简介

######数据库目录/usr/local/mysql############
######数据目录/data/mysql############
######慢日志目录/data/slowlog############
######端口号默认3306其余参数按需自行修改############

安装脚本

#!/bin/bash
cd /usr/local/src/
if [ ! -f  mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz  ]; then
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
fi

yum install -y autoconf automake imake libxml2-devel expat-devel cmake gcc gcc-c++ libaio libaio-devel bzr bison libtool ncurses-devel  gcc gcc-c++  

# Check if user is root
if [ $(id -u) != "0" ]; then
    echo "Error: You must be root to run this script, please use root to install"
    exit 1
fi
clear

cd     /usr/local/src

if [ ! -f  jemalloc-5.0.1.tar.bz2  ]; then

yum install  bzip2 -y
wget       https://github.com/jemalloc/jemalloc/releases/download/5.0.1/jemalloc-5.0.1.tar.bz2
tar     -xjvf     jemalloc-5.0.1.tar.bz2

cd jemalloc-5.0.1/
./configure  -prefix=/usr/local/jemalloc    --libdir=/usr/local/lib
make  && make install

echo  /usr/local/lib >> /etc/ld.so.conf
ldconfig
fi

cp /usr/local/lib/libjemalloc.so            /usr/lib

echo "========================================================================="
echo "A tool to auto-compile & install MySQL 5.7.21 on Redhat/CentOS Linux "
echo "========================================================================="
cur_dir=$(pwd)
#set mysql root password
    echo "==========================="
    mysqlrootpwd="123456"
    echo -e "Please input the root password of mysql:"
    read -p "(Default password: 123456):" mysqlrootpwd
    if [ "$mysqlrootpwd" = "" ]; then
        mysqlrootpwd="123456"
    fi
    echo "==========================="
    echo "MySQL root password:$mysqlrootpwd"
    echo "==========================="
#which MySQL Version do you want to install?
echo "==========================="
    isinstallmysql57="n"
    echo "Install MySQL 5.7.21,Please input y"
    read -p "(Please input y , n):" isinstallmysql57
    case "$isinstallmysql57" in
    y|Y|Yes|YES|yes|yES|yEs|YeS|yeS)
    echo "You will install MySQL 5.7.21"
    isinstallmysql57="y"
    ;;
    *)
    echo "INPUT error,You will exit install MySQL 5.7.21"
    isinstallmysql57="n"
    exit
    esac
    get_char()
    {
    SAVEDSTTY=`stty -g`
    stty -echo
    stty cbreak
    #dd if=/dev/tty bs=1 count=1 2> /dev/null
    stty -raw
    stty echo
    stty $SAVEDSTTY
    }
    echo ""
    echo "Press any key to start...or Press Ctrl+c to cancel"
    char=`get_char`

# Initialize  the installation related content.
function InitInstall()
{
    cat /etc/issue
    uname -a
    MemTotal=`free -m | grep Mem | awk '{print  $2}'`  
    echo -e "\n Memory is: ${MemTotal} MB "
    #Set timezone
    #rm -rf /etc/localtime
    #ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
    #Delete Old Mysql program
    rpm -qa|grep mysql
    rpm -e mysql
    #Disable SeLinux
    if [ -s /etc/selinux/config ]; then
    sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
    fi
    setenforce 0
}
#Installation of depend on and optimization options.
function InstallDependsAndOpt()
{
cd $cur_dir
cat >>/etc/security/limits.conf<<EOF
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535
EOF
echo "fs.file-max=65535
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_max_tw_buckets = 4096
net.ipv4.tcp_max_syn_backlog = 4096
" >> /etc/sysctl.conf

sysctl -p
}
#Install MySQL
function InstallMySQL57()
{
echo "============================Install MySQL 5.7.21=================================="
cd $cur_dir
#Backup old my.cnf
#rm -f /etc/my.cnf
if [ -s /etc/my.cnf ]; then
    mv /etc/my.cnf /etc/my.cnf.`date +%Y%m%d%H%M%S`.bak
fi

echo "============================MySQL 5.7.21 installing…………========================="

#mysql directory configuration
cd /usr/local/src
tar  xvf   mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.21-linux-glibc2.12-x86_64   /usr/local/mysql
groupadd mysql -g 512
useradd -u 512 -g mysql -s /sbin/nologin -d /home/mysql mysql
mkdir -p /data/mysql
mkdir -p /data/slowlog
chown -R mysql:mysql /data/mysql
chown -R mysql:mysql /usr/local/mysql
chown -R mysql:mysql /data/slowlog

#edit /etc/my.cnf
SERVERID=`ifconfig eth0 | grep "inet" | awk '{ print $2}'| awk -F. '{ print $3$4}'`

cat >>/etc/my.cnf<<EOF
[client]
port=3306
socket=/tmp/mysql.sock
default-character-set=utf8
[mysql]
no-auto-rehash
default-character-set=utf8
[mysqld]
port=3306
bind-address = 0.0.0.0
character-set-server=utf8
socket=/tmp/mysql.sock
pid-file=/data/mysql/mysqld.pid
basedir=/usr/local/mysql
datadir=/data/mysql
explicit_defaults_for_timestamp=true
lower_case_table_names=1
back_log=103
max_connections=3000
max_connect_errors=100000
table_open_cache=512
external-locking=FALSE
max_allowed_packet=32M
sort_buffer_size=16M
join_buffer_size=2M
thread_cache_size=51
query_cache_size=32M
#query_cache_limit=4M
transaction_isolation=REPEATABLE-READ
tmp_table_size=96M
max_heap_table_size=96M
###***slowqueryparameters
long_query_time=1
slow_query_log = 1
slow_query_log_file=/data/slowlog/slow.log
###***binlogparameters
log-bin=mysql-bin
binlog_cache_size=4M
max_binlog_cache_size=4096M
max_binlog_size=1024M
binlog_format=MIXED
expire_logs_days=7
###***relay-logparameters
#relay-log=/data/3307/relay-bin
#relay-log-info-file=/data/3307/relay-log.info
#master-info-repository=table
#relay-log-info-repository=table
#relay-log-recovery=1
#***MyISAMparameters
key_buffer_size=16M
read_buffer_size=1M
read_rnd_buffer_size=16M
bulk_insert_buffer_size=1M
#skip-name-resolve
###***master-slavereplicationparameters
server-id=$SERVERID
#slave-skip-errors=all

#***Innodbstorageengineparameters
innodb_buffer_pool_size=2G            #  操作系统内存的70%-80%最佳。
innodb_data_file_path=ibdata1:10M:autoextend
#innodb_file_io_threads=8
innodb_thread_concurrency=16
innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=16M
innodb_log_file_size=512M
innodb_log_files_in_group=2
innodb_max_dirty_pages_pct=75
innodb_buffer_pool_dump_pct=50
innodb_lock_wait_timeout=50
innodb_file_per_table=OFF

[mysqldump]
quick
max_allowed_packet=32M

[myisamchk]
key_buffer=16M
sort_buffer_size=16M
read_buffer=8M
write_buffer=8M
[mysqld_safe]
malloc-lib=/usr/lib/libjemalloc.so
open-files-limit=8192
log-error=/data/mysql/error.log
pid-file=/data/mysql/mysqld.pid
EOF

/usr/local/mysql/bin/mysqld     --defaults-file=/etc/my.cnf     --user=mysql --datadir=/data/mysql   --basedir=/usr/local/mysql  --initialize-insecure

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chmod 700 /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig --level 2345 mysqld on

cat >> /etc/ld.so.conf.d/mysql-x86_64.conf<<EOF
/usr/local/mysql/lib
EOF
ldconfig

if [ -d "/proc/vz" ];then
ulimit -s unlimited
fi

/etc/init.d/mysqld start
cat >> /etc/profile <<EOF
export PATH=$PATH:/usr/local/mysql/bin
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mysql/lib
EOF

/usr/local/mysql/bin/mysqladmin -u root password $mysqlrootpwd

cat > /tmp/mysql_sec_script<<EOF
use mysql;
#delete from mysql.user where user!='root' or host!='localhost';
#grant all privileges on *.* to 'sys_admin'@'%' identified by 'MANAGER';
flush privileges;
EOF

/usr/local/mysql/bin/mysql -u root -p$mysqlrootpwd -h localhost < /tmp/mysql_sec_script
rm -f /tmp/mysql_sec_script
#/etc/init.d/mysqld restart
echo "============================MySQL 5.7.21 install completed========================="
}
function CheckInstall()
{
echo "===================================== Check install ==================================="
clear
ismysql=""
echo "Checking..."
if [ -s /usr/local/mysql/bin/mysql ] && [ -s /usr/local/mysql/bin/mysqld_safe ] && [ -s /etc/my.cnf ]; then
  echo "MySQL: OK"
  ismysql="ok"
  else
  echo "Error: /usr/local/mysql not found!!!MySQL install failed."
fi
if [ "$ismysql" = "ok" ]; then

echo "Install MySQL 5.7.21 completed! enjoy it."
echo "========================================================================="

netstat -lntup
else
echo "Sorry,Failed to install MySQL!"
echo "You can tail /root/mysql-install.log from your server."
fi
}
#The installation log

InitInstall 2>&1 | tee /root/mysql-install.log
InstallDependsAndOpt 2>&1 | tee -a /root/mysql-install.log
InstallMySQL57 > /dev/null
CheckInstall 2>&1 | tee -a /root/mysql-install.log

备份

mysqldump  -uroot -p123456 -B  ultrax        --single-transaction  --master-data=2  > ultrax.sql

-A  全备份
-B  备份库（表结构和数据）
--single-transaction    预防锁   数据一致性   确保本次会话(dump)时，不会看到其他会话已经提交了的数据。
--master-data=2     注释记录复制信息
                       =1      记录change  master to 语句

查看ＳＱＬ

egrep -v "#|\*|--|^$"    ultrax.sql

恢复

mysql  -uroot -p123456        < /root/ultrax.sql

修改密码

[mysqld]
skip-grant-tables

./mysqladmin -uroot -p password

update user set password=password('root') where user='root';

update user set authentication_string=PASSWORD('123456')  where user='root';