New Install, Can't add first device

Help
#1

Hello,

I’m a new user and just deployed a fresh install of LibreNMS today on CentOS 7. I can’t seem to add any of the network devices I need to monitor. LibreNMS comes back with the error “Could not ping 10.0.100.1”. I’ve tried other hosts on the network as well with the same result.

Funny thing is I can ping all these devices from the LibreNMS shell just fine along with performing SNMPwalks. Is there a setting I missed somewhere?

./validate.php

====================================

Component Version
LibreNMS 1.33-18-g1dfcde3
DB Schema 215
PHP 7.1.10
MySQL 5.5.56-MariaDB
RRDTool 1.4.8
SNMP NET-SNMP 5.7.2

====================================

[OK] Database connection successful
[OK] Database schema correct
[WARN] You have not added any devices yet.
[FIX] You can add a device in the webui or with ./addhost.php

1 Like
#2

try adding this to your config.php

$config['fping'] = "/usr/sbin/fping";

#3

Not sure if it’s cool to continue to use this thread, but I was able to ping/fping successfully from the shell before I made that change. Both before and after adding that I still have the same issue. My validate.php results were the same as Joshua_B.

2 Likes
#4

this is a pin poted in discord

If you have devices suddenly showing as down, you need to set $config[‘fping’] = ‘/usr/sbin/fping’; or $config[‘fping’] = ‘/usr/bin/fping’; in your config.php and it will start working again. We fixed a bug where fping always showed up even if the command failed.(edited)

#5

@Kevin_Krumm Thanks! So this fixed the discovery/adding of the device from the shell with ./addhost -b host, but oddly enough I still can’t add through the web gui. I’m fine adding from the shell, but curious if you know why the gui side would still fail?

#6

is it still giving the same message in web ui?

#7

Mine also adds VIA shell, but no SNMP connection is added. Manually adding SNMP doesn’t work either.
Running snmpwalk using the hostname pulls OIDs from the target without a problem in the shell.

#8

run ./daily.sh iirc issues with discovery… so it may help pull those updates.

also, run ./validate.php see if you have any fails of fixes.

#9

Hrm. The cron error is new (after daily.sh)…

====================================

Component Version
LibreNMS 1.33-20-g6fcd406
DB Schema 215
PHP 7.1.10
MySQL 5.5.56-MariaDB
RRDTool 1.4.8
SNMP NET-SNMP 5.7.2

====================================

[OK] Database connection successful
[OK] Database schema correct
[FAIL] Discovery has never run.", "Check the cron job

#10

check it in cron and also look at your event log see if have any discovery events in the last 24 hours.

#11

I ran a bunch of the crons manually, with nothing of note happening;
discovery.php -h all
discovery.php -h new
etc, etc.

Cron is running, but the host has only been installed for an hour or so.

librenms.log is remarkably sparse. Nothing much there, 26 lines I could post somewhere but it’s all zero discovery.

#12

there was issue with ping only devices causing discovery to stop. the fix has been pushed. So the discovery for you probably hasn’t run due to that.

#13

Likely. My expectations are that I should a) be able to add hosts (and begin collecting their SNMP stats) manually and b) run discoveries manually. Am I on track with those?

#14

you can try and add the device and then run ./discovery.php -h HOSTNAME

#15

No impact.

./discovery.php -h 10.177.176.106
LibreNMS Discovery
SNMP: Get[0/0.00s] Walk [0/0.00s]
MySQL: Cell[0/0.00s] Row[0/0.00s] Rows[3/0.00s] Column[0/0.00s] Update[0/0.00s] Insert[0/0.00s] Delete[0/0.00s]

#16

is this device in LibreNMS with that as its name?

#17

I tried the hostname as well, same result. Just didn’t want to post the actual host/domain publicly.

#18

remove the device and add it back… sounds like it didn’t add correctly with SNMP.

#19

@Kevin_Krumm Correct. In the web ui it gives the same message as before “could not ping xxx” and fails to add the device. Adding via shell is working perfectly now.

#20

yall may want to pop into discord https://t.libren.ms/discord