020-05-21T01:37:57.720958Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2020-05-21T01:37:59.679346Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: FZkhCmsqA8&_
5、配制mysql
vi /etc/my.cnf
[client]
default-character-set=utf8
socket=/home/software/mysql8/data/mysql.sock
[mysqld]
lower-case-table-names=1
bind-address=172.16.6.36
basedir=/home/software/mysql8
datadir=/home/software/mysql8/data
socket=/home/software/mysql8/data/mysql.sock
max_connections = 1000
innodb_buffer_pool_size=2048M
default_authentication_plugin=mysql_native_password
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd
[mysqld_safe]
log-error=/home/software/mysql8/logs/log-error.log
pid-file=/home/software/mysql8/logs/mysql_pid.log
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d
6、建立错误日志
cd /home/software/mysql8/logs
vi log-error.log
7、配制mysql服务
cd /home/software/mysql8/support-files
vi mysql.server
basedir=/home/software/mysql8
datadir=/home/software/mysql8/data
cp mysql.server /etc/init.d/
mv mysql.server mysqld
vi mysqld
basedir=/home/mysql8/
datadir=/home/mysql8/data/
###########指定my.cnf位置，以及用root用户启动(root用户权限大，不用授各种文件权限了)
$bindir/mysqld_safe --defaults-file=/etc/my.cnf --datadir="$datadir" --user=root --pid-file="$mysqld_pid_file_path" $other_args >/dev/null &
chkconfig --add mysqld
chkconfig mysqld on
8、添加防火墙
vi /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
9、启动mysql
service mysqld start
10、添加环境变量
vi /etc/profile
unset -f pathmunge
export JAVA_HOME=/home/jdk1.8.0_231
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export MYSQL_HOME=/home/software/mysql8
export PATH=${JAVA_HOME}/bin/:${MYSQL_HOME}/bin/:$PATH
source /etc/profile
11.更改mysql的root密码
mysql -uroot -p
输入FZkhCmsqA8\&_
alter user user() identified by 'xxxxxx';
//以下方式无效
#alter user'root'@'%localhost' IDENTIFIED BY 'ypABC@123';
12、创建远程可以访问的root_remote
CREATE USER 'root_remote'@'%' IDENTIFIED BY 'xxxxxx';
grant all privileges on *.* to 'root_remote'@'%'
注意：本文归作者所有，未经作者允许，不得转载