Application DHCP Stats Client Agent is deprecated

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1

Hello, I am trying to setup DHCP polling per the configuration guide, using the snmp extend capabilities as listed here:
https://docs.librenms.org/Extensions/Applications/
upon enabling the application, I get a notification that: Application enabled by user: dhcp-stats
However, upon a page refresh, it states that:
Application DHCP Stats Client Agent is deprecated, and all graphs produce a draw error. I;m looking to see if it’s truly deprecated, and I should get info, or if it’s deprecated, and I should not be attempting the application with extend snmp? What does LibreNMS suggest for getting dhcp-stats out of CentOS 8 Server running ISC-dhcpd? Thank you

2

hi and welcome to community,
are you using dhcp.py or the deprecated dhcp agent shell script?

3

Hi! Thank you for the warm welcome! I am using the dhcp.py script

4

I am getting the same message, and I am also using the dhcp.py as per the documentation here.

Any solution to this?

5

Hi SourceDoctor,
Do you have any ideas or suggestions about the dhcp.py script? Thank you for the help!

6

is the dhcp shellscript still present? If so, delete it and adjust your snmp configuration to use dhcp.py

7

I ran into this issue on my opnsense box and it was a combination of a few different problems:

  1. opnsense doesn’t have dhcpd-pools installed, I had to install it manually from ports
  2. Scripts run as snmp extensions not including /usr/local/{bin,sbin} in PATH so /usr/bin/env wasn’t finding python3 (this had silently broken the unbound script as well because it couldn’t find unbound-control)
  3. Bug: dhcp.py ignores the leasefile in dhcp.py when constructing the dhcpd-pools command: https://github.com/librenms/librenms-agent/blob/master/snmp/dhcp.py#L68

I didn’t dig into the php to understand why it was giving the wrong error because I don’t really know php, but my guess is that the json parsing isn’t strict enough so $dhcp_data[‘version’]; grabbed a version from something else in the snmp response

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