Mysql8.0

0. 概述

我之前写过一篇博客，https://www.cnblogs.com/ddzj01/p/10678296.html ，讲述了mysql5.7如何一键安装在centos6上面。现在公司开始采用centos7 + mysql8.0的架构，由于mysql8.0的参数设置有变化，因此重新写一篇博客记录下。
 

1. 准备mysql的安装包

mysql的安装包下载地址：https://dev.mysql.com/downloads/mysql/
注意需要下载的是linux - Generic版本 64bit，文件名类似于：(mysql-8.0.22-linux-glibc2.12-x86_64.tar.xz)
 

2. 准备install.sh

这个安装脚本对比老的版本，它能更清晰的反映脚本执行到哪一步了，而且安装前会对系统进行预检，如果发现不适合安装，会有很显眼的错误提示。

#!/bin/sh
# author: yang bao
# time: 2021-02-09 
# note: this script is used to install mysql8.0 on centos7.
# 1. at first, you should prepare mysql install binary package like 'mysql-8.0.22-linux-glibc2.12-x86_64.tar.xz' 
# and install.sh and my.cnf under same directory such as /root.
# 2. then exec 'sh install.sh' and see the output.

# log function, 0 = pass, 1 = fail
log() {
    if [ $1 -eq 0 ]; then
        echo " --> PASS"
    elif [ $1 -eq 1 ]; then
        echo -e "33[1;41;33m --> FAIL 33[0m"   
        echo -e "33[1;41;33m $2 33[0m"
        exit 1
    fi
}

# prepare mysql related file
echo "[1] start to check mysql related file --> PASS"

echo -n "[1.1] check if there is mysql install binary package"
cnt1=`find . -maxdepth 1 -name 'mysql-*-linux-glibc2.12-x86_64.tar.xz' -type f | wc -l`
if [ $cnt1 -lt 1 ]; then
    log 1 "It seems there isn't mysql install binary package in current directory!"
elif [ $cnt1 -gt 1 ]; then
    log 1 "It seems there are too many mysql install binary packages in current directory,
    please just keep one, rename or move the others!"
else
    log 0
fi

echo -n "[1.2] check if there is my.cnf in current directory"
cnt2=`find . -maxdepth 1 -name 'my.cnf' -type f | wc -l`
if [ $cnt2 -lt 1 ]; then
    log 1 "It seems there isn't my.cnf in current directory!"
else 
    log 0
fi

echo -n "[1.3] check if there is my.cnf in /etc"
cnt3=`find /etc -maxdepth 1 -name 'my.cnf' -type f | wc -l`
if [ $cnt3 -eq 1 ]; then
    log 1 "It seems there is my.cnf in /etc already, please delete it first!"
else 
    log 0
fi

echo -n "[1.4] check if there is /opt/mydata"
cnt4=`find / -maxdepth 1 -name 'opt' -type d | wc -l`
if [ $cnt4 -eq 1 ]; then
    cnt5=`find /opt -maxdepth 1 -name 'mydata' -type d | wc -l`
    if [ $cnt5 -eq 1 ]; then
        log 1 "It seems there is /opt/mydata already, please delete it first!"
    else 
        log 0
    fi
else 
    log 0
fi


echo -n "[2] check if there is mysql user"
id mysql &> /dev/null
if [ $? -eq 0 ]; then
    log 1 "mysql user is alreay exist, please delete it first!"
else 
    log 0
fi


echo "[3] clear old mysql version --> PASS"
rpm -qa | grep -i mysql | grep -v libs | xargs rpm -ev --nodeps &> /dev/null


echo "[4] install required package --> PASS"
yum install -y libaio &> /dev/null


echo -n "[5] check if there is libaio package"
cnt6=`rpm -qa | grep libaio | wc -l`
if [ $cnt6 -lt 1 ]; then
    log 1 "libaio package is not install, please check!"
else 
    log 0
fi
    
    
echo "[6] adjust parameter in /etc/security/limits.conf --> PASS"
cat >> /etc/security/limits.conf << EOF
mysql    soft    nproc    16384
mysql    hard    nproc    16384
mysql    soft    nofile    65536
mysql    hard    nofile    65536
mysql    soft    stack    1024000
mysql    hard    stack    1024000
EOF


echo "[7] adjust parameter in /etc/sysctl.conf --> PASS"
echo "vm.swappiness = 5" >> /etc/sysctl.conf 
sysctl -p &> /etc/null
    

echo "[8] turn off firewall --> PASS"
systemctl stop firewalld
systemctl disable firewalld
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config


echo "[9] move my.cnf to /etc --> PASS"
mv my.cnf /etc/


echo "[10] add user mysql --> PASS"
groupadd mysql
useradd -r -g mysql -s /bin/false mysql


echo "[11] prepare directory --> PASS" 
mkdir -p /opt/mydata/data
mkdir -p /opt/mydata/tmp
mkdir -p /opt/mydata/log/binlog
mkdir -p /opt/mydata/log/relaylog
chown -R mysql:mysql /opt/mydata


echo "[12] add path to profile --> PASS"
echo 'export PATH=$PATH:/usr/local/mysql/bin' >> /root/.bash_profile


echo -n "[13] unpackage mysql..."
rm -rf /usr/local/mysql-*-linux-glibc2.12-x86_64 mysql
tar -xvf mysql-*-linux-glibc2.12-x86_64.tar.xz -C /usr/local/ &> /etc/null
cd /usr/local/
ln -s mysql-*-linux-glibc2.12-x86_64 mysql
echo " --> PASS"


echo -n "[14] start initialize mysql..."
cd mysql
bin/mysqld --initialize --user=mysql
if [ $? -ne 0 ]; then
    log 1 "mysql initialize failed, please check the error log!"
else 
    log 0
fi


echo -n "[15] start run mysql"
nohup bin/mysqld_safe --user=mysql &
if [ $? -ne 0 ]; then
    log 1 "mysql start failed, please check the error log!"
else 
    log 0
fi
cp support-files/mysql.server /etc/init.d/mysql


cnt7=`ps -ef | grep mysqld | grep -v grep | wc -l`
while [ $cnt7 -lt 2 ]
    do
        echo "     wait mysql startup..."
        sleep 3
        cnt7=`ps -ef | grep mysqld | grep -v grep | wc -l`
    done


echo "[16] wait 10s for mysql startup completly --> PASS"
sleep 10


echo "[17] change mysql root password --> PASS"
pass=`grep "temporary password" /opt/mydata/log/error.log |awk -F " " '{print $13}'`
/usr/local/mysql/bin/mysqladmin -uroot -p$pass password 'root' 


echo -e "[18]33[1;41;33m root@localhost initial password is 'root'33[0m" 
exit 0

3. 准备my.cnf文件

由于我这个是测试环境，所以内存值调的比较小，生产上面可以将下面几个参数进行调整
innodb_buffer_pool_size # buffer pool大小，一般设置成物理内存 * 60%
innodb_max_undo_log_size # 单个undo表空间最大值
innodb_log_file_size # 单个redo日志大小

[client]
port = 3306
socket = /opt/mydata/data/mysql.sock
default_character_set = utf8mb4

[mysql]
prompt="(\u@\h)[\d]> "
default_character_set = utf8mb4

[mysqldump]
default_character_set = utf8mb4

[mysqld]
# basic settings #
server_id = 128
user = mysql
port = 3306
basedir = /usr/local/mysql
datadir = /opt/mydata/data
tmpdir = /opt/mydata/tmp
pid_file = /opt/mydata/data/mysql.pid
socket = /opt/mydata/data/mysql.sock
character_set_server = utf8mb4
collation_server = utf8mb4_unicode_ci
transaction_isolation = READ-COMMITTED
explicit_defaults_for_timestamp = 1
max_allowed_packet = 1024M
lower_case_table_names = 1
secure_file_priv = ''
open_files_limit = 65535
skip-ssl
default_time_zone='+8:00'

# connection #
skip_name_resolve = 1
max_connections = 1000
max_user_connections = 1000 
max_connect_errors = 1000000
thread_cache_size = 512
default_authentication_plugin = mysql_native_password

# memory && myisam #
max_heap_table_size = 128M
tmp_table_size = 128M
join_buffer_size = 16M
key_buffer_size = 64M
bulk_insert_buffer_size = 16M
myisam_sort_buffer_size = 64M
myisam_max_sort_file_size = 6G
myisam_recover_options = DEFAULT

# log settings #
log_error = /opt/mydata/log/error.log
log_timestamps = SYSTEM
slow_query_log_file = /opt/mydata/log/slowquery.log
slow_query_log = 1
long_query_time = 10
log_queries_not_using_indexes = 1
log_throttle_queries_not_using_indexes = 10
min_examined_row_limit = 100
log_slow_admin_statements = 1
log_bin = /opt/mydata/log/binlog/binlog
binlog_format = row
binlog_expire_logs_seconds = 604800
binlog_rows_query_log_events = 1
binlog_row_image = minimal
binlog_cache_size = 8M
max_binlog_cache_size = 2G
max_binlog_size = 1G
log_bin_trust_function_creators = 1
general_log = 0
general_log_file= /opt/mydata/log/general.log

# innodb settings #
innodb_data_file_path = ibdata1:1024M:autoextend
innodb_buffer_pool_size = 1G
innodb_lock_wait_timeout = 10
innodb_io_capacity = 4000
innodb_io_capacity_max = 8000
innodb_flush_method = O_DIRECT
innodb_flush_neighbors = 0
innodb_max_undo_log_size = 2G
innodb_log_file_size = 1G
innodb_log_files_in_group = 4
innodb_log_buffer_size = 32M
innodb_thread_concurrency = 16
innodb_print_all_deadlocks = 1
innodb_sort_buffer_size = 16M
innodb_write_io_threads = 4             
innodb_read_io_threads = 8 
innodb_rollback_on_timeout = 1
innodb_file_per_table = 1
innodb_open_files = 65535
innodb_stats_persistent_sample_pages = 64
innodb_autoinc_lock_mode = 2

# slave #
relay_log = /opt/mydata/log/relaylog/relaylog
log_slave_updates = 1
relay_log_purge = 1
relay_log_space_limit = 30G
relay_log_recovery = 1
relay_log_info_repository = TABLE
master_info_repository = TABLE
skip-slave-start

 
至此当前目录已有三个文件

[root@mysqltest ~]# ls
install.sh  my.cnf  mysql-8.0.22-linux-glibc2.12-x86_64.tar.xz

4. 执行脚本，并查看输出

[root@mysqltest ~]# sh install.sh 
[1] start to check mysql related file --> PASS
[1.1] check if there is mysql install binary package --> PASS
[1.2] check if there is my.cnf in current directory --> PASS
[1.3] check if there is my.cnf in /etc --> PASS
[1.4] check if there is /opt/mydata --> PASS
[2] check if there is mysql user --> PASS
[3] clear old mysql version --> PASS
[4] install required package --> PASS
[5] check if there is libaio package --> PASS
[6] adjust parameter in /etc/security/limits.conf --> PASS
[7] adjust parameter in /etc/sysctl.conf --> PASS
[8] turn off firewall --> PASS
[9] move my.cnf to /etc --> PASS
[10] add user mysql --> PASS
[11] prepare directory --> PASS
[12] add path to profile --> PASS
[13] unpackage mysql... --> PASS
[14] start initialize mysql... --> PASS
[15] start run mysql --> PASS
nohup: appending output to ‘nohup.out’
     wait mysql startup...
[16] wait 10s for mysql startup completly --> PASS
[17] change mysql root password --> PASS
mysqladmin: [Warning] Using a password on the command line interface can be insecure.
Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety.
[18] root@localhost initial password is 'root'

5. 新开一个窗口登陆mysql

[root@mysqltest ~]# mysql -uroot -proot
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 9
Server version: 8.0.22 MySQL Community Server - GPL

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

(root@localhost)[(none)]> 

6. 总结

mysql8.0跟mysql5.7安装的方式没有变化，变化在于参数，文章的参数是从5.7移植过来的，到底这些参数是不是最优的，还需要进一步测试。