ISC DHCP
ISC DHCP
Plugin: go.d.plugin Module: isc_dhcpd
Overview
This collector monitors ISC DHCP lease usage by reading the DHCP client lease database (dhcpd.leases).
This collector is supported on all platforms.
This collector supports collecting metrics from multiple instances of this integration, including remote instances.
Default Behavior
Auto-Detection
This integration doesn’t support auto-detection.
Limits
The default configuration for this integration does not impose any limits on data collection.
Performance Impact
The default configuration for this integration is not expected to impose a significant performance impact on the system.
Setup
Prerequisites
No action required.
Configuration
File
The configuration file name for this integration is go.d/isc_dhcps.conf.
You can edit the configuration file using the edit-config script from the
Netdata config directory.
cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/isc_dhcps.conf
Options
The following options can be defined globally: update_every, autodetection_retry.
| Name | Description | Default | Required |
|---|---|---|---|
| update_every | Data collection frequency. | 1 | False |
| autodetection_retry | Recheck interval in seconds. Zero means no recheck will be scheduled. | 0 | False |
| leases_path | Path to DHCP client lease database. | /var/lib/dhcp/dhcpd.leases | False |
| pools | List of IP pools to monitor. | True |
pools
List of IP pools to monitor.
- IP range syntax: see supported formats.
- Syntax:
pools:
- name: "POOL_NAME1"
networks: "SPACE SEPARATED LIST OF IP RANGES"
- name: "POOL_NAME2"
networks: "SPACE SEPARATED LIST OF IP RANGES"
Examples
Basic
A basic example configuration.
jobs:
- name: local
pools:
- name: lan
networks: "192.168.0.0/24 192.168.1.0/24 192.168.2.0/24"
- name: wifi
networks: "10.0.0.0/24"
Metrics
Metrics grouped by scope.
The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
Per ISC DHCP instance
These metrics refer to the entire monitored application.
This scope has no labels.
Metrics:
| Metric | Dimensions | Unit |
|---|---|---|
| isc_dhcpd.active_leases_total | active | leases |
| isc_dhcpd.pool_active_leases | a dimension per DHCP pool | leases |
| isc_dhcpd.pool_utilization | a dimension per DHCP pool | percentage |
Alerts
There are no alerts configured by default for this integration.
Troubleshooting
Debug Mode
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.ddirectory, usually at/usr/libexec/netdata/plugins.d/. If that’s not the case on your system, opennetdata.confand look for thepluginssetting under[directories].cd /usr/libexec/netdata/plugins.d/ -
Switch to the
netdatauser.sudo -u netdata -s -
Run the
go.d.pluginto debug the collector:./go.d.plugin -d -m isc_dhcpd