fail2ban: output data format wrong on RPI4

[PVasileff]

I've open that because ISSUE 283 is closed.

I have configured librenms to monitoring few servers. On two of them I have installed fail2ban and configured that snmp extend. On VM with Debian 11 and on rasberry pi 4 with rasbian 11.

I have installed libjson-perl and configured on both server on snmpd.conf:

extend fail2ban '/usr/bin/sudo /opt/snmp/fail2ban -c -U -f /usr/local/bin/fail2ban-client'

and in /etc/sudoers:

Debian-snmp ALL = NOPASSWD: /opt/snmp/fail2ban

When I have run with root on cli:

sudo -u Debian-snmp /usr/bin/sudo /opt/snmp/fail2ban -c -U -f /usr/local/bin/fail2ban-client

on VM with Debian 11 - reported:

{"data":{"jails":{"nginx-forbidden":"0","ssh":"206"},"total":206},"error":"0","errorString":"fail2ban-client exited with 0","version":"1"}
on RPI 4 with Rasbian - reported:

{"data":{"jails":{"openvpn":"0","ssh":"0"},"total":0},"error":"0","errorString":"fail2ban-client exited with 0","version":"1"}

BUT on librenms graphs for VM with Debian 11:

• graphs are OK

Debian 11 Graphs

On RPI 4 - with rasbian 11 - NOT:

RPI4

Any Ideas how to fix that on RPI 4?

[PVasileff]

Problem solved.

On RPI4 when I run Capture - Poller - I see:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:

Fixed with:

export LANG="en_US.UTF-8"
export LANGUAGE="en_US.UTF-8"
export LC_CTYPE="en_US.UTF-8"
export LC_NUMERIC="en_US.UTF-8"
export LC_TIME="en_US.UTF-8"
export LC_COLLATE="en_US.UTF-8"
export LC_MONETARY="en_US.UTF-8"
export LC_MESSAGES="en_US.UTF-8"
export LC_PAPER="en_US.UTF-8"
export LC_NAME="en_US.UTF-8"
export LC_ADDRESS="en_US.UTF-8"
export LC_TELEPHONE="en_US.UTF-8"
export LC_MEASUREMENT="en_US.UTF-8"
export LC_IDENTIFICATION="en_US.UTF-8"

and in /etc/locale.gen just enabled:

en_US.UTF-8 UTF-8
and then run:

locale-gen; reboot