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benjaminsmith
Posts: 5324Joined: Wed Aug 22, 2018 4:39 pmLocation: saint paul
Post by benjaminsmith Tue Jul 20, 2021 5:14 pm
Hi,
I spun up test system running Cent 8 and installed the Linux Agent (see:
https://assets.nagios.com/downloads/nag ... _Agent.pdf ) and I'm not able to repeat the error.
On the remote host side, here is my check command in nrpe.cfg.
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command[check_service]=/usr/local/nagios/libexec/check_init_service $ARG1$
I'm testing this against the cron service without any troubles.
[root@localhost libexec]# ./check_nrpe -H 192.168.8.94
Can you send over the NRPE.cfg file and provide the step you used to install NRPE and I can try to replicate this on my end. Thanks, Benjamin
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HIINNS
Posts: 172Joined: Wed Mar 14, 2018 9:43 am
Post by HIINNS Wed Jul 21, 2021 4:44 am
I was able to install NRPE by running a nrpe.tar.gz file found in my "Error getting NRPE to install on Rewdhat 8" case. The nrpe.cfg file was posted previous to this.
benjaminsmith
Posts: 5324Joined: Wed Aug 22, 2018 4:39 pmLocation: saint paul
Post by benjaminsmith Wed Jul 21, 2021 2:29 pm
HI,
Okay, just to confirm, did you follow the instructions below? Those are the official docs, I recommend following the guide below. NRPE is very mature open-source application so there are quite a few online tutorials, some good and some out of date.
https://support.nagios.com/kb/article/n ... .html#RHEL
I looked over the NRPE.CFG file, you'll need to add the command definition to this file. On the remote server, open this file up add add the following under #COMMAND DEFINITIONS.
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command[check_init_service]=sudo /usr/local/nagios/libexec/check_init_service $ARG1$
Restart NRPE,
systemctl restart nrpe , and then test once more.
For more details on the process, please refer to the following kb article.
NRPE - Agent and Plugin Explained
Let me know if it's working now.
--Benjamin
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HIINNS
Posts: 172Joined: Wed Mar 14, 2018 9:43 am
Post by HIINNS Thu Jul 22, 2021 4:48 am
Benjamin, nrpe does not run as a service. It is run under xi netd.
HIINNS
Posts: 172Joined: Wed Mar 14, 2018 9:43 am
Post by HIINNS Thu Jul 22, 2021 6:25 am
Added command[check_init_service]=sudo /usr/local/nagios/libexec/check_init_service $ARG1$ to nrpe..cfg. Restarted the xi netd service. Still get the same error.
benjaminsmith
Posts: 5324Joined: Wed Aug 22, 2018 4:39 pmLocation: saint paul
Post by benjaminsmith Thu Jul 22, 2021 2:17 pm
Hi HIINNS,
If you installed it from the source, it would be configured as a standalone service and not running under
xi netd. What is the output of the following command?
Let's turn on debug mode to see if we can get some details on why it's not able to run the check. Open up nrpe.cfg on the remote host and set the following values.
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# LOG FILE
# If a log file is specified in this option, nrpe will write to
# that file instead of using syslog.
log_file=/usr/local/nagios/var/nrpe.log
# DEBUGGING OPTION
# This option determines whether or not debugging messages are logged to the
# syslog facility.
# Values: 0=debugging off, 1=debugging on
debug=1
Then run the check again from the
xi server and post the /usr/local/nagios/var/nrpe.log to the ticket.
Thanks,
Benjamin
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benjaminsmith
Posts: 5324Joined: Wed Aug 22, 2018 4:39 pmLocation: saint paul
Post by benjaminsmith Thu Jul 22, 2021 2:48 pm
Hi,
I reached out to another team member and there's a chance the check_init_service is not compatible with systemctl, so we'd like to check that.
Log into the remote system, and run the following commands and post the output.
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su - nagios
/usr/local/nagios/libexec/check_init_service crond
Then attach the following file to the thread. Thanks for your cooperation.
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/usr/local/nagios/libexec/check_init_service
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HIINNS
Posts: 172Joined: Wed Mar 14, 2018 9:43 am
Post by HIINNS Fri Jul 23, 2021 7:33 am
cat /etc/xi netd.d/nrpexi IP.
ssax
Dreams In Code
Posts: 7682Joined: Wed Feb 11, 2015 12:54 pm
Post by ssax Mon Jul 26, 2021 12:32 pm
What does
/var/log/messages or
/var/log/syslog show on the remote system when you run the check through nrpe?
Does calling it without any arguments work?
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/usr/local/nagios/libexec/check_nrpe -H X.X.X.X
Change your check command to this:
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command[check_init_service]=sudo /usr/local/nagios/libexec/check_init_service $ARG1$ 2>&1
Then run the check again and send the full output:
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/usr/local/nagios/libexec/check_nrpe -H <Red Hat 8 client> -t 30 -c check_init_service -a 'crond'
What is the output of these commands on the remote system?
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ps aux | grep nrpe
find / -name nrpe.cfg
HIINNS
Posts: 172Joined: Wed Mar 14, 2018 9:43 am
Post by HIINNS Tue Jul 27, 2021 6:29 am
Jul 27 05:17:19 nagclient audisp-syslog[1483]: node=nagclient type=PROCTITLE msg=audit(1627377439.495:231386461): proctitle="(systemd)"xi t=14 a0=f a1=561bfea9e7d1 a2=2a0000 a3=0 items=1 ppid=1 pid=1251959 auid=7887 uid=7887 gid=400 euid=7887 suid=7887 fsuid=7887 egid=400 sgid=400 fsgid=400 tty=(none) ses=13396 comm="systemd" exe="/usr/lib/systemd/systemd" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="successful-access" ARCH=x86_64 SYSCALL=openat AUID="mylogin" UID="mylogin" GID="nagroup" EUID="mylogin" SUID="mylogin" FSUID="mylogin" EGID="nagroup" SGID="nagroup" FSGID="nagroup"xi t=15 a0=e a1=561bfea9e7d1 a2=2a0000 a3=0 items=1 ppid=1 pid=1251959 auid=7887 uid=7887 gid=400 euid=7887 suid=7887 fsuid=7887 egid=400 sgid=400 fsgid=400 tty=(none) ses=13396 comm="systemd" exe="/usr/lib/systemd/systemd" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="successful-access" ARCH=x86_64 SYSCALL=openat AUID="mylogin" UID="mylogin" GID="nagroup" EUID="mylogin" SUID="mylogin" FSUID="mylogin" EGID="nagroup" SGID="nagroup" FSGID="nagroup"xi serverxi serverxi netd.xi /linux-nrpe-agent/subcomponents/nrpe/mods/cfg/nrpe.cfg