#!/bin/bash
#    檢查作業系統版本，該指令碼只能執行在 Centos 7.x 系統上
cat /etc/redhat-release |grep -i centos |grep '7.[[:digit:]]' >/dev/null
if [[ $? != 0 ]] 
then
    echo -e "不支援的作業系統，該指令碼只適用於CentOS 7.x  x86_64 作業系統"
    exit 1
fi
 
#    配置無人值守的安裝，定義安裝過程中需要用到的一些資訊
DBPassword=admin123
CacheSize=256M
ZBX_SERVER_NAME=Zabbix-Server
http_port=80
 
#    配置 Zabbix 防火牆
firewall-cmd --permanent --zone=public --add-port=10051/tcp
firewall-cmd --permanent --zone=public --add-port=162/udp
firewall-cmd --permanent --zone=public --add-port=$http_port/tcp
firewall-cmd --reload
 
#    禁用伺服器 SELinux
etenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=permissive/' /etc/sysconfig/selinux
 
#    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
 
#    安裝 Zabbix 4.2 Server、Web、Agent、DB
yum -y install zabbix-server-mysql zabbix-web-mysql zabbix-agent mysql mariadb-server wget
 
#    配置 Zabbix 資料庫（建立賬號，並匯入zabbix庫結構）
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
 
#    啟動 Zabbix 相關服務，並設定開機自啟動
systemctl enable zabbix-server zabbix-agent httpd
systemctl start zabbix-server zabbix-agent httpd
 
#    安裝成功，提示訪問方式
echo -e  "\n您可以通過以下地址來訪問 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
echo -e  "\n預設賬號：Admin 密碼：zabbix\n"