#!/bin/bash

 #    检查操作系统版本，该脚本只能运行在 Centos .x 系统上

 cat /etc/redhat-release |grep -i centos |grep '7.[[:digit:]]' >/dev/null

 if [[ $? !=  ]]

 then

     echo -e "不支持的操作系统，该脚本只适用于CentOS 7.x  x86_64 操作系统"

     exit

 fi

 #    配置无人值守的安装，定义安装过程中需要用到的一些信息

 DBPassword=zabbix_db_password

 CacheSize=256M

 ZBX_SERVER_NAME=XXX-Zabbix-Server

 http_port=

 #    配置 Zabbix 4.2 YUM 源

 rpm -Uvh https://mirrors.aliyun.com/zabbix/zabbix/4.2/rhel/7/x86_64/zabbix-release-4.2-1.el7.noarch.rpm

 sed -i 's/repo.zabbix.com/mirrors.aliyun.com\/zabbix/g' /etc/yum.repos.d/zabbix.repo

 yum clean all

 #    安装 Zabbix 4.2 Server、Web、Agent、DB

 yum -y install zabbix-server-mysql zabbix-web-mysql zabbix-agent mysql mariadb-server

 #    配置 Zabbix 数据库（创建账号，并导入zabbix库结构）

 systemctl enable mariadb.service

 systemctl start mariadb.service

 mysql -e "create database zabbix character set utf8 collate utf8_bin;"

 mysql -e "grant all privileges on zabbix.* to zabbix@localhost identified by '$DBPassword';"

 mysql -e "flush privileges;"

 zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql zabbix 

 #    配置 Zabbix Web Server

 sed -i 's/# php_value date.timezone Europe\/Riga/php_value date.timezone Asia\/Shanghai/' /etc/httpd/conf.d/zabbix.conf

 sed -i 's/Listen 80/Listen '$http_port'/' /etc/httpd/conf/httpd.conf

 cp /usr/share/zabbix/conf/zabbix.conf.php.example /etc/zabbix/web/zabbix.conf.php

 sed -i "10c \$DB[\"PASSWORD\"]    = '$DBPassword';" /etc/zabbix/web/zabbix.conf.php

 sed -i "16c \$ZBX_SERVER_NAME   = '$ZBX_SERVER_NAME';" /etc/zabbix/web/zabbix.conf.php

 #    配置 Zabbix Server

 sed -i "/^# DBPassword=/a DBPassword=$DBPassword" /etc/zabbix/zabbix_server.conf

 sed -i "/^# CacheSize=8M/a CacheSize=$CacheSize" /etc/zabbix/zabbix_server.conf

 sed -i "/^# StartPingers=1/a StartPingers=10" /etc/zabbix/zabbix_server.conf

 #    启动 Zabbix 相关服务，并设置开机自启动

 systemctl enable zabbix-server zabbix-agent httpd

 systemctl start zabbix-server zabbix-agent httpd

 #    配置 Zabbix 防火墙

 firewall-cmd --permanent --zone=public --add-port=/tcp

 firewall-cmd --permanent --zone=public --add-port=/udp

 firewall-cmd --permanent --zone=public --add-port=$http_port/tcp

 firewall-cmd --reload

 #    禁用服务器 SELinux

 etenforce

 sed -i 's/SELINUX=enforcing/SELINUX=permissive/' /etc/sysconfig/selinux

 #    安装成功，提示访问方式

 echo -e  "\n您可以通过以下地址来访问 Zabbix Web Page\n"

 for i in `ip a | grep 'inet ' | awk '{print $2}' | awk -F '/' '{print $1}'` ; do echo -e "\thttp://$i:$http_port/zabbix" ; done