#!/bin/bash
##nagios监控软件一件使用
##date : 2016-08-23
##作者：liuwenzhi

#定义变量
YUMNUM=`yum repolist 2>/dev/null|grep repolist: |sed 's/[^0-9]//g'`
NAGIOSzip=nagios.zip
NAGIOS=nagios

#定义yum源是否可用脚本
YUMREPO (){
        echo -ne "3[34m正在检测yum源3[0m"
        sleep 3
        if [ $YUMNUM -eq 0 ];then
        echo -e "3[32myum源不可用，请先配置yum源3[0m"
        exit 10
        else
        echo -e "3[34myum源检测通过!3[0m"
        fi
}
#定义菜单
menu (){
           echo "  ##############----一键安装菜单----##############"
           echo "# 1. 安装nagios 监控端"
           echo "# 2. 安装远程被监控端"
           echo "# 3. 退出 "
           read -p "请输入菜单【1-3】" select
}
#安装nagios依赖环境
yilai_install (){
        echo "----------正在安装依赖包"
        case $select in
        1)
                yum install -y httpd  php  gcc glibc unzip zip 
glibc-common  gd  gd-devel libpng libjpeg zlib openssl-devel 
&>/dev/null
        ;;
        2)
                yum install -y gcc openssl-devel &>/dev/null
                ;;
        esac
        echo "----------依赖安装完成"
}
#定义configure时是否出错
configure_err(){
        if [ $? -ne 0 ];then
        echo "cofigure失败"
        exit 11
        fi
}
#定义make时是否出错
make_err(){
        if [ $? -ne 0 ];then
        echo "make失败"
        exit 12
        fi
}
#定义make install 安装时是否出错
make_install_err(){
        if [ $? -ne 0 ];then
        echo "make install失败"
        exit 13
        fi
}

#修改httpd文件支持php
xiugai_httpd (){
        sed -i '/^DirectoryIndex/s/$/& index.php/g' /etc/httpd/conf/httpd.conf
        service httpd start &>/dev/null
        chkconfig httpd on
}
#nagios安装
nagios_install (){
        echo "----------安装nagios"
        groupadd  nagcmd  &>/dev/null
        useradd -s /sbin/nologin nagios &>/dev/null
        usermod -G nagcmd  apache
        if [ -f $NAGIOS ];then
        rm -rf $NAGIOS
        fi 
        unzip $NAGIOSzip  &>/dev/null
        cd $NAGIOS
        tar -zxf nagios-3.2.1.tar.gz -C  /usr/src &>/dev/null
        cd /usr/src/nagios-3.2.1/
        echo "----------编译中"
        ./configure --with-command-group=nagcmd &>/dev/null
        configure_err
        make all  &>/dev/null
        make_err
        make install    &>/dev/null
        make_install_err
        make install-init  &>/dev/null
        make install-config  &>/dev/null
        make install-commandmode  &>/dev/null
        make install-webconf    &>/dev/null
}
#nagios-plugins安装
plugins(){
        cd - &>/dev/null
        tar -zxf nagios-plugins-1.4.14.tar.gz
        cd nagios-plugins-1.4.14
        ./configure --with-nagios-user=nagios  \
        --with-nagios-group=nagcmd  &>/dev/null
         configure_err
        make      &>/dev/null
        make_err
        make install    &>/dev/null
        make_install_err
#监控脚本资源在ls /usr/local/nagios/libexec/ 下
}
#安装nrpe
nrpe_install (){
        cd - &>/dev/null
        tar -zxf  nrpe-2.12.tar.gz
        cd nrpe-2.12
        ./configure &>/dev/null
        configure_err
        make      &>/dev/null
        make_err
        make install    &>/dev/null
        make_install_err
        make install-plugin &>/dev/null
        sed -i '$a\define command  {' /usr/local/nagios/etc/objects/commands.cfg
        sed -i '$a\         command_name    check_nrpe' /usr/local/nagios/etc/objects/commands.cfg
        sed -i '$a\         command_line  $USER1$/check_nrpe -H 
$HOSTADDRESS$  -c  $ARG1$ ' /usr/local/nagios/etc/objects/commands.cfg
        sed -i '$a\  }' /usr/local/nagios/etc/objects/commands.cfg
#cd /usr/local/nagios/etc/objects/
#read -p "请输入需要监控的用户名" u
#cp localhost.cfg $u.cfg
#sed  -i '/host_name/s/localhost/$u/g' /usr/local/nagios/etc/objects/localhost.cfg
#sed -i '$a\cfg_file=/usr/local/nagios/etc/objects/$u.cfg

}


#修改配置文件
abc (){
        [ -f /usr/local/nagios/etc/objects/commands.cfg ] || \
        cp /usr/src/nagios-3.2.1/sample-config/template-object/commands.cfg  /usr/local/nagios/etc/objects/
        [ -f /usr/local/nagios/etc/objects/localhost.cfg ] || \
        cp /usr/src/nagios-3.2.1/sample-config/template-object/localhost.cfg  /usr/local/nagios/etc/objects/
        [ -f /usr/local/nagios/etc/nagios.cfg ] || \
        cp /usr/src/nagios-3.2.1/sample-config/nagios.cfg  /usr/local/nagios/etc/ 
        cp /usr/src/nagios-3.2.1/sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
        echo "请设置页面登入密码，按回车设置"
        read 
        htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
        /etc/init.d/nagios start &>/dev/null
        service  httpd restart &>/dev/null
}
#安装被监控端主机
ggg (){
        echo "----------安装中"
        useradd nagios  &>/dev/null
        groupadd nagcmd &>/dev/null
        usermod -G nagcmd nagios &>/dev/null
        unzip $NAGIOSzip &>/dev/dull
        cd $NAGIOS
        tar -zxf nagios-plugins-1.4.14.tar.gz
        cd nagios-plugins-1.4.14
        ./configure &>/dev/null
        configure_err
        make      &>/dev/null
        make_err
        make install    &>/dev/null
        make_install_err
        cd ..
        tar -zxf nrpe-2.12.tar.gz
        cd nrpe-2.12
        ./configure &>/dev/null
        configure_err
        make      &>/dev/null
        make_err
        make install    &>/dev/null
        make_install_err
        make install-plugin &>/dev/null
        make install-daemon  &>/dev/null
        make install-daemon-config  &>/dev/null
        make install-xinetd  &>/dev/null
        yum install -y telnet-server &>/dev/null
        read -p "-----请输入监控端的ip-----  : " ip
        sed -i '/only_from/s/$/& "$ip"/' /etc/xinetd.d/nrpe
        grep -q nrpe /etc/services || \
        sed -i '$a\nrpe            5666/tcp ' /etc/services
        /etc/init.d/xinetd restart &>/dev/null
}

while :
do
clear
menu
        case $select in 
        1)
                YUMREPO
                yilai_install
                xiugai_httpd
                nagios_install
                plugins
                abc
                nrpe_install
                echo -e "3[32mOK,按回车继续3[0m"
                read 
                ;;
        2)
                ggg
                echo -e "3[32mOK,按回车继续3[0m"
                read
                ;;
        3)
                exit 0
                ;;
        *)
                echo "输入有误"
                ;;
        esac
done
1.此脚本在多台机器上测试成功。
2.nagios版本是nagios-3.2.1版本跑在httpd上
3.访问时：
      输入:  ip/nagios
4.页面用httpd的密码工具生成用户密码，用户是nagiosadmin(脚本里设置的，可自己改)。
5.弹出自己输入密码
6.脚本可能还有瑕疵,不知道依赖包考虑的是不是 完全.
7. naios.zip文件10M ，传不上来。上传到百度云里。有兴趣的可以下载，并在自己虚拟机上运行一次看下效果
下载地址：http://pan.baidu.com/s/1slJ5GIT      密码nexl8.脚本运行使用
   当需要远程监控一台机器时,先在被监控端运行2,然后再监控端运行3.
这是运行1大概 的过程------------
  ##############----一键安装菜单----##############
# 1. 安装nagios 监控端
# 2. 安装远程被监控端
#3.监控端修改被监控端文件
#4. 退出
请输入菜单【1-4】1
正在检测yum源yum源检测通过!
----------正在安装依赖包
----------依赖安装完成
----------安装nagios
----------编译中
请设置页面登入密码，按回车设置

New password:
Re-type new password:
Adding password for user nagiosadmin
OK,按回车继续