Fail2ban input works, but is not visible in influxdb

Telegraf
1

Dear all,
I’ve got a working influxdb 2.0 installation and various servers with telegraf to report their metrics. Today, I added the fail2ban input to my (standard) telegraf.conf.

A test of the config on the servers was successful;
[…]
fail2ban,host=[host],jail=[jail1] banned=0i,failed=0i 1617545540000000000
fail2ban,host=[host],jail=[jail2] banned=0i,failed=0i 1617545540000000000
[…]

However, every metric - except fail2ban - reaches influxdb and I don’t know why it doesn’t work for fail2ban metrics.

There’s no different bucket, I can see every other measurement. Would really appreciate if you could give me tips on how to solve that issue!

Many thanks for your help in advance!

2

Any error messages in the telegraf log if you enable the debug option?

3

Hi there,
first off - thanks for taking the time to read and reply, highly appreciated.

Yes, there are indeed error messages;
Error in plugin: failed to run command /usr/bin/fail2ban-client status: exit status 255 -

4

I don’t think it has anything to do with Telegraf.
I suspect a faulty configuration of fail2ban.
Google the error message, I think you will find some clues.