check_mrtgtraf: Unable to open MRTG log file

[ramil85]

Hi.
I have installed MRTG. MRTG graphs appear nominal when i open on browser: localhost/mrtg

nagios on web interface give error

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check_mrtgtraf: Unable to open MRTG log file

command:

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sudo -u nagios /usr/lib64/nagios/plugins/check_mrtgtraf -F /var/lib/mrtg/192.168.5.1_15.log -a AVG -w 1000000,1000000 -c 5000000,5000000 -e 10

give same error

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check_mrtgtraf: Unable to open MRTG log file
Usage check_mrtgtraf -F <log_file> -a <AVG|MAX> -w <warning_pair> -c <critical_pair> [-e expire_minutes]

i set 777 permission to all files in /var/lib/mrtg/ but it didnt solved issue. Same error.

OS: centos 6.5
version: nagios 3.x

What might be the reason of this issue?

[ssax]

Please post the output of the following:

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ls -ld /var/lib/mrtg

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ls -l /var/lib/mrtg

[ramil85]

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ls -ld /var/lib/mrtg

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drwxrwxrwx. 2 root root 4096 Feb 26 20:44 /var/lib/mrtg

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ls -l /var/lib/mrtg

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-rwxrwxrwx. 1 root 48408 Feb 26 20:45 192.168.5.1_15.log
-rwxrwxrwx. 1 root 48408 Feb 26 20:45 192.168.5.1_15.log
-rwxrwxrwx. 1 root root 0 Feb 26 21:33 mrtg.ok

[ssax]

Are there really 2 files with the same name in that last one or was it a posting error?

If it wasn't a mistake, please post the output of the following:

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ls -lab /var/lib/mrtg

If that doesn't show any differences then you may be hitting this bug: http://superuser.com/a/641118

[ramil85]

Are there really 2 files with the same name in that last one or was it a posting error?

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ls -lab /var/lib/mrtg

yes it was posting mistake:
but now i see that is permissions changed from 777 to 644. It seems that MRTG overwriting files permission.

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drwxrwxrwx.  2 root root  4096 Feb 26 21:39 .
drwxr-xr-x. 33 root root  4096 Feb 26 03:12 ..
-rw-r--r--.  1 root root 48428 Feb 26 21:39 192.168.5.1_15.log
-rw-r--r--.  1 root root 48426 Feb 26 21:38 192.168.5.1_15.old
-rwxrwxrwx.  1 root root     0 Feb 26 21:39 mrtg.ok

[ssax]

And you did run the cfgmaker command configured to your html directory where the mrtg html files reside?

Example:

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cfgmaker --global 'WorkDir: /var/www/html/mrtg' --global 'Options[_]: bits,growright' --output /etc/httpd/conf/mrtg.cfg public@192.168.1.15

If you go into the web interface > Services > Click on the mrtg service, what does it say exactly under Status Information and Performance Data?