Linux Mysql-8.0.23 installation and configuration

Mysql operation and maintenance notes

The official version of MySQL 8 8.0.11 has been released. The official said that MySQL 8 is 2 times faster than MySQL 5.7, and it also brings a lot of improvements and faster performance!

Before Mysql 5.7, utf8 was used, after 8.0, the default encoding was used to use utf8mb4, utf8mb4 is more complete, including utf8

Server initialization

#Adjust swap

echo 0 > /proc/sys/vm/swappiness

vim /etc/sysctl.conf

vm.swappiness = 0

#Installation package

yum install -y cmake gcc gcc-c++ ncurses ncurses-devel bison zlib zlib-devel libxml openssl openssl-devel automake autoconf make libtool bison-devel libaio-devel

#Create user

useradd -s /sbin/nologin mysql

Unzip the file after downloading

#下载
cd /opt

wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.23-linux-glibc2.12-x86_64.tar.xz

# 解压分两步
xz -d mysql-8.0.23-linux-glibc2.12-x86_64.tar.xz 
tar xf mysql-8.0.23-linux-glibc2.12-x86_64.tar 

mv mysql-8.0.23-linux-glibc2.12-x86_64 /usr/local/mysql

System Configuration

#MysqlFile Directory

cd /usr/local/
chown -R mysql. mysql

#Data Directory

mkdir -p /data/mysql/3306/data /data/mysql/3306/binlog

chown -R mysql. /data/mysql

#Modify environment variables

vim /etc/profile.d/mysql.sh
export PATH=/usr/local/mysql/bin:$PATH
source /etc/profile.d/mysql.sh

Start with system association

vim /etc/systemd/system/mysqld.service
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql/bin/mysqld --defaults-file=/data/mysql/3306/my.cnf
LimitNOFILE = 5000

systemctl daemon-reload
systemctl enable mysqld

Mysql configuration file

cat my.cnf
[client]
port = 3306
socket = /data/mysql/3306/mysql.sock

[mysqld]
basedir = /usr/local/mysql
datadir = /data/mysql/3306/data
port = 3306
socket = /data/mysql/3306/mysql.sock
log-error = /data/mysql/3306/mysql_error.log
pid-file = /data/mysql/3306/mysql.pid
log-bin = /data/mysql/3306/binlog/binlog

skip-host-cache
skip-name-resolve
# Independent table space
innodb_file_per_table = 1
# Memory pool
innodb_buffer_pool_size = 2G
innodb_flush_log_at_trx_commit = 1

innodb_flush_method=O_DIRECT

[mysqld_safe]

Initialize the database

mysqld --defaults-file=/data/mysql/3306/my.cnf --initialize --user=mysql

#There will be a password in the log

grep "password" /data/mysql/3306/mysql_error.log

C9O3+1&c671S

#Start the database

systemctl start mysqld

Mysql basic operation

#第一次登陆需要修改密码
mysql -uroot -p -S mysql.sock
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

mysql> alter user root@'localhost' identified by '123456';
Query OK, 0 rows affected (0.01 sec)

# 创建用户 5.6/5.7 中直接grant 带账号以及授权已无法使用
mysql> create user root@'10.10.10.%' identified by '123456';
mysql> grant all on *.* to  root@'10.10.10.%';

#连接数据库
mysql -uroot -p -S mysql.sock
mysql -uroot -p -hxxx -Pxxx

Linux Mysql-8.0.23 installation and configuration

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