Skip to main content
Version: nightly

ISC DHCPd monitoring with Netdata

ISC DHCP is a DHCP server that supports both IPv4 and IPv6, and is suitable for use in high-volume and high-reliability applications.

This module monitors active leases and IP pools utilization collecting data from the DHCP client lease database (dhcpd.leases).

Requirements

dhcpd.leases must be readable by netdata user.

Metrics

All metrics have "isc_dhcps." prefix.

MetricScopeDimensionsUnits
active_leases_totalglobalactiveleases
pool_active_leasesglobala dimension per DHCP poolleases
pool_utilizationglobala dimension per DHCP poolpercentage

Configuration

Edit the go.d/isc_dhcpd.conf configuration file using edit-config from the Netdata config directory, which is typically at /etc/netdata.

cd /etc/netdata # Replace this path with your Netdata config directory
sudo ./edit-config go.d/isc_dhcpd.conf

Needs leases_path (path to the DHCP client lease database), and a list of IP pools to monitor. IP pool networks is a space separated list of IP ranges.

Here is a configuration example:

jobs:
- name: ipv4_example
leases_path: '/path/to/ipv4_leases_file'
pools:
- name: office
networks: '192.0.2.1-192.0.2.254'
- name: wifi
networks: '198.51.100.0/24'
- name: dmz
networks: '203.0.113.0/255.255.255.0'

- name: ipv6_example
leases_path: '/path/to/ipv6_leases_file'
pools:
- name: office
networks: '2001:0DB8::/64'
- name: wifi
networks: '2001:0DB8:0:1::/64'
- name: dmz
networks: '2001:0DB8:0:2::/64'

For all available options, see the ISC dhcpd collector's configuration file.

Troubleshooting

To troubleshoot issues with the isc_dhcpd collector, run the go.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

  • Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the plugins setting under [directories].

    cd /usr/libexec/netdata/plugins.d/
  • Switch to the netdata user.

    sudo -u netdata -s
  • Run the go.d.plugin to debug the collector:

    ./go.d.plugin -d -m isc_dhcpd

Was this page helpful?

Contribute