DNS query
DNS query
Plugin: go.d.plugin Module: dns_query
Overview
This module monitors DNS query round-trip time (RTT).
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/dns_query.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/dns_query.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 |
| domains | Domain or subdomains to query. The collector will choose a random domain from the list on every iteration. | True | |
| servers | Servers to query. | True | |
| port | DNS server port. | 53 | False |
| network | Network protocol name. Available options: udp, tcp, tcp-tls. | udp | False |
| record_types | Query record type. Available options: A, AAAA, CNAME, MX, NS, PTR, TXT, SOA, SPF, TXT, SRV. | A | False |
| timeout | Query read timeout. | 2 | False |
Examples
Basic
An example configuration.
jobs:
- name: job1
record_types:
- A
- AAAA
domains:
- google.com
- github.com
- reddit.com
servers:
- 8.8.8.8
- 8.8.4.4
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 server
These metrics refer to the DNS server.
Labels:
| Label | Description |
|---|---|
| server | DNS server address. |
| network | Network protocol name (tcp, udp, tcp-tls). |
| record_type | DNS record type (e.g. A, AAAA, CNAME). |
Metrics:
| Metric | Dimensions | Unit |
|---|---|---|
| dns_query.query_status | success, network_error, dns_error | status |
| dns_query.query_time | query_time | seconds |
Alerts
The following alerts are available:
| Alert name | On metric | Description |
|---|---|---|
| dns_query_query_status | dns_query.query_status | DNS request type ${label:record_type} to server ${label:server} is unsuccessful |
Troubleshooting
Debug Mode
To troubleshoot issues with the dns_query 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 dns_query