Plugin: go.d.plugin Module: coredns
This collector monitors CoreDNS instances.
This collector is supported on all platforms.
This collector supports collecting metrics from multiple instances of this integration, including remote instances.
This integration doesn’t support auto-detection.
The default configuration for this integration does not impose any limits on data collection.
The default configuration for this integration is not expected to impose a significant performance impact on the system.
No action required.
The configuration file name for this integration is go.d/coredns.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/coredns.conf
The following options can be defined globally: update_every, autodetection_retry.
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 |
url | Server URL. | http://127.0.0.1:9153/metrics | yes |
per_server_stats | Server filter. | no | |
per_zone_stats | Zone filter. | no | |
username | Username for basic HTTP authentication. | no | |
password | Password for basic HTTP authentication. | no | |
proxy_url | Proxy URL. | no | |
proxy_username | Username for proxy basic HTTP authentication. | no | |
proxy_password | Password for proxy basic HTTP authentication. | no | |
timeout | HTTP request timeout. | 2 | no |
method | HTTP request method. | GET | no |
body | HTTP request body. | no | |
headers | HTTP request headers. | no | |
not_follow_redirects | Redirect handling policy. Controls whether the client follows redirects. | no | no |
tls_skip_verify | Server certificate chain and hostname validation policy. Controls whether the client performs this check. | no | no |
tls_ca | Certification authority that the client uses when verifying the server’s certificates. | no | |
tls_cert | Client tls certificate. | no | |
tls_key | Client tls key. | no |
Metrics of servers matching the selector will be collected.
per_server_stats:
includes:
- pattern1
- pattern2
excludes:
- pattern3
- pattern4
Metrics of zones matching the selector will be collected.
per_zone_stats:
includes:
- pattern1
- pattern2
excludes:
- pattern3
- pattern4
An example configuration.
jobs:
- name: local
url: http://127.0.0.1:9153/metrics
Local server with basic HTTP authentication.
jobs:
- name: local
url: http://127.0.0.1:9153/metrics
username: foo
password: bar
Note: When you define multiple jobs, their names must be unique.
Collecting metrics from local and remote instances.
jobs:
- name: local
url: http://127.0.0.1:9153/metrics
- name: remote
url: http://203.0.113.10:9153/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.
These metrics refer to the entire monitored application.
This scope has no labels.
Metrics:
Metric | Dimensions | Unit |
---|---|---|
coredns.dns_request_count_total | requests | requests/s |
coredns.dns_responses_count_total | responses | responses/s |
coredns.dns_request_count_total_per_status | processed, dropped | requests/s |
coredns.dns_no_matching_zone_dropped_total | dropped | requests/s |
coredns.dns_panic_count_total | panics | panics/s |
coredns.dns_requests_count_total_per_proto | udp, tcp | requests/s |
coredns.dns_requests_count_total_per_ip_family | v4, v6 | requests/s |
coredns.dns_requests_count_total_per_per_type | a, aaaa, mx, soa, cname, ptr, txt, ns, ds, dnskey, rrsig, nsec, nsec3, ixfr, any, other | requests/s |
coredns.dns_responses_count_total_per_rcode | noerror, formerr, servfail, nxdomain, notimp, refused, yxdomain, yxrrset, nxrrset, notauth, notzone, badsig, badkey, badtime, badmode, badname, badalg, badtrunc, badcookie, other | responses/s |
These metrics refer to the DNS server.
Labels:
Label | Description |
---|---|
server_name | Server name. |
Metrics:
Metric | Dimensions | Unit |
---|---|---|
coredns.server_dns_request_count_total | requests | requests/s |
coredns.server_dns_responses_count_total | responses | responses/s |
coredns.server_request_count_total_per_status | processed, dropped | requests/s |
coredns.server_requests_count_total_per_proto | udp, tcp | requests/s |
coredns.server_requests_count_total_per_ip_family | v4, v6 | requests/s |
coredns.server_requests_count_total_per_per_type | a, aaaa, mx, soa, cname, ptr, txt, ns, ds, dnskey, rrsig, nsec, nsec3, ixfr, any, other | requests/s |
coredns.server_responses_count_total_per_rcode | noerror, formerr, servfail, nxdomain, notimp, refused, yxdomain, yxrrset, nxrrset, notauth, notzone, badsig, badkey, badtime, badmode, badname, badalg, badtrunc, badcookie, other | responses/s |
These metrics refer to the DNS zone.
Labels:
Label | Description |
---|---|
zone_name | Zone name. |
Metrics:
Metric | Dimensions | Unit |
---|---|---|
coredns.zone_dns_request_count_total | requests | requests/s |
coredns.zone_dns_responses_count_total | responses | responses/s |
coredns.zone_requests_count_total_per_proto | udp, tcp | requests/s |
coredns.zone_requests_count_total_per_ip_family | v4, v6 | requests/s |
coredns.zone_requests_count_total_per_per_type | a, aaaa, mx, soa, cname, ptr, txt, ns, ds, dnskey, rrsig, nsec, nsec3, ixfr, any, other | requests/s |
coredns.zone_responses_count_total_per_rcode | noerror, formerr, servfail, nxdomain, notimp, refused, yxdomain, yxrrset, nxrrset, notauth, notzone, badsig, badkey, badtime, badmode, badname, badalg, badtrunc, badcookie, other | responses/s |
There are no alerts configured by default for this integration.
Important: Debug mode is not supported for data collection jobs created via the UI using the Dyncfg feature.
To troubleshoot issues with the coredns
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 coredns
If you’re encountering problems with the coredns
collector, follow these steps to retrieve logs and identify potential issues:
Use the following command to view logs generated since the last Netdata service restart:
journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep coredns
Locate the collector log file, typically at /var/log/netdata/collector.log
, and use grep
to filter for collector’s name:
grep coredns /var/log/netdata/collector.log
Note: This method shows logs from all restarts. Focus on the latest entries for troubleshooting current issues.
If your Netdata runs in a Docker container named “netdata” (replace if different), use this command:
docker logs netdata 2>&1 | grep coredns