CoreDNS

Docker

To configure this check for an Agent running on a container:

Metric collection

Set Autodiscovery Integration Templates as Docker labels on your application container:

LABEL "com.datadoghq.ad.check_names"='["coredns"]'
LABEL "com.datadoghq.ad.init_configs"='[{}]'
LABEL "com.datadoghq.ad.instances"='[{"openmetrics_endpoint":"http://%%host%%:9153/metrics", "tags":["dns-pod:%%host%%"]}]'

To enable the legacy mode of this OpenMetrics-based check, replace openmetrics_endpoint with prometheus_url:

LABEL "com.datadoghq.ad.instances"='[{"prometheus_url":"http://%%host%%:9153/metrics", "tags":["dns-pod:%%host%%"]}]' 

Notes:

• The shipped coredns.d/auto_conf.yaml file enables the prometheus_url option by default for legacy mode.
• The dns-pod tag keeps track of the target DNS pod IP. The other tags are related to the Datadog Agent that is polling the information using the service discovery.
• The service discovery annotations need to be done on the pod. In case of a deployment, add the annotations to the metadata of the template’s specifications. Do not add it at the outer specification level.

Log collection

Collecting logs is disabled by default in the Datadog Agent. To enable it, see Docker Log Collection.

Then, set Log Integrations as Docker labels:

LABEL "com.datadoghq.ad.logs"='[{"source":"coredns","service":"<SERVICE_NAME>"}]'

Kubernetes

To configure this check for an Agent running on Kubernetes:

Metric collection

Set Autodiscovery Integrations Templates as pod annotations on your application container. Alternatively, you can configure templates with a file, configmap, or key-value store.

Annotations v1 (for Datadog Agent < v7.36)

apiVersion: v1
kind: Pod
metadata:
  name: coredns
  annotations:
    ad.datadoghq.com/coredns.check_names: '["coredns"]'
    ad.datadoghq.com/coredns.init_configs: '[{}]'
    ad.datadoghq.com/coredns.instances: |
      [
        {
          "openmetrics_endpoint": "http://%%host%%:9153/metrics", 
          "tags": ["dns-pod:%%host%%"]
        }
      ]      
  labels:
    name: coredns
spec:
  containers:
    - name: coredns

Annotations v2 (for Datadog Agent v7.36 or later)

apiVersion: v1
kind: Pod
metadata:
  name: coredns
  annotations:
    ad.datadoghq.com/coredns.checks: |
      {
        "coredns": {
          "init_config": {},
          "instances": [
            {
              "openmetrics_endpoint": "http://%%host%%:9153/metrics", 
              "tags": ["dns-pod:%%host%%"]
            }
          ]
        }
      }      
  labels:
    name: coredns
spec:
  containers:
    - name: coredns

To enable the legacy mode of this OpenMetrics-based check, replace openmetrics_endpoint with prometheus_url:

Annotations v1 (for Datadog Agent < v7.36)

    ad.datadoghq.com/coredns.instances: |
      [
        {
          "prometheus_url": "http://%%host%%:9153/metrics", 
          "tags": ["dns-pod:%%host%%"]
        }
      ]      

Annotations v2 (for Datadog Agent v7.36 or later)

          "instances": [
            {
              "prometheus_url": "http://%%host%%:9153/metrics", 
              "tags": ["dns-pod:%%host%%"]
            }
          ]

Notes:

• The shipped coredns.d/auto_conf.yaml file enables the prometheus_url option by default for legacy mode.
• The dns-pod tag keeps track of the target DNS pod IP. The other tags are related to the Datadog Agent that is polling the information using the service discovery.
• The service discovery annotations need to be done on the pod. In case of a deployment, add the annotations to the metadata of the template’s specifications. Do not add it at the outer specification level.

Log collection

Collecting logs is disabled by default in the Datadog Agent. To enable it, see Kubernetes Log Collection.

Then, set Log Integrations as pod annotations. Alternatively, you can configure this with a file, configmap, or key-value store.

Annotations v1/v2

apiVersion: v1
kind: Pod
metadata:
  name: coredns
  annotations:
    ad.datadoghq.com/coredns.logs: '[{"source": "coredns", "service": "<SERVICE_NAME>"}]'
  labels:
    name: coredns

ECS

To configure this check for an Agent running on ECS:

Metric collection

Set Autodiscovery Integrations Templates as Docker labels on your application container:

{
  "containerDefinitions": [{
    "name": "coredns",
    "image": "coredns:latest",
    "dockerLabels": {
      "com.datadoghq.ad.check_names": "[\"coredns\"]",
      "com.datadoghq.ad.init_configs": "[{}]",
      "com.datadoghq.ad.instances": "[{\"openmetrics_endpoint\":\"http://%%host%%:9153/metrics\", \"tags\":[\"dns-pod:%%host%%\"]}]"
    }
  }]
}

To enable the legacy mode of this OpenMetrics-based check, replace openmetrics_endpoint with prometheus_url:

      "com.datadoghq.ad.instances": "[{\"prometheus_url\":\"http://%%host%%:9153/metrics\", \"tags\":[\"dns-pod:%%host%%\"]}]"

Notes:

• The shipped coredns.d/auto_conf.yaml file enables the prometheus_url option by default for legacy mode.
• The dns-pod tag keeps track of the target DNS pod IP. The other tags are related to the Datadog Agent that is polling the information using the service discovery.
• The service discovery annotations need to be done on the pod. In case of a deployment, add the annotations to the metadata of the template’s specifications. Do not add it at the outer specification level.

Log collection

Collecting logs is disabled by default in the Datadog Agent. To enable it, see ECS Log Collection.

Then, set Log Integrations as Docker labels:

{
  "containerDefinitions": [{
    "name": "coredns",
    "image": "coredns:latest",
    "dockerLabels": {
      "com.datadoghq.ad.logs": "[{\"source\":\"coredns\",\"service\":\"<SERVICE_NAME>\"}]"
    }
  }]
}