- 自定义ip_conn.sh ：http://zhumeng8337797.blog.163.com/blog/static/100768914201171664928247/
用php自定义 nagios监控插件
http://blog.csdn.net/sudoers/article/details/6913368
Writing a Nagios plugin with PHP
http://benedmunds.com/2012/04/25/writing-a-nagios-plugin-with-php/
/etc/init.d/nagios stop
/etc/init.d/nagios start
============== 1 增加nginx和php的监控
-----------1.1 主
基本配置 /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/commands.cfg 图3定义commands
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg 联系人 图4
cfg_file=/usr/local/nagios/etc/objects/templates.cfg 模板 图5
cfg_file=/usr/local/nagios/etc/objects/localhost.cfg localhost.cfg中有类似的主机组设置
cfg_file=/usr/local/nagios/etc/objects/services.cfg
#vim /usr/local/nagios/etc/objects/commands.cfg
#check_php_test
define command{
command_name check_php_test
command_line $USER1$/check_php_test.sh -H $HOSTADDRESS$ -c $ARG1$ -t 30 # -t 30 # 加上一个 -t 30 指定限定时间为 30 秒
}
#vim /usr/local/nagios/etc/objects/services.cfg
define service{
use generic-service
host_name R620_web67,R620_web68
service_description check_php_test
contact_groups admins-ts
check_command check_nrpe!check_php_test
notifications_enabled 1
normal_check_interval 3
retry_check_interval 2
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
}
編輯完主Nagios後可以用這一行检查配置
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
检查配置：
#/etc/init.d/nagios checkconfig
reload服务：
#/etc/init.d/nagios reload
-----------1.2 从：
客户机基本配置/usr/local/nrpe/etc/nrpe.cfg
或者 /usr/local/nagios/etc/nrpe.cfg
#vim /var/www/t.php
1
#vim /usr/local/nagios/libexec/check_php_test.sh
#!/bin/bash
#!/bin/bash
r=`/usr/bin/curl -s http://localhost/t.php`
if [ $r ] ;then
if [ $r == "1" ] ;then
echo "ok"
exit 0
else
echo "Please confirm the content of the file(t.php)!"
exit 1
fi
fi
echo "Service exception,May be the file(t.php) does not exist!"
exit 2
----------------------------------------- nagios检测并重启服务完整脚本 check_php_test.sh
#!/bin/bash
#nagios默认state
nagstate=0
#nagios默认描述
nagrs="ok"
#检测服务
function checkService () {
r=`/usr/bin/curl -s http://localhost/t.php`
echo "curl content:$r"
if [ $r ] ;then
if [ $r -eq 1 ] ;then
nagstate=0
nagrs="OK"
return 1
else
nagstate=1
nagrs="Please confirm the content of the file(t.php)!"
return 1
fi
fi
nagstate=2
nagrs="Service exception,attempts to restart services,please pay attention to the following message!"
return 1
}
#重新拉起ngin, php服务
function restartService () {
#pid /dev/shm/pid/nginx.pid;
nginxPath="/usr/local/nginx/conf/nginx.conf"
#pid = /dev/shm/pid/php-fpm.pid
phpPath="/usr/local/php/etc/php-fpm.conf"
`sudo chmod +x $nginxPath`
`sudo chmod +x $phpPath`
nginxPid=`cat $nginxPath | grep "pid" | tr -d ";" |awk 'BEGIN {FS=" "}{print $2}' | awk '{gsub(/ /,"")}1'`
phpPid=`cat $phpPath | grep "pid" | awk 'BEGIN {FS="="}{print $2}' | awk '{gsub(/ /,"")}1'`
if [ -f $nginxPid ] ;then
echo "restart nginx"
sudo /bin/kill -HUP `sudo cat $nginxPid`
else
echo "start nginx"
`sudo chmod +x /usr/local/nginx/sbin/nginx`
`sudo /usr/local/nginx/sbin/nginx`
fi
if [ -f $phpPid ] ;then
echo "retart php"
sudo /bin/kill -USR2 `sudo cat $phpPid`
else
echo "starg php-fpm"
`sudo chmod +x /usr/local/php/sbin/php-fpm`
`sudo /usr/local/php/sbin/php-fpm`
fi
return 1
}
#创建t.php文件
function toucthTphp () {
wwwTphp="/var/www/ssc/www/t.php"
htmlTphp="/var/www/html/t.php"
[ -d "/var/www/ssc/www" ] && `sudo chmod -R 777 /var/www/ssc/www/`;echo 1 > $wwwTphp
[ -d "/var/www/html" ] && `sudo chmod -R 777 /var/www/html/`;echo 1 > $htmlTphp
return 1
}
### 主程序###
function main () {
toucthTphp
checkService
[ $nagstate -ne 0 ] && restartService
checkService
return 1
}
main
echo $nagrs
exit $nagstate
------------------------ nagios的sudo需要手动输入密码问题
su - nagios
sudo /etc/init.d/sshd restart
需要输入密码
修改：
su -
#visudo （或者sudo vi /etc/sudoers ）
#添加nagios 请求sudo，允许特定指令时（可跟参数），不需要密码 。
nagios ALL=(ALL) NOPASSWD: /etc/init.d/sshd restart
#找到 #Defaults requiretty 并取消注释，另外新增一行。表示nagios用户不需要登陆终端就可以调用命令 。
Defaults requiretty
Defaults:nagios !requiretty
su - nagios
sudo /etc/init.d/sshd restart
就不需要输入密码了
---------------------------------------END 检测并重启服务脚本
nrpe.cfg定义command: check_php_test （如果缺少此步骤，在服务器端执行会提示NRPE: Command 'check_php_test' not defined）
#vim /usr/local/nagios/etc/nrpe.cfg
command[check_php_test]=/usr/local/nagios/libexec/check_php_test.sh
重启nrpe：
#/etc/init.d/xinetd restart
报错：NRPE: Unable to read output （页面上nagios的文字描述就是通过echo获取到的）
客户端脚本要有输出内容
echo "ok"
exit 0
****修改sh文件不需要重启任何服务
-----------1.3 主： 配置邮件联系人
#vim /usr/local/nagios/etc/objects/contacts.cfg
define contactgroup {
contactgroup_name admins-ts
alias Nagios Administrators
members it-ts
}
define contact {
contact_name it-ts ; Short name of user
use generic-contact ; Inherit default values from generic-contact template (defined abov
e)
alias sy.zed ; Full name of user
email [email protected] ;#最终的邮件组
pager 1
}
host_name设置
#vim /usr/local/nagios/etc/objects/localhost.cfg
define host {
host_name R620_web67
alias Linux R620_web67
address 192.168.102.67
contact_groups admins-ts
check_command check-host-alive
notifications_enabled 1
process_perf_data 1
max_check_attempts 5
notification_interval 10
notification_period 24x7
notification_options d,u,r
action_url /nagios/pnp/index.php?host=$HOSTNAME$
parents TW_TS
}
----------- 1.4验证
在监控机上运行check_nrpe -H IP
可以查看到客户端的nrpe信息，说明监控机与被监控机的nrpedaemon通信是正常。
在服务器端：验证
/usr/local/nagios/libexec/check_nrpe -H 192.168.102.67 -c check_php_test
nagios页面查看 ：
Hostgroup Overview -> R620_web67 -> check-php-test
----------其他：php方式简述
#check_php_test
define command{
command_name check_php_test
command_line php $USER1$/check_php_test.php -H $HOSTADDRESS$ -c $ARG1$ -t 60
}
#vim /usr/local/nagios/libexec/check_php_test.php
error_reporting(0);
#fwrite(STDOUT, 'This check passed');
try{
$r = url_get_contents("http://localhost/t.php");
if ( false === $r || '1' != $r) {
exit(2);
}
} catch(Exception $e) {
exit(3);
}
exit(0);
function url_get_contents($strUrl, $boolUseCookie=false)
{
$ch = curl_init($strUrl);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPGET, true);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_REFERER, $_SERVER['HTTP_REFERER']);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
if ($boolUseCookie && is_array($_COOKIE) && count($_COOKIE) > 0) {
$cookie_str = '';
foreach($_COOKIE as $key => $value) {
$cookie_str .= "$key=$value; ";
}
curl_setopt($ch, CURLOPT_COOKIE, $cookie_str);
}
$response = curl_exec($ch);
if (curl_errno($ch) != 0) {
return false;
}
curl_close($ch);
return $response;
}
==============2 ip_conn.sh
客户端/usr/local/nrpe/etc/nrpe.cfg
或者 /usr/local/nagios/etc/nrpe.cfg
command[check_ips]=/usr/local/nrpe/libexec/ip_conn.sh 8000 10000
vim /usr/local/nrpe/libexec/ip_conn.sh
#!/bin/sh
#if [ $# -ne 2 ]
# echo "Usage:$0 -w num1 -c num2"
#exit 3
#fi
ip_conns=`nestat -an | grep tcp |grep EST |wc -l`
if [ $ip_conns -lt $1 ]
then
echo "OK -connect counts is $ip_conns"
exit 0
fi
if [ $ip_conns -gt $1 -a $ip_conns -lt $2 ]
then
echo "Warning -connect counts is $ip_conns"
exit 1
fi
if [ $ip_conns -gt $2 ]
then
echo "Critical -connect counts is $ip_conns"
exit 2
fi
#指定2个连接数，当连接数大于指定的第一个数的时候，给予warning警报，当连接数大于指定的第二个数的时候，给予Critical警报。
各客户端测试nrpe服务中各个插件的功能
[root@nagios-server libexec]# /usr/local/nrpe/libexec/ip_conn.sh 8000 10000
/usr/local/nrpe/libexec/ip_conn.sh: line 6: nestat: command not found
OK -connect counts is 0
服务端测试check_nrpe功能
[root@nagios-server libexec]# ./check_nrpe -H nagios-server -c check_ips
OK -connect counts is 0
各机器以独立守护进程启动nrpe服务
/usr/local/nrpe/bin/nrpe -c /usr/local/nrpe/etc/nrpe.cfg -d
服务器端启动nagios监控服务
/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
启动apache服务器
/usr/local/apache/bin/apachectl -k start