Ubuntu 22.04部署MySQL8.4

1、部署MySQL87.4

1.1、解压及安装

解压

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mkdir -p /opt/software/mysql
tar -xf mysql-server_8.4.8-1ubuntu22.04_amd64.deb-bundle.tar -C mysql

安装

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apt-get update
apt-get install libaio1
apt-get install libmecab2

dpkg -i mysql-common_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-community-client-plugins_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-community-client-core_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-community-client_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-client_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-community-server_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-community-server-core_8.4.8-1ubuntu22.04_amd64.deb 
dpkg -i mysql-server_8.4.8-1ubuntu22.04_amd64.deb 

systemctl status mysql
apt install -y net-tools
netstat -anp|grep 3306

2、修改配置

2.1、修改配置

vi /etc/my.cnf

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[mysqld]
# 基本设置
user=mysql
basedir=/usr
datadir=/data/mysql/data
socket=/var/lib/mysql/mysql.sock
pid-file=/var/run/mysqld/mysqld.pid

# 网络设置
port=3306
bind-address=0.0.0.0
skip-name-resolve

# 日志路径
log-error=/data/mysql/log/mysqld.log
slow_query_log=ON
slow_query_log_file=/data/mysql/log/slow.log
long_query_time=2

# 设置字符集
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci

# 设置默认存储引擎
default-storage-engine=INNODB

# 激活插件
mysql_native_password=ON

# 安全性
symbolic-links=0

#忽略大小写
# lower_case_table_names=1

# 资源调优（8C16G）
innodb_buffer_pool_size=10G
innodb_log_file_size=1G
innodb_log_buffer_size=64M
innodb_flush_log_at_trx_commit=1
sync_binlog=1
max_connections=5000
max_allowed_packet=64M
thread_cache_size=64
table_open_cache=4096

2.1、AppArmor 允许自定义目录

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cat >> /etc/apparmor.d/local/usr.sbin.mysqld << EOF
/data/mysql/ r,
/data/mysql/** rwk,
/var/lib/mysql/ r,
/var/lib/mysql/** rwk,
/var/run/mysqld/ r,
/var/run/mysqld/** rwk,
EOF

systemctl restart apparmor

2.2、初始化数据库

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mysqld --initialize --user=mysql --datadir=/data/mysql/data

2.3、启动MySQL

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systemctl restart mysql
systemctl enable mysql

3、基本操作

3.1、远程登录

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cat /data/mysql/log/mysqld.log |grep password

# 切换到系统库
use mysql;

# 重置 root 密码（强制用 mysql_native_password 插件，避免兼容问题）
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'Kylin.2026';
FLUSH PRIVILEGES;

# MySQL服务开通对外访问权限
CREATE USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'Kylin.2026';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;

# update mysql.user set host='%' where user='root';
# flush privileges;

3.2、建库并赋权

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CREATE DATABASE hive CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
CREATE USER 'hive'@'%' IDENTIFIED WITH mysql_native_password BY 'WishFox.2026';
GRANT ALL PRIVILEGES ON hive.* TO 'hive'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;

show variables like '%character%';