nagios-event-triger-AutoRecover
10余年的淮南網站建設經驗,針對設計、前端、開發(fā)、售后、文案、推廣等六對一服務,響應快,48小時及時工作處理。營銷型網站的優(yōu)勢是能夠根據用戶設備顯示端的尺寸不同,自動調整淮南建站的顯示方式,使網站能夠適用不同顯示終端,在瀏覽器中調整網站的寬度,無論在任何一種瀏覽器上瀏覽網站,都能展現(xiàn)優(yōu)雅布局與設計,從而大程度地提升瀏覽體驗。創(chuàng)新互聯(lián)公司從事“淮南網站設計”,“淮南網站推廣”以來,每個客戶項目都認真落實執(zhí)行。
思路:
use NRPE to execute the necessary commands on the remote hosts
In order to adapt the scheme from the Nagios docs to work on remote servers as well three things need to be done:
1.The command that is executed by the event handler script should be changed to use NRPE
2.On the remote machine the nagios user (under which the NRPE service is running) should be given some sudo rights so that it is actually allowed to start a service.
3.The NRPE configuration on the remote machine should of course be changed to include the new command(s) for starting services.
1. nagios manage server
(1)vi localhost.cfg
define service{ use generic-service host_name test2.bigdata.com service_description gmond check_command check_nrpe_eventhandler!check_gmond notifications_enabled 1 notification_interval 0 max_check_attempts 4 event_handler restart-service!gmond } define service{ use generic-service host_name test2.bigdata.com service_description MySQLd check_command check_nrpe_eventhandler!check_mysqld notifications_enabled 1 notification_interval 0 max_check_attempts 5 event_handler restart-service!mysqld }
(2)vi commands.cfg
define command{ command_name check_nrpe_eventhandler command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -t 40 -c $ARG1$ } define command { command_name restart-service command_line $USER1$/eventhandlers/event_handler_script.sh $SERVICESTATE$ $SERVICESTATETYPE$ $SERVICEATTEMPT$ $HOSTADDRESS$ $ARG1$ $SERVICEDESC$ }
利用后面編寫的通用的事件處理腳本模塊文件 /usr/local/nagios/libexec/eventhandlers/event_handler_script.sh 傳遞監(jiān)控服務所需的參數(shù)$ARG1$
2. on remote machine with NRPE running
(1)vi nrpe.cfg
command[check_gmond]=/usr/local/nagios/libexec/check_gmond command[restart_gmond]=/usr/bin/sudo /etc/init.d/gmond restart command[check_mysqld]=/usr/local/nagios/libexec/check_mysqld command[restart_mysqld]=/usr/bin/sudo /usr/local/nagios/libexec/restart_mysqld
(2)edit your service manage script on remote machine.
/usr/local/nagios/libexec/check_mysqld
/usr/local/nagios/libexec/restart_mysqld
3. 通用的事件處理腳本模塊文件 /usr/local/nagios/libexec/eventhandlers/event_handler_script.sh內容如下
#!/bin/sh # # Event handler script for restarting the web server on the local machine # # Note: This script will only restart the web server if the service is # retried 3 times (in a "soft" state) or if the web service somehow # manages to fall into a "hard" error state. # update 2015/10/23 # version: 0.2 date=`date` # What state is the HTTP service in case "$1" in OK) # The service just came back up, so don't do anything... ;; WARNING) # We don't really care about warning states, since the service is probably still running... ;; UNKNOWN) # We don't know what might be causing an unknown error, so don't do anything... ;; CRITICAL) # We don't really care about warning states, since the service is probably still running... # Aha! The HTTP service appears to have a problem - perhaps we should restart the server... # Is this a "soft" or a "hard" state? case "$2" in # We're in a "soft" state, meaning that Nagios is in the middle of retrying the # check before it turns into a "hard" state and contacts get notified... SOFT) # What check attempt are we on? We don't want to restart the web server on the first # check, because it may just be a fluke! case "$3" in # Wait until the check has been tried 3 times before restarting the web server. # If the check fails on the 4th time (after we restart the web server), the state # type will turn to "hard" and contacts will be notified of the problem. # Hopefully this will restart the web server successfully, so the 4th check will # result in a "soft" recovery. If that happens no one gets notified because we # fixed the problem! 3) echo -n "Restarting service $6 (3rd soft critical state)...\n" # Call NRPE to restart the service on the remote machine /usr/local/nagios/libexec/check_nrpe -H $4 -c restart_$5 echo "$date -restart $6 on server $4 -at retry $3 times -SOFT" >> /tmp/eventhandlers ;; esac ;; # The HTTP service somehow managed to turn into a hard error without getting fixed. # It should have been restarted by the code above, but for some reason it didn't. # Let's give it one last try, shall we? # Note: Contacts have already been notified of a problem with the service at this # point (unless you disabled notifications for this service) HARD) echo -n "Restarting $6 service...\n" # Call the init script to restart the NRPE server echo "$date -restart $6 on server $4 -at retry $3 times -HARD" >> /tmp/eventhandlers /usr/local/nagios/libexec/check_nrpe -H $4 -c restart_$5 ;; esac ;; esac exit 0