[Bug] Munin-node fails to start when 'host *' is set in munin-node.conf #1641

leemgs · 2024-12-31T09:28:53Z

Describe the bug
The host * in /etc/munin/munin-node.conf can cause errors in munin-node.

I downloaded munin/munin-node from ubuntu 24.04 as shown below and installed it after compiling.
Unfortunately, the “host *” statement in the munin-node.conf file is causing munin-node to fail to run properly.

https://github.com/munin-monitoring/munin/blob/master/etc/munin-node.conf.PL#L81

Munin-node uses a Perl module called Net::Server internally to handle network connections. In the Net::Server module, the host setting must explicitly specify a specific IP address or hostname. When Net::Server actually interprets the * wildcard, it repeatedly attempts to bind all available network interfaces on the system. This process can result in crashes or errors.

To Reproduce
Steps to reproduce the behavior:

sudo apt install munin-node
sudo vi /etc/default/munin-node
DAEMON_ARGS="--config /etc/munin/munin-node.conf"
vi /etc/munin/munin-node.conf
host *
sudo systemctl start munin-node
sudo systemctl status munin-node
See below errors


root@u2404:/etc/munin# sudo systemctl start  munin-node
Job for munin-node.service failed because the control process exited with error code.
See "systemctl status munin-node.service" and "journalctl -xeu munin-node.service" for details.
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# sudo systemctl status munin-node
× munin-node.service - Munin Node
     Loaded: loaded (/usr/lib/systemd/system/munin-node.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Tue 2024-12-31 18:22:04 KST; 1s ago
   Duration: 4min 50.784s
       Docs: man:munin-node(1)
             http://guide.munin-monitoring.org/en/stable-2.0/reference/munin-node.html
    Process: 280164 ExecStartPre=/usr/bin/install -o munin -g munin -d /run/munin (code=exited, status=0/SUCCESS)
    Process: 280166 ExecStart=/usr/sbin/munin-node --foreground $DAEMON_ARGS (code=exited, status=1/FAILURE)
   Main PID: 280166 (code=exited, status=1/FAILURE)
        CPU: 140ms

12월 31 18:22:04 u2404 systemd[1]: munin-node.service: Scheduled restart job, restart counter is at 5.
12월 31 18:22:04 u2404 systemd[1]: munin-node.service: Start request repeated too quickly.
12월 31 18:22:04 u2404 systemd[1]: munin-node.service: Failed with result 'exit-code'.
12월 31 18:22:04 u2404 systemd[1]: Failed to start munin-node.service - Munin Node.
root@u2404:/etc/munin#

Expected behavior
When running the sudo systemctl status munin-node command, it should be listed as “Active”.

root@u2404:/etc/munin# sudo systemctl status munin-node
● munin-node.service - Munin Node
     Loaded: loaded (/usr/lib/systemd/system/munin-node.service; enabled; preset: enabled)
     Active: active (running) since Tue 2024-12-31 18:17:09 KST; 4min 45s ago
       Docs: man:munin-node(1)
             http://guide.munin-monitoring.org/en/stable-2.0/reference/munin-node.html
    Process: 275353 ExecStartPre=/usr/bin/install -o munin -g munin -d /run/munin (code=exited, status=0/SUCCESS)
   Main PID: 275361 (munin-node)
      Tasks: 1 (limit: 38284)
     Memory: 8.6M (peak: 11.1M)
        CPU: 143ms
     CGroup: /system.slice/munin-node.service
             └─275361 /usr/bin/perl -wT /usr/sbin/munin-node --foreground --config /etc/munin/munin-node.conf

Screenshots & Logs

cat /etc/munin/munin-node.conf  | grep "host "
host *

root@u2404:/etc/munin#
root@u2404:/etc/munin# sudo systemctl start  munin-node
Job for munin-node.service failed because the control process exited with error code.
See "systemctl status munin-node.service" and "journalctl -xeu munin-node.service" for details.
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# sudo systemctl start  munin-node
Job for munin-node.service failed because the control process exited with error code.
See "systemctl status munin-node.service" and "journalctl -xeu munin-node.service" for details.
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# sudo netstat -natp | grep 4949
root@u2404:/etc/munin#

Desktop (please complete the following information):
The following is system environment information to ensure that you can always reproduce it.
For example: Ubuntu version, munin package version, Linux kernel version, Net::Server module version


root@u2404:/etc/munin# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=24.04
DISTRIB_CODENAME=noble
DISTRIB_DESCRIPTION="Ubuntu 24.04.1 LTS"
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# munin-node --version
Version:
    This is munin-node v2.0.75

Copyright:
    Copyright (C) 2002-2006 Audun Ytterdal, Jimmy Olsen, and Tore Anderson /
    Linpro AS.

    This is free software; see the source for copying conditions. There is
    NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
    PURPOSE.

    This program is released under the GNU General Public License

root@u2404:/etc/munin# dpkg -l | grep munin
ii  munin                                          2.0.75-1ubuntu1                               all          network-wide graphing framework (grapher/gatherer)
ii  munin-common                                   2.0.75-1ubuntu1                               all          network-wide graphing framework (common)
ii  munin-doc                                      2.0.75-1ubuntu1                               all          network-wide graphing framework (documentation)
ii  munin-node                                     2.0.75-1ubuntu1                               all          network-wide graphing framework (node)
ii  munin-plugins-core                             2.0.75-1ubuntu1                               all          network-wide graphing framework (plugins for node)
ii  munin-plugins-extra                            2.0.75-1ubuntu1                               all          network-wide graphing framework (user contributed plugins for node)
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# uname -a
Linux u2404 6.8.0-51-generic #52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec  5 13:09:44 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# perl -MNet::Server -e 'print "$Net::Server::VERSION\n"'
2.014
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# cpan -D Net::Server
Reading '/root/.cpan/Metadata'
  Database was generated on Tue, 31 Dec 2024 05:41:02 GMT
Net::Server
-------------------------------------------------------------------------
        (no description)
        R/RH/RHANDOM/Net-Server-2.014.tar.gz
        /usr/share/perl5/Net/Server.pm
        Installed: 2.014
        CPAN:      2.014  up to date
        Paul Seamons (RHANDOM)
        [email protected]

root@u2404:/etc/munin#
root@u2404:/etc/munin#

Additional context
Welcome to any hints and comments. :)

The text was updated successfully, but these errors were encountered:

leemgs · 2024-12-31T09:32:02Z

Debug messages

root@u2404:/etc/munin#
root@u2404:/etc/munin# sudo systemctl start  munin-node
Job for munin-node.service failed because the control process exited with error code.
See "systemctl status munin-node.service" and "journalctl -xeu munin-node.service" for details.
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# sudo systemctl status  munin-node
* munin-node.service - Munin Node
     Loaded: loaded (/usr/lib/systemd/system/munin-node.service; enabled; preset: enabled)
     Active: activating (start) since Tue 2024-12-31 18:31:18 KST; 475ms ago
       Docs: man:munin-node(1)
             http://guide.munin-monitoring.org/en/stable-2.0/reference/munin-node.html
    Process: 288905 ExecStartPre=/usr/bin/install -o munin -g munin -d /run/munin (code=exited, status=0/SUCCESS)
   Main PID: 288907 (munin-node)
      Tasks: 1 (limit: 38284)
     Memory: 6.7M (peak: 6.7M)
        CPU: 115ms
     CGroup: /system.slice/munin-node.service
             `-288907 /usr/bin/perl -wT /usr/sbin/munin-node --foreground --config /etc/munin/munin-node.conf

Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Scheduled restart job, restart counter is at 4.
Dec 31 18:31:18 u2404 systemd[1]: Starting munin-node.service - Munin Node...
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin# journalctl -xeu munin-node.service
--
-- A start job for unit munin-node.service has finished with a failure.
--
-- The job identifier is 33596 and the job result is failed.
Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Scheduled restart job, restart counter is at 4.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Automatic restarting of the unit munin-node.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Dec 31 18:31:18 u2404 systemd[1]: Starting munin-node.service - Munin Node...
-- Subject: A start job for unit munin-node.service has begun execution
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- A start job for unit munin-node.service has begun execution.
--
-- The job identifier is 33765.
Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Main process exited, code=exited, status=1/FAILURE
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- An ExecStart= process belonging to unit munin-node.service has exited.
--
-- The process' exit code is 'exited' and its exit status is 1.
Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- The unit munin-node.service has entered the 'failed' state with result 'exit-code'.
Dec 31 18:31:18 u2404 systemd[1]: Failed to start munin-node.service - Munin Node.
-- Subject: A start job for unit munin-node.service has failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- A start job for unit munin-node.service has finished with a failure.
--
-- The job identifier is 33765 and the job result is failed.
Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Scheduled restart job, restart counter is at 5.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Automatic restarting of the unit munin-node.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Start request repeated too quickly.
Dec 31 18:31:18 u2404 systemd[1]: munin-node.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- The unit munin-node.service has entered the 'failed' state with result 'exit-code'.
Dec 31 18:31:18 u2404 systemd[1]: Failed to start munin-node.service - Munin Node.
-- Subject: A start job for unit munin-node.service has failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- A start job for unit munin-node.service has finished with a failure.
--
-- The job identifier is 33934 and the job result is failed.
root@u2404:/etc/munin#
root@u2404:/etc/munin#
root@u2404:/etc/munin#

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[Bug] Munin-node fails to start when 'host *' is set in munin-node.conf #1641

[Bug] Munin-node fails to start when 'host *' is set in munin-node.conf #1641

leemgs commented Dec 31, 2024 •

edited

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leemgs commented Dec 31, 2024

[Bug] Munin-node fails to start when 'host *' is set in munin-node.conf #1641

[Bug] Munin-node fails to start when 'host *' is set in munin-node.conf #1641

Comments

leemgs commented Dec 31, 2024 • edited Loading

leemgs commented Dec 31, 2024

Debug messages

leemgs commented Dec 31, 2024 •

edited

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