centos7系统安装mysql8脚本(20200617)

Posted 2021-04-06 健学精律

#!/bin/bash

#centos7系统安装mysql8脚本(20200617)

# 1.清理自带数据库

systemctl stop mariadb

yum remove -y mariadb*

mv /etc/my.cnf /etc/my.cnf.old

rm -rf /var/lib/mysql*

# 2.安装可能需要依赖包

# wget http://mirrors.aliyun.com/repo/Centos-7.repo -O /etc/yum.repos.d/Centos-7.repo

# wget http://mirrors.aliyun.com/repo/epel-7.repo -O /etc/yum.repos.d/epel-7.repo

yum -y install perl-Data-Dumper perl-JSON perl-Time-HiRes libaio openssl-devel

# 3.下载捆绑全包并解压,使用升级方式安装 

wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar

echo > /var/log/mysqld.log  #先清空以前日志

chmod 666 /var/log/mysqld.log

tar -axf mysql-8.0.*.rpm-bundle.tar

rpm -Uvh mysql-community-*.rpm

\cp /etc/my.cnf /etc/my.cnf.bak

# 4.启动服务并修改初始密码

systemctl restart mysqld && systemctl status mysqld && TMPASS=`awk '/temporary password/{print $NF}' /var/log/mysqld.log` && mysqladmin --user=root --password=$TMPASS password "Tempass@1" >/dev/null #修改临时密码为Tempass@1,符合强密码四分之三原则

# 5.根据业务需要修改配置文件

cat > /etc/my.cnf << \EOF

# for mysql8.0

[mysqld_safe]

log-error=/var/log/mysqld.log 

[client]

default-character-set=utf8mb4

socket = /var/lib/mysql/mysql.sock

[mysql]

default-character-set=utf8mb4

[mysqld]

bind-address=0.0.0.0 

explicit_defaults_for_timestamp=true

character-set-server=utf8mb4

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

max_connections = 65535

wait_timeout = 1800

interactive_timeout = 1800

thread_cache_size = 400

max_connect_errors = 200

slow_query_log = ON

slow_query_log_file=mysql_slow.log

max_allowed_packet = 500M

default-storage-engine=INNODB

validate_password.policy=0

validate_password.length=6

default_authentication_plugin=mysql_native_password

expire_logs_days = 7 

log_bin_trust_function_creators = 1

server_id=1

log-bin=host1-binlog

binlog_format="mixed"

relay_log_purge=off

lower_case_table_names=1

skip_symbolic_links=yes 

local-infile=0 

EOF

systemctl restart mysqld;systemctl status mysqld 

echo '临时密码为"Tempass@1" ,不含双引号,请注意修改'

#CREATE USER 'root'@'%' IDENTIFIED WITH mysql_native_password  BY 'Tempass@2'  && GRANT ALL PRIVILEGES  ON *.* TO 'root'@'%' WITH GRANT OPTION ;