centos7安装mysql8.0.33-1.el7.x86_64.rpm-bundle教程
每次安装数据库都到处找帖子，找原来的笔记，把自己的安装过程记录下来，方便自己查看及童鞋们学习。
mysql下载
下载地址：
MySQL :: Download MySQL Community Server (Archived Versions)
1、修改句柄数，文件最后增加
vim /etc/security/limits.conf
* soft nofile 102400
* hard nofile 102400
* soft nproc 65535
* hard nproc 65535
* hard memlock 2048
* soft memlock 2048 2、修改权限、关闭防火墙
vim /etc/selinux/config
修改中SELINUX=enforcing 已经修改为 SELINUX=permissive
vim替换命令
:%s/SELINUX=enforcing/SELINUX=permissive/g关闭防火墙：
systemctl stop firewalld.service
systemctl disable firewalld.service
systemctl status firewalld.service
3、centos安装
yum install -y gcc cc gcc-c++
也可以把常用的都安装一下
yum install -y gcc gcc-c++ vim zip unzip net-tools lrzsz wget 最好重启一下
reboot
4、安装新版mysql之前，我们需要将系统自带的mariadb-lib卸载
查看：rpm -qa | grep -i mariadb
mariadb-libs-5.5.52-1.el7.x86_64
卸载：rpm -e --nodeps mariadb-libs-5.5.56-2.el7.x86_64
再查看，没有了就是卸载成功：rpm -qa | grep -i mariadb
5、创建mysql用户
groupadd mysql
useradd -g mysql -m mysql -s /bin/false6、上传mysql-8.0.33-1.el7.x86_64.rpm-bundle.tar并解压
解压：
tar -xvf mysql-8.0.33-1.el7.x86_64.rpm-bundle.tar
安装：
rpm -ivh mysql-community-common-8.0.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-plugins-8.0.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-icu-data-files-8.0.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.33-1.el7.x86_64.rpm7、创建安装目录及权限
mkdir -p /data/mysql/data
chown mysql:mysql /data/mysql/
chown mysql:mysql /data/mysql/data
chmod 777 -R /data/mysql/
chmod -R 777 /var/run/mysqld8、编辑配置文件
vi /etc/my.cnf 删除原来的内容，直接拷贝以下内容：
[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_bin
init_connect='SET NAMES utf8mb4'
datadir=/data/mysql/data
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
server-id=1
default-time-zone='+08:00'
lower_case_table_names=1
transaction_isolation=READ-COMMITTED
skip-name-resolve
expire_logs_days=3
max_connections = 1250
max_user_connections=1000
max_connect_errors=100000
key_buffer_size = 256M
max_allowed_packet = 16M
table_open_cache = 512
log-bin=mysql-bin
binlog_format = ROW
slow-query-log=1
long_query_time =1
slow-query-log-file=/data/mysql/mysqld-slow.log
#log-queries-not-using-indexes
join_buffer_size = 1M
read_buffer_size = 4M
read_rnd_buffer_size = 8M
innodb_buffer_pool_size = 2G
innodb_autoextend_increment = 64M
innodb_log_buffer_size = 8M
innodb_log_file_size = 512M
innodb_log_files_in_group = 3
innodb_flush_log_at_trx_commit = 1
innodb_max_dirty_pages_pct = 70
innodb_flush_method = O_DIRECT
9、-数据库初始化
mysqld --initialize --console --user=mysql10、启动并修改默认密码
启动：
service mysqld start
查看初始化的随机密码：
grep 'temporary password' /var/log/mysqld.log
登录mysql，输入上面查看到的随机密码：
mysql -u root -p
修改本地密码：
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
mysql> flush privileges;11、如果需要其他机器远程访问，创建用户并赋权限：
mysql> create user root@'%' identified by '123456';
mysql> grant all privileges on *.* to root@'%' with grant option;
-- 5.7
mysql> grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;
-- 8.0
mysql> alter user 'root'@'%' identified with mysql_native_password by '123456';
mysql> flush privileges;