Nagios (centreon) monitors Linux logs

Nagios (centreon) monitors Linux logs

1. Download check_log3.pl and put it in the plug-in folder of the client server.
[Root @ SSAVL2475 libexec] # cp/tmp/check_log3.pl/usr/local/nagios/libexec

2. Add execution permission # chmod + x check_log3.pl
[Root @ SSAVL2475 libexec] # chmod + x check_log3.pl

3. Modify the owner # chown nagios. nagios check_log3.pl
[Root @ SSAVL2475 libexec] # chown nagios. nagios check_log3.pl

4. Run check_log3.pl to check whether the task is executable. If the pm file is missing, install the corresponding perl module.
Check_linux_stats.pl has been installed before. No error is reported here.
[Root @ SSAVL2475 libexec] #./check_log3.pl-h

[Root @ SSAVL2475 libexec] #./check_log3.pl-h
This is check_log3.pl version 3.11b
.......
5. Test the monitoring message. The following command is a line that scans the Error or error keywords in messages. Multiple keywords are separated by '| '.
Put check_log3 in/usr/local/nagios/libexec:
Root runs directly. No problem.
[Root @ SSAVL2475 libexec] #/usr/local/nagios/libexec/check_log3.pl-l/var/log/messages-p '[Ee] rror'-n nrpe
OK: Found 0 lines (limit = 1/0): No matches found. | lines = 0
[Root @ SSAVL2475 libexec] #
However, the following error occurs in sudo-u nagios:
Sudo-u nagios/usr/local/nagios/libexec/check_log3.pl-l/var/log/messages-p '[Ee] rror'-n nrpe
 
[Root @ SSAVL2475 libexec] # sudo-u nagios/usr/local/nagios/libexec/check_log3.pl-l/var/log/messages-p' [Ee] rror '-n nrpe
Unable to open '/var/log/messages': Permission denied

The following settings must be made in/etc/sudoers:
[Root @ SSAVL2475 libexec] # mongodo
# Zhailiang
Defaults requiretty
Nagios ALL = (ALL) NOPASSWD:/usr/local/nagios/libexec/check_log3.pl

 

Test:
[Nagios @ SSAVL2475 libexec] $ sudo./check_log3.pl-l/var/log/messages-p '[Ee] rror'-n nrpe
OK: Found 0 lines (limit = 1/0): No matches found. | lines = 0

[Root @ SSAVL2475 libexec] #./check_nrpe-H 127.0.0.1-c check_log
OK: Found 0 lines (limit = 1/0): No matches found. | lines = 0

[Nagios @ SSAVL2475 ~] $ Sudo/usr/local/nagios/libexec/check_log3.pl-l/var/log/messages-p '[Ee] rror'-n nrpe
OK: Found 0 lines (limit = 1/0): No matches found. | lines = 0

 

6. Add nrpe. cfg after the test is correct.
Command [check_log] =/usr/bin/sudo/usr/local/nagios/libexec/check_log3.pl-l/var/log/messages-p' [Ee] rror '-n nrpe

7. Restart xinetd
8 test the check_nrpe command from poller:
[Root @ SSAVL2521 plugins] #./check_nrpe-H 10.90.27.8-c check_log
OK: Found 0 lines (limit = 1/0): No matches found. | lines = 0
[Root @ SSAVL2521 plugins] #
The result is verified normally and can be operated on the centreon console.

9. added the centreon service monitoring template to add log monitoring to related servers.

This script can monitor various other application logs. If you are interested, you can perform further research.

Check_log3.pl script:

Https://exchange.nagios.org/directory/Plugins/Log-Files/check_log3-2Epl/details

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