mysql5.7 在Centeros 6 下自动安装的shell脚本

概述：

此脚本实现了在Centeros 6版本下自动安装mysql5.7到目录 /opt/mysql-5.7*并且做软连接映射到 /usr/local/mysql,自动修改root密码为：12345678，开启root远程访问账户，此脚本yum源搭建部分请参考：Centeros 下自动区分release，连接到远程FTP yum源

讨论：

刚开始接触shell，感觉很不规范，没有进行模块区分，没有设置动态变量如密码，用户，安装目录，日志目录等等，后边会完善

脚本原文：

#!/bin/bash
rpm -qa | grep mysql | xargs rpm -e
# CenterOS config yum
osv=`rpm -q --qf %{version} centos-release`
echo "您的centeros release 版本：$osv"
echo -e "\n"

if [[ $osv -eq 6 || $osv -eq 7 ]]
then
#config yum
rm -rf /etc/yum.repos.d/*
echo "[CenterOS-source]
name=Linux "'$releasever'" - "'$basearch'" - Source
baseurl=ftp://10.0.0.1/pub/cos$osv
enabled=1
gpgcheck=0" > /etc/yum.repos.d/rhel-source.repo
yum makecache

if [ $? -gt 0 ]
then
echo "执行错误"
break
fi

echo "执行成功"
break

else
echo -e "此脚本不适配您的操作系统\n"

fi

#ulimit
ulimit -n 65535
sed -i "/soft nofile 65535/d" /etc/security/limits.conf
sed -i "/hard nofile 65535/d" /etc/security/limits.conf

echo "* soft nofile 65535
* hard nofile 65535" >> /etc/security/limits.conf

#apt-get install -y libaio*
#user and group
groupadd mysql
useradd -r -g mysql mysql
#passwd mysql

#packages
rm -rf /opt/mysql-5.7.22-linux-glibc2.12-x86_64
rm -f /usr/local/mysql/mysql-5.7.22-linux-glibc2.12-x86_64
rm -f /usr/local/mysql
cd /opt
tar zxvf $PWD/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz -C /opt
ln -s /opt/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql
mkdir /var/run/mysqld
mkdir /opt/mysql-5.7.22-linux-glibc2.12-x86_64/log
mkdir /opt/mysql-5.7.22-linux-glibc2.12-x86_64/data
chown -R mysql:mysql /var/run/mysqld
chown -R mysql:mysql /opt/mysql-5.7.22-linux-glibc2.12-x86_64
#install database
cd /usr/local/mysql/
echo "" >/usr/local/mysql/log/error.log
chown -R mysql:mysql /usr/local/mysql
chown mysql:mysql /usr/local/mysql/log/error.log

sed -i "/#mysql config/d" /etc/profile
sed -i "\/export\ PATH=\$PATH\:\/usr\/local\/mysql\/bin/d" /etc/profile
echo "#mysql config
export PATH="'$PATH'":/usr/local/mysql/bin" >> /etc/profile
source /etc/profile
sed -i "/#mysql config/d" /root/.bashrc
sed -i "\/export\ PATH=\$PATH\:\/usr\/local\/mysql\/bin/d" /root/.bashrc
echo "#mysql config
export PATH="'$PATH'":/usr/local/mysql/bin" >> /root/.bashrc
source /root/.bashrc
mv -f /etc/my.cnf /etc/my.cnf.bak
echo "[client]
port= 3306
[mysqld]
#skip-grant-tables
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
pid-file=/var/run/mysqld/mysqld.pid
general_log=0
general_log_file=/usr/local/mysql/log/query.log
port= 3306
lower_case_table_names=1
#skip-name-resolve

character_set_server=utf8

default-storage-engine=INNODB
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
max_connections=2000

key_buffer_size = 20G
myisam_sort_buffer_size = 1280M
myisam_max_sort_file_size = 20G
myisam_repair_threads = 1

query_cache_size=5073741824
query_cache_type=1
slow-query-log=0
slow_query_log_file=/usr/local/mysql/log/slow_query.log
long_query_time=5
log-error=/usr/local/mysql/log/error.log

table_open_cache=2000

thread_cache_size=300

tmp_table_size=246M
max_heap_table_size=246M

thread_stack = 192k
key_buffer_size=512M
read_buffer_size=4M
read_rnd_buffer_size=32M

log-bin=mysql-bin
server-id=1

innodb_flush_log_at_trx_commit=2
innodb_log_buffer_size=16M
innodb_buffer_pool_size=50G
innodb_thread_concurrency=128
innodb_autoextend_increment=1000
innodb_buffer_pool_instances=8
innodb_concurrency_tickets=5000
innodb_log_file_size = 1G
innodb_log_files_in_group = 3

innodb_old_blocks_time=1000
innodb_open_files=1000
innodb_stats_on_metadata=0
innodb_file_per_table=1
innodb_checksum_algorithm=0

back_log=512
flush_time=0
join_buffer_size=128M
max_allowed_packet=1024M
max_connect_errors=3000
open_files_limit=5000

sort_buffer_size=32M
table_definition_cache=1400
binlog_row_event_max_size=8K

sync_master_info=10000
sync_relay_log=10000
sync_relay_log_info=10000

bulk_insert_buffer_size = 64M
log_timestamps=SYSTEM
log_error_verbosity=2" > /etc/my.cnf

mv -f /etc/init.d/mysqld /etc/init.d/mysqld.bak
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld
#vi /etc/init.d/mysqld
# 46行 basedir=/usr/local/mysql datadir=/usr/local/mysql/data
sed -i '46s/basedir\=/basedir\=\/usr\/local\/mysql/g' /etc/init.d/mysqld
sed -i '47s/datadir\=/datadir\=\/usr\/local\/mysql\/data/g' /etc/init.d/mysqld
pkill -9 mysql
rm -rf /usr/local/mysql/data/*
echo "" > /usr/local/mysql/log/error.log
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
#sleep 1
/etc/init.d/mysqld start
ps -ef | grep mysql
#defaultmysqlpwd=`grep 'A temporary password' /usr/local/mysql/log/error.log | awk -F"root@localhost: " '{ print $2}' `
#echo $defaultmysqlpwd
sleep 10
ps -ef | grep mysql
mysqladmin -uroot password 12345678
mysql -uroot -p12345678 <<EOF
grant all privileges on *.* to root@'%' identified by '12345678';flush privileges;
EOF
mysql -uroot -p12345678