Nagios Support Forum

After I restart nagios services, XI System Component Status got Monitoring Engine Status Error

I click on error, it prompt "nagios.lock" not find.

I ssh the server and find nagios.lock are existing

How to fix it?

Hello and welcome to the forum!

What version of Nagios XI are you running?

Can you also show the output of the following commands:

The problem seems hit by the following httpd configuration

ServerTokens Prod
ServerSignature On
FileETag None
TraceEnable off
Header always append X-Frame-Options SAMEORIGIN
Header set X-XSS-Protection "1; mode=block"
RewriteEngine On
RewriteCond %{THE_REQUEST} !HTTP/1.1$
RewriteRule .* - [F]

After I comment out the following configuration
problem resolved

##RewriteEngine On
##RewriteCond %{THE_REQUEST} !HTTP/1.1$
##RewriteRule .* - [F]


Any idea??

scottwilkerson wrote:Hello and welcome to the forum!

What version of Nagios XI are you running?

Can you also show the output of the following commands:

Code: Select all

ps -ef|grep nagios.cfg
ll /var/run/nagios.lock
grep nag /etc/group
chage -l nagios

[root@ngonap01 conf]# ps -ef|grep nagios.cfg
nagios 1412 1 2 11:06 ? 00:00:00 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
nagios 1499 1412 0 11:06 ? 00:00:00 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
root 2965 18595 0 11:06 pts/0 00:00:00 grep nagios.cfg
[root@ngonap01 conf]# ll /var/run/nagios.lock
ls: cannot access /var/run/nagios.lock: No such file or directory

[root@ngonap01 conf]# grep nag /etc/group
nagios501:nagios,apache,snmptt
nagcmd502:nagios,apache,snmptt
[root@ngonap01 conf]# chage -l nagios
Last password change : May 07, 2015
Password expires : never
Password inactive : never
Account expires : never
Minimum number of days between password change : 0
Maximum number of days between password change : 99999
Number of days of warning before password expires : 7

kenntun wrote:After I comment out the following configuration
problem resolved

##RewriteEngine On
##RewriteCond %{THE_REQUEST} !HTTP/1.1$
##RewriteRule .* - [F]


Any idea??

What was this configuration attempting to do?

To disable un-used HTTP Protocol after our security teams perform security scanning on nagios

It appears you were likely rewriting the JS calls to the backend to get the status.