[系统运维]nginx+tomcat+nfs--web集群脚本分享，亲测可用

服务器架构如下：

?架构解析：nginx代理外部的web访问请求，由两台到多台tomcat服务器提供真实的web服务，为了保证所有用户访问网站的统一性，所有tomcat服务器的网站根目录指向NFS（图中Database服务器）共享目录。

架构作用：提升网站吞吐性能，保持web架构一定的冗余性（仅tomcat）

部署需要至少4台服务器，服务器操作系统版本centos7.9，外网通。

服务器部署顺序为：NFS→tomcat→nginx

您只需将对应脚本上传到对应服务器执行即可，tomcat安装包csdn搜索下载对应版本再上传到服务器对应目录即可（具体安装包版本运行脚本时有提示）。

闲话少说，三个脚本如下：

NFS：

#!/bin/bash
#function:tomcat
#author:tommypeng 20220714 final version
##########################################
 if
  [  "$USER"  != "root"   ]
then
   echo "错误：非root用户，权限不足！"
  exit  0
fi
###############防火墙及SElinux############
systemctl stop firewalld && systemctl disable firewalld  && echo "防火墙已经关闭"
sed -i 's/SELINUX=.*/SELINUX=disabled/g'  /etc/selinux/config  && echo "关闭selinux"
echo  "脚本所需安装包请访问作者个人网站：https://www.huoshichong.cn/index.php/download.html"
sleep 10
###############网络############
ping -c 3   www.baidu.com
if
   [ $? -eq 0 ]
   then
   echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m网络畅通，即将安装依赖包\033[0m"
   else 
     echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m即将退出，请检查外网通讯 !\033[0m"
        exit  0
fi
##################NFS#####################
yum install -y rpc* nfs-utils  &&   echo  "NFS安装成功"
#################创建文件夹#################
mkdir /pengxiaogang  &&  chmod -R 777 /pengxiaogang  &&  echo  "共享文件夹创建成功"
cat >>  /etc/exports  <<  EOF
/pengxiaogang *(rw,sync)
EOF

############按顺序启动rpcbind和nfs服务################
systemctl start rpcbind  &&  systemctl start nfs  &&  echo "按顺序启动rpcbind和nfs服务成功"
##############配置生效##############
exportfs -r
##################测试####################
showmount -e localhost  &&  echo "I love you,I love BDQN!!" > /pengxiaogang/index.jsp

请查询好NFS服务器的IP地址备用，再另一台服务器运行tomcat脚本：

tomcat：

#!/bin/bash
#function:tomcat
#author:tommypeng 20220714 final version
##########################################
 if
  [  "$USER"  != "root"   ]
then
   echo "错误：非root用户，权限不足！"
  exit  0
fi
###############防火墙及SElinux############
systemctl stop firewalld && systemctl disable firewalld  && echo "防火墙已经关闭"
sed -i 's/SELINUX=.*/SELINUX=disabled/g'  /etc/selinux/config  && echo "关闭selinux"
echo  "脚本所需安装包请访问作者个人网站：https://www.huoshichong.cn/index.php/download.html"
sleep 10
############清理老旧包###########
rpm -qa | grep java  >  /root/888.txt
PLIST=$(cat  /root/888.txt)
for  PKGNAME   in    $PLIST
do
      rpm -e --nodeps   $PKGNAME   &&  echo  "老旧包已经清理完毕" 
done
rm -rf  /root/888.txt  &&  echo "临时文件已删除"
sleep 5
tarbagp=/usr/local
#判断文件是否存在，如果存在就不用下载了
function is_exist()
{
	if [ ! -f $tarbagp/$1 ];then
		echo  "请上传$1到/usr/local/"	
		###return 2###
		exit 0
	fi
}
###############安装JDK############
cd $tarbagp
   #判断文件是否存在
   is_exist jdk-8u311-linux-x64.tar.gz 
   is_exist apache-tomcat-8.5.72.tar.gz
   if [ $? -eq 0 ];then
   echo  "安装包已经就位，准备安装"
   fi
   sleep  5
cd $tarbagp &&  tar -zxvf jdk-8u311-linux-x64.tar.gz   &&   mv jdk1.8.0_311  jdk1.8
##############配置环境变量##############
cat >> /etc/profile  <<EOF
export JAVA_HOME=/usr/local/jdk1.8/

export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$PATH:$JAVA_HOME/bin

EOF
sleep 4
source /etc/profile
source /etc/profile
##########安装tomcat###########
cd $tarbagp
mkdir myDir
cp  $tarbagp/apache-tomcat-8.5.72.tar.gz  $tarbagp/myDir  &&  cd $tarbagp/myDir
tar -zxvf apache-tomcat-8.5.72.tar.gz  &&   mv apache-tomcat-8.5.72  tomcat8
cd $tarbagp/myDir/tomcat8/bin/
sleep  3 
####sed -i '#\#!/bin/sh  #a\\   JAVA_HOME=/usr/local/jdk1.8/ '  /usr/local/myDir/tomcat8/bin/catalina.sh
sed  '2aJAVA_HOME=/usr/local/jdk1.8/'   /usr/local/myDir/tomcat8/bin/catalina.sh
./startup.sh    
if [ $? -eq 0 ];then
   echo  "tomcat启动成功"
else
   echo "tomcat启动失败，看来这个脚本没有帮到你，您还是自己折腾吧"
   exit 1
 fi
 ###############NFS################
 read  -p  "请输入NFS服务器的IP  " nfsip
 mount -v -t nfs $nfsip:/pengxiaogang  /usr/local/myDir/tomcat8/webapps/ROOT 
 mount -v -t nfs $nfsip:/pengxiaogang  /usr/local/myDir/tomcat8/webapps/ROOT
 rm -rf  /usr/local/myDir/tomcat8/webapps/ROOT/index.jsp 
 ###默认首页目录/usr/local/myDir/tomcat8/webapps/ROOT#########
####默认安装目录/usr/local/myDir/tomcat8#######


   

再第三台服务器在此运行以上脚本，安装两台tomcat服务器完毕，您需要准备好这两台tomcat服务器的IP备用，运行nginx脚本时需要提供。

第四台服务器，安装nginx，用如下脚本安装：

#!/bin/bash
#function:nginx代理
#author:tommypeng 20220714 final version
##########################################
 if
  [  "$USER"  != "root"   ]
then
   echo "错误：非root用户，权限不足！"
  exit  0
fi
###############防火墙及SElinux############
systemctl stop firewalld && systemctl disable firewalld  && echo "防火墙已经关闭"
sed -i 's/SELINUX=.*/SELINUX=disabled/g'  /etc/selinux/config  && echo "关闭selinux"
###############网络############
ping -c 3   www.baidu.com
if
   [ $? -eq 0 ]
   then
   echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m网络畅通，即将安装依赖包\033[0m"
   else 
     echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m即将退出，请检查外网通讯 !\033[0m"
        exit  0
fi
#######################依赖包###################
yum -y install  gcc gcc-c++ autoconf automake libtool make openssl openssl-devel pcre pcre-devel  wget
#############下载安装包##############
cd  /usr/local/src/    &&   wget  http://nginx.org/download/nginx-1.8.1.tar.gz 
if
   [ $? -eq 0 ]
   then
   echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m安装包已经下载成功\033[0m"
   else 
     echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m哟吼，滚犊子的下载失败了，即将退出 !\033[0m"
        exit  0
fi
###############编译及安装#############
    cd  /usr/local/src/  &&  	tar -zxvf nginx-1.8.1.tar.gz
if [ $? -eq 0 ];then
cd  /usr/local/src/nginx-1.8.1
./configure \
--prefix=/usr/local/nginx \
--with-http_ssl_module \
--with-http_flv_module \
--with-http_stub_status_module \
--with-http_gzip_static_module \
--with-pcre
make  && make install
             if  [ $? -eq 0 ];then
                	echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m nginx编译安装成功 !\033[0m"
        	 else
                	echo -e "\033[32m nginx编译安装失败，请检查！ \033[0m"
                	exit 1
        	 fi
	fi
mv  /usr/local/nginx/conf/nginx.conf   /usr/local/nginx/conf/nginx.conf.bak    &&  echo "已备份默认配置文件，即将重建配置文件含反向代理"
sleep 5
read -p  "请输入第一台tomcat服务器的IP  "   tomcata
read -p  "请输入第二台tomcat服务器的IP  "   tomcatb
cat >>  /usr/local/nginx/conf/nginx.conf  <<EOF
#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;
    upstream backend{
                                                             server  $tomcata:8080; 
                                                             server  $tomcatb:8080;      
                                                              }

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
            proxy_pass http://backend;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}
EOF
/usr/local/nginx/sbin/nginx -t 
 if  [ $? -eq 0 ];then
                	echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m nginx配置测试成功 !\033[0m"
        	 else
                	echo -e "\033[32m nginx配置测试失败，请检查，6秒后退出！ \033[0m"
                	sleep  6
                	exit 1
fi
/usr/local/nginx/sbin/nginx
if  [ $? -eq 0 ];then
                	echo -e "\n\033[32m-----------------------------------------------\033[0m"
                	echo -e "\033[32m nginx启动成功 !\033[0m"
        	 else
                	echo -e "\033[32m nginx启动失败，请检查，8秒后退出！ \033[0m"
                	sleep  8
                	exit 1
fi
echo "
常用命令：
# 进入生成目录
cd  /usr/local/nginx
# 测试
/usr/local/nginx/sbin/nginx -t
# 查看编译模块信息
/usr/local/nginx/sbin/nginx -V
# 启动
/usr/local/nginx/sbin/nginx
# 重新载入配置文件
/usr/local/nginx/sbin/nginx  -s reload
# 重启
/usr/local/nginx/sbin/nginx  -s reopen
# 停止
/usr/local/nginx/sbin/nginx  -s stop  "

以上四台您部署完毕后，访问nginx服务器的ip

如果出现如下界面则表示集群部署成功！！！