Centos 日志處理

今天檢查系統日志發現有，日志中都是以下格式的日志：

Apr 22 09:26:26 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=14006 duration=0(sec)

Apr 22 09:26:27 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=14316 duration=1(sec)

Apr 22 09:26:27 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=14323 duration=1(sec)

Apr 22 09:26:27 jsmapp4 xinetd[3158]: START: nrpe pid=15937 from=::ffff:192.168.1.60

Apr 22 09:26:27 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=15937 duration=0(sec)

Apr 22 09:27:19 jsmapp4 pptp[27991]: anon log[logecho:pptp_ctrl.c:677]: Echo Reply received.

Apr 22 09:27:26 jsmapp4 xinetd[3158]: START: nrpe pid=7318 from=::ffff:192.168.1.60

Apr 22 09:27:26 jsmapp4 xinetd[3158]: START: nrpe pid=7327 from=::ffff:192.168.1.60

Apr 22 09:27:26 jsmapp4 xinetd[3158]: START: nrpe pid=7332 from=::ffff:192.168.1.60

Apr 22 09:27:26 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=7318 duration=0(sec)

Apr 22 09:27:26 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=7327 duration=0(sec)

Apr 22 09:27:26 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=7332 duration=0(sec)

Apr 22 09:27:26 jsmapp4 xinetd[3158]: START: nrpe pid=7652 from=::ffff:192.168.1.60

Apr 22 09:27:26 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=7652 duration=0(sec)

Apr 22 09:27:27 jsmapp4 xinetd[3158]: START: nrpe pid=8952 from=::ffff:192.168.1.60

Apr 22 09:27:27 jsmapp4 xinetd[3158]: EXIT: nrpe status=0 pid=8952 duration=0(sec)

通過分析以上日志發現：

xinetd是新一代的網絡守護進程服務程序，又叫超級Internet服務器,常用來管理多種輕量級Internet服務。

這個進程來自于192.168.1.60這個ip，明顯是內網ip，以前沒有發現這個問題，奇怪。

去60這臺服務器查看發現，有nagios警告的日志：

Apr 22 09:50:02 jsmbak1 nagios: Warning: The check of host 'jsmapp1' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the host...

Apr 22 09:50:24 jsmbak1 nagios: Warning: The check of service 'check_mem' on host 'jsmapp4' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the service...

Apr 22 09:51:02 jsmbak1 nagios: Warning: The check of service 'Current Load' on host 'Nagios-Server' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the service...

Apr 22 09:51:02 jsmbak1 nagios: Warning: The check of service 'SSH' on host 'Nagios-Server' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the service...

Apr 22 09:51:02 jsmbak1 nagios: Warning: The check of service 'Total Processes' on host 'Nagios-Server' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the service...

Apr 22 09:51:02 jsmbak1 nagios: Warning: The check of service 'HTTP' on host 'jsmapp2' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the service...

Apr 22 09:51:02 jsmbak1 nagios: Warning: The check of service 'HTTP' on host 'jsmapp3' looks like it was orphaned (results never came back).  I'm scheduling an immediate check of the service...

Apr 22 09:51:46 jsmbak1 xinetd[16796]: START: nrpe pid=17625 from=::ffff:127.0.0.1

Apr 22 09:51:46 jsmbak1 xinetd[16796]: EXIT: nrpe status=0 pid=17625 duration=0(sec)

Apr 22 09:52:50 jsmbak1 xinetd[16796]: START: nrpe pid=17890 from=::ffff:127.0.0.1

Apr 22 09:52:50 jsmbak1 xinetd[16796]: EXIT: nrpe status=0 pid=17890 duration=0(sec)

Nagios是一款開源的免費網絡監視工具，能有效監控Windows、Linux和Unix的主機狀態、交換機、路由器等網絡設置，打印機等。

Nagios 可以監控的功能有： 

1、監控網絡服務（SMTP、POP3、HTTP、NNTP、PING等）；

2、監控主機資源（處理器負荷、磁盤利用率等）；

3、簡單地插件設計使得用戶可以方便地擴展自己服務的檢測方法；

4、并行服務檢查機制；

5、具備定義網絡分層結構的能力，用"parent"主機定義來表達網絡主機間的關系，這種關系可被用來發現和明晰主機宕機或不可達狀態；

6、當服務或主機問題產生與解決時將告警發送給聯系人（通過EMail、短信、用戶定義方式）；

7、具備定義事件句柄功能，它可以在主機或服務的事件發生時獲取更多問題定位；

8、自動的日志回滾；

9、可以支持并實現對主機的冗余監控；

10、可選的WEB界面用于查看當前的網絡狀態、通知和故障歷史、日志文件等；

查看nagios進程發現，有多個進程

[root@jsmbak1 ~]# ps -ef|grep "bin/nagios"

root      4913  4095  0 11:12 pts/2    00:00:00 grep bin/nagios

nagios    5146     1  0 Feb18 ?        01:12:40 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

nagios    5286     1  0 Feb19 ?        01:15:13 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

nagios    9767     1  0 Feb18 ?        01:13:52 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

使用[nagios@jsmbak1 ~]$ killall nagios，殺掉所有nagios，然后重啟

/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

如果想停止nrpe服務在xinetd下的日志輸出

修改配置文件，禁用成功狀態下的日志

[root@jsmapp3 tomcat]# vi /etc/xinetd.conf

# Define general logging characteristics.

        log_type        = SYSLOG daemon info

        log_on_failure  = HOST

#       log_on_success  = PID HOST DURATION EXIT

重新服務xinetd后再次查看日志，不再出現nrpe相關日志

[root@jsmapp3 tomcat]# service xinetd restart

Stopping xinetd: [  OK  ]

Starting xinetd: [  OK  ]