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servers:mysql

Information

Prerequisites

Repository

sudo dnf install 'https://dev.mysql.com/get/mysql80-community-release-fc29-2.noarch.rpm'

5.7

  • Disables the latest GA repo and enables the 5.7 repo
  • This is necessary for TrinityCore
sudo dnf repolist all | grep 'mysql'
sudo dnf config-manager --disable 'mysql80-community'
sudo dnf config-manager --enable 'mysql57-community' && sudo dnf repolist enabled | grep 'mysql'

Dependencies

sudo dnf install 'mysql-community-server'

Settings

Initial

echo '!includedir /etc/my.cnf.d' | sudo tee --append '/etc/my.cnf' > '/dev/null'

Settings

  • :!: The empty sql-mode setting is intentional 2)
sudo mkdir -p '/etc/my.cnf.d' && sudo -e '/etc/my.cnf.d/custom.cnf'
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
expire_logs_days = 7
max_binlog_size = 100M
skip-networking = On
sql-mode = 

Verify

mysqladmin variables -u 'root' -p | egrep 'utf8|networking|socket'

Initial Setup

Service

sudo systemctl enable 'mysqld' --now

Get Temporary Password

cat '/var/log/mysqld.log' | grep 'temporary password'

Setup

mysql_secure_installation

Database Repair and Optimization

Create MySQL User

mysql -u 'root' -p
GRANT SELECT, INSERT ON *.* to 'maintenance'@'localhost' IDENTIFIED BY 'x';
FLUSH PRIVILEGES;

Authentication File

sudo -u 'mysql' mkdir -p '/var/lib/mysql/auth' && sudo -u 'mysql' -e '/var/lib/mysql/auth/maintenance' && sudo chmod '600' '/var/lib/mysql/auth/maintenance'
[mysqlcheck]
user=maintenance
password=x

Service

sudo -e '/etc/systemd/system/db-m.service'
[Service]
User=mysql
Group=mysql
Type=oneshot
ExecStart='/usr/bin/mysqlcheck' --defaults-extra-file='/var/lib/mysql/auth/maintenance' --auto-repair --optimize --all-databases --force
ExecStartPost='/usr/bin/sync'

Timer

sudo -e '/etc/systemd/system/db-m.timer' && sudo systemctl daemon-reload && sudo systemctl enable 'db-m.timer' --now && sudo systemctl start 'db-m' && sudo systemctl status 'db-m' -l
[Unit]
Description=MySQL Database Check, Repair, and Optimization
After=mysqld.service

[Timer]
OnCalendar=weekly
Persistent=true

[Install]
WantedBy=timers.target

Notable Commands

Show Users on Server

select User,Host from mysql.user;

Show Data Folder Location

select @@datadir;

Socket File

/var/lib/mysql/mysql.sock

Log

/var/log/mysqld.log

Reset

sudo systemctl stop 'mysqld'
sudo rm -Rf '/etc/my.cnf'* '/var/lib/mysql'* '/var/log/mysqld.log' && sync
sudo dnf reinstall 'mysql-community-server'

Password Validation

cnf

validate_password_policy=LOW

Query

mysql -u 'root' -p
SHOW VARIABLES LIKE 'validate_password%';

Configure

  • Default policy is MEDIUM
mysql -u 'root' -p
SET GLOBAL validate_password_policy=LOW;

Disable

mysql -u 'root' -p
UNINSTALL PLUGIN validate_password;

Enable

mysql -u 'root' -p
INSTALL PLUGIN validate_password SONAME 'validate_password.so';
2)
this disables strict mode
servers/mysql.txt · Last modified: 2019/02/13 22:07 by Sean Rhone