[FAIL] Discovery has not completed in the last 24 hours, check the cron job

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1

Hi Guys,

I tried all possible variations to fix this issue, nothing helps
[FAIL] Discovery has not completed in the last 24 hours, check the cron job
Maybe it’s because of some permissions? please see below

-rwxr-xr-x. 1 librenms librenms 5049 Aug 24 00:46 discovery.php
-rwxr-xr-x. 1 librenms librenms 13350 Aug 24 00:46 discovery-wrapper.py

2

amaizenshtein,

you need to troubleshoot - Check the cron job see if you have anything setup incorrectly.
Also, check in the web UI in the poll-log see when the last time your poller has run.

3

Here is my cron, I checked also webui, and see the pooler is updating every minute

33 */6 * * * librenms /opt/librenms/discovery.php -h all >> /dev/null 2>&1
*/5 * * * * librenms /opt/librenms/discovery.php -h new >> /dev/null 2>&1
*/1 * * * * librenms /opt/librenms/cronic /opt/librenms/poller-wrapper.py 50
15 0 * * * librenms /opt/librenms/daily.sh >> /dev/null 2>&1

          • librenms /opt/librenms/alerts.php >> /dev/null 2>&1
            */5 * * * * librenms /opt/librenms/poll-billing.php >> /dev/null 2>&1
            01 * * * * librenms /opt/librenms/billing-calculate.php >> /dev/null 2>&1
            */5 * * * * librenms /opt/librenms/check-services.php >> /dev/null 2>&1
            */5 * * * * librenms /opt/librenms/html/plugins/Weathermap/map-poller.php >> /dev/null 2>&1
4

how long does it take /opt/librenms/discovery.php -h all to complete? You could try updating to the discovery wrapper too, check the updated librenms.nonroot.cron

5

Hi Murrant,

How can I know how much time took for /opt/librenms/discovery.php -h to complete?
I’ve 220 devices on that system, what is librenms.nonroot.cron?

6

I changed discovery.php to discovery-wrapper.py? and it fixed it, Just to be sure I understand it correctly, discovery-wrapper.py runs multiple threads in paralel, while discovery.php runs threads after each other which could take a lot of time, please advise if I’m correct

7

Correct…

8

hi,

how you did the changes? can you give us your setup by setup. thanks.

9

Update your cron file to the one supplied with LibreNMS. (it was updated to use discovery-wrapper.py long ago)