Debugging Javascript errors in Selenium brower items

[seren]

Hello all,

I have a browser item Javascript debugging question: is there a way to see the javascript engine output, and do you have any recommendations for running/testing code outside of Zabbix?

I ask because we have been replacing our web scenarios with Selenium browser-based checks and it's great for the most part. It's allowed us to generate 2FA/MFA tokens which was impossible with the old web scenarios (feel free to ask for the TOTP javascript code if you're interested).

However it's been a pain to debug Javascript errors. Log statements (eg. Zabbix.log(3, "something"); ) help, but if there's a syntax error that prevents the script from running, nothing shows up in the server logs. This happens fairly frequently since the version of Javascript used by Zabbix/Selenium doesn't have some of the newer syntax and features, and thus it's easy to accidentally introduce errors that prevent anything from running.

Does anyone know of a way to see the javascript engine output. Also, do you have any recommendations for how to test this code before throwing it into a browser item?

Thanks!

[troffasky]

Look at runtime control log_level_increase=browser poller

https://www.zabbix.com/documentation/current/en/manpages/zabbix_server#runtime-control

[troffasky]

Look at runtime control log_level_increase=browser poller

https://www.zabbix.com/documentation/current/en/manpages/zabbix_server#runtime-control

[seren]

Thanks! For anyone else running Zabbix in a container, this should work (you might need to change the container name):

docker exec -ti zabbix-zabbix-server-1 sh -c "zabbix_server --runtime-control log_level_increase='browser poller'"
docker logs -f --tail=0 -t zabbix-zabbix-server-1
docker exec -ti zabbix-zabbix-server-1 sh -c "zabbix_server --runtime-control log_level_decrease='browser poller'"