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diff --git a/src/go/plugin/go.d/modules/isc_dhcpd/integrations/isc_dhcp.md b/src/go/plugin/go.d/modules/isc_dhcpd/integrations/isc_dhcp.md new file mode 100644 index 000000000..4607c1a5a --- /dev/null +++ b/src/go/plugin/go.d/modules/isc_dhcpd/integrations/isc_dhcp.md @@ -0,0 +1,228 @@ +<!--startmeta +custom_edit_url: "https://github.com/netdata/netdata/edit/master/src/go/plugin/go.d/modules/isc_dhcpd/README.md" +meta_yaml: "https://github.com/netdata/netdata/edit/master/src/go/plugin/go.d/modules/isc_dhcpd/metadata.yaml" +sidebar_label: "ISC DHCP" +learn_status: "Published" +learn_rel_path: "Collecting Metrics/DNS and DHCP Servers" +most_popular: False +message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE" +endmeta--> + +# ISC DHCP + + +<img src="https://netdata.cloud/img/isc.png" width="150"/> + + +Plugin: go.d.plugin +Module: isc_dhcpd + +<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" /> + +## 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. + + +## 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 | + +### Per ISC DHCP instance + +These metrics refer to the DHCP pool. + +Labels: + +| Label | Description | +|:-----------|:----------------| +| dhcp_pool_name | The DHCP pool name defined in the collector configuration. | + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| isc_dhcpd.dhcp_pool_utilization | utilization | percent | +| isc_dhcpd.dhcp_pool_active_leases | active | leases | + + + +## Alerts + +There are no alerts configured by default for this integration. + + +## Setup + +### Prerequisites + +No action required. + +### Configuration + +#### File + +The configuration file name for this integration is `go.d/isc_dhcpd.conf`. + + +You can edit the configuration file using the `edit-config` script from the +Netdata [config directory](/docs/netdata-agent/configuration/README.md#the-netdata-config-directory). + +```bash +cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata +sudo ./edit-config go.d/isc_dhcpd.conf +``` +#### Options + +The following options can be defined globally: update_every, autodetection_retry. + + +<details open><summary>Config options</summary> + +| Name | Description | Default | Required | +|:----|:-----------|:-------|:--------:| +| update_every | Data collection frequency. | 1 | no | +| autodetection_retry | Recheck interval in seconds. Zero means no recheck will be scheduled. | 0 | no | +| leases_path | Path to DHCP client lease database. | /var/lib/dhcp/dhcpd.leases | no | +| pools | List of IP pools to monitor. | | yes | + +##### pools + +List of IP pools to monitor. + +- IP range syntax: see [supported formats](https://github.com/netdata/netdata/tree/master/src/go/plugin/go.d/pkg/iprange#supported-formats). +- Syntax: + +```yaml +pools: + - name: "POOL_NAME1" + networks: "SPACE SEPARATED LIST OF IP RANGES" + - name: "POOL_NAME2" + networks: "SPACE SEPARATED LIST OF IP RANGES" +``` + + +</details> + +#### Examples + +##### Basic + +A basic example configuration. + +<details open><summary>Config</summary> + +```yaml +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" + +``` +</details> + + + +## Troubleshooting + +### Debug Mode + +**Important**: Debug mode is not supported for data collection jobs created via the UI using the Dyncfg feature. + +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]`. + + ```bash + cd /usr/libexec/netdata/plugins.d/ + ``` + +- Switch to the `netdata` user. + + ```bash + sudo -u netdata -s + ``` + +- Run the `go.d.plugin` to debug the collector: + + ```bash + ./go.d.plugin -d -m isc_dhcpd + ``` + +### Getting Logs + +If you're encountering problems with the `isc_dhcpd` collector, follow these steps to retrieve logs and identify potential issues: + +- **Run the command** specific to your system (systemd, non-systemd, or Docker container). +- **Examine the output** for any warnings or error messages that might indicate issues. These messages should provide clues about the root cause of the problem. + +#### System with systemd + +Use the following command to view logs generated since the last Netdata service restart: + +```bash +journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep isc_dhcpd +``` + +#### System without systemd + +Locate the collector log file, typically at `/var/log/netdata/collector.log`, and use `grep` to filter for collector's name: + +```bash +grep isc_dhcpd /var/log/netdata/collector.log +``` + +**Note**: This method shows logs from all restarts. Focus on the **latest entries** for troubleshooting current issues. + +#### Docker Container + +If your Netdata runs in a Docker container named "netdata" (replace if different), use this command: + +```bash +docker logs netdata 2>&1 | grep isc_dhcpd +``` + + |