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阿里云一键部署 LNMP栈

LNMP代表Linux+Nginx+MySQL+PHP网站服务器架构。本文主要目的是为大家提供一种非常简单的方法，在阿里云上部署LNMP栈。
通过<阿里云ROS资源编排服务>，将VPC、NAT Gateway、ECS创建，LNMP栈部署过程自动化，使大家能够非常方便地部署一个LNMP栈。

一键部署LNMP栈>>
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注意：

必须确保可以正确下载nginx-.rpm和phpMyAdmin-.zip安装包，我们可以选择类似如下的URL：
- https://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
- https://oss.aliyuncs.com/aliyunecs/onekey/phpMyAdmin-4.1.8-all-languages.zip
CentOS-7
我们选择的数据中心在上海/北京。

安装LNMP：关闭防火墙，关闭SELinux，安装nginx，MySQL和PHP，最后我们也安装了phpMyAdmin。UserData主要内容如下：

    "systemctl stop firewalld.service \n",
    "systemctl disable firewalld.service \n",
    "sed -i 's/^SELINUX=/# SELINUX=/' /etc/selinux/config \n",
    "sed -i '/# SELINUX=/a SELINUX=disabled' /etc/selinux/config \n",
    "setenforce 0 \n",
    "yum install yum-priorities -y \n",
    "yum -y install aria2 \n",
    "aria2c $NginxUrl \n",
    "rpm -ivh nginx-*.rpm \n",
    "yum -y install nginx \n",
    "systemctl start nginx.service \n",
    "systemctl enable nginx.service \n",
    "yum -y install php-fpm \n",
    "systemctl start php-fpm.service \n",
    "systemctl enable php-fpm.service \n",
    "sed -i '/FastCGI/,/htaccess/s/    #/    /' /etc/nginx/conf.d/default.conf \n",
    "sed -i '/FastCGI/s/^    /    #/' /etc/nginx/conf.d/default.conf \n",
    "sed -i '/htaccess/s/^    /    #/' /etc/nginx/conf.d/default.conf \n",
    "sed -i '/SCRIPT_FILENAME/s/\\/scripts/\\/usr\\/share\\/nginx\\/html\\//' /etc/nginx/conf.d/default.conf \n",
    "yum -y install mariadb mariadb-server \n",
    "systemctl start mariadb.service \n",
    "systemctl enable mariadb.service \n",
    "yum -y install php php-mysql php-gd libjpeg* php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-bcmath php-mhash \n",
    "MDSRING=`find / -name mbstring.so` \n",
    "echo extension=$MDSRING >> /etc/php.ini \n",
    "systemctl restart mariadb.service \n",
    "mysqladmin -u root password \"$dbrootpassword\" \n",
    "$(mysql $dbname -u root --password=\"$dbrootpassword\" >/dev/null 2>&1 </dev/null); (( $? != 0 )) \n",
    "echo CREATE DATABASE $dbname ; > /tmp/setup.mysql \n",
    "echo GRANT ALL ON $dbname.* TO \"$dbuser\"@\"localhost\" IDENTIFIED BY \"$dbpassword\" ; >> /tmp/setup.mysql \n",
    "mysql -u root --password=\"$dbrootpassword\" < /tmp/setup.mysql \n",
    "$(mysql $dbname -u root --password=\"$dbrootpassword\" >/dev/null 2>&1 </dev/null); (( $? != 0 )) \n",
    "cd /root \n",
    "aria2c $PhpMyAdminUrl \n",
    "unzip phpMyAdmin-*.zip \nmkdir -p /usr/share/nginx/html/phpmyadmin \nmv phpMyAdmin-*.*/* /usr/share/nginx/html/phpmyadmin \n",
    "systemctl restart php-fpm.service \n",
    "systemctl restart nginx.service \n",