安装mysql

#!/bin/bash
#install mysql for binary

wget_mysql_package () {

flag=$(rpm -q wget &>/dev/null ; echo $?)
if [ $flag -ne 0 ];then 
        yum install wget -y 
fi

if [ ! -d /opt/software ];then
        mkdir -p /opt/software/application
fi

mysql_url=https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-linux-glibc2.12-x86_64.tar
mysql_package=$(echo $mysql_url|awk -F/ '{print $7}')
mysql_directory=$(echo $mysql_url|awk -F/ '{print $7}'|cut -d. -f1-4)

wget -P /opt/software/ $mysql_url

if [ ! -f /opt/software/$mysql_package ];then
        echo "mysql package is not download"
        exit
fi

cd /opt/software/
tar -xvf  /opt/software/$mysql_package 

if [ $? -ne 0 ];then 
        echo "mysql package tar faild"
        exit
fi

if [ ! -f /opt/software/mysql-5.7.29-linux-glibc2.12-x86_64.tar.gz ];then 
        echo " file is not exsit"
        exit
fi

tar -xvzf /opt/software/mysql-5.7.29-linux-glibc2.12-x86_64.tar.gz

ln -s /opt/software/mysql-5.7.29-linux-glibc2.12-x86_64 /opt/software/mysql 
}


install_mysql () {
############定义变量##################
export PATH=/opt/software/mysql/bin:$PATH

############创建mysql用户#############

useradd -s /bin/nologin -M mysql 

id mysql &>/dev/null 
if [ $? -ne 0 ];then 
        exit
fi

#########创建mysql的数据目录#########
mkdir -p /data/mysql 
chown -R mysql:mysql /data/mysql 
chown -R mysql:mysql  /opt/software/mysql 



########初始化数据库################
mysqld --initialize-insecure  --user=mysql --basedir=/opt/software/mysql --datadir=/data/mysql 

#######mysql config################
cat >/etc/my.cnf <<EOF
[mysqld]
user=mysql 
basedir=/opt/software/mysql
datadir=/data/mysql
socket=/tmp/mysql.sock
port=3306
server_id=1

[mysql]
socket=/tmp/mysql.sock

EOF
}

mysql_start () {
cp -a /opt/software/mysql/support-files/mysql.server  /etc/init.d/mysql 
/etc/init.d/mysql start

netstat -tanp |grep 3306

}


wget_mysql_package  
install_mysql  
mysql_start