Autodiscovery: Scenarios & Examples

문서 > 컨테이너 모니터링 > 컨테이너 가이드 > Autodiscovery: Scenarios & Examples

이 페이지는 아직 한국어로 제공되지 않으며 번역 작업 중입니다. 번역에 관한 질문이나 의견이 있으시면 언제든지 저희에게 연락해 주십시오.

This page contains detailed example templates for configuring integrations in containerized environments in the following scenarios:

Redis integration for all Redis containers
Apache integration with HTTP Check for all Apache containers

For more information about containers and integrations, see Docker and Integrations and Kubernetes and Integrations.

All examples make use of Datadog’s Autodiscovery feature, which allows you to define configuration templates for Agent Checks on designated sets of containers. For more information about Autodiscovery, see Getting Started with Containers: Autodiscovery.

Redis integration for all Redis containers

In this example scenario, you have a containerized environment in which you want to set up and configure the Datadog-Redis integration for all containers that match the name redis. You have one container named redis and another named my-custom-redis, and you want to configure the Redis integration for both containers.

The Redis integration comes with default auto-configuration, but you want to additionally specify a password parameter and configure log collection.

Hypothetically, if you were to configure this integration on a host, you could reference redisdb.d/conf.yaml.example for parameters and create a conf.yaml file that contains the following:

init_config:
instances:
  - host: localhost
    port: 6379
    password: <PASSWORD>
logs:
  - type: file
    path: /var/log/redis_6379.log
    source: redis
    service: redis_service

Here, <PASSWORD> corresponds to the password to use for the connection.

To apply this configuration to your Redis containers: first, store your password as an environment variable named REDIS_PASSWORD; then:

In your pod manifest:

Autodiscovery annotations v2 (for Datadog Agent v7.36+)

apiVersion: v1
kind: Pod
metadata:
  name: redis
  annotations:
    ad.datadoghq.com/redis.checks: |
      {
        "redisdb": {
          "instances": [
            {
              "host": "%%host%%",
              "port":"6379",
              "password":"%%env_REDIS_PASSWORD%%"
            }
          ]
        }
      }      
    ad.datadoghq.com/redis.logs: |
      [
        {
          "type": "file",
          "path": "/var/log/redis_6379.log",
          "source": "redis",
          "service": "redis_service"
        }
      ]      
spec:
  containers:
    - name: redis
      image: redis:latest
      ports:
        - containerPort: 6379

Autodiscovery annotations v1

apiVersion: v1
kind: Pod
metadata:
  name: redis
  annotations:
    ad.datadoghq.com/redis.check_names: '["redisdb"]'
    ad.datadoghq.com/redis.init_configs: '[{}]'
    ad.datadoghq.com/redis.instances: |
      [
        {
          "host": "%%host%%",
          "port":"6379",
          "password":"%%env_REDIS_PASSWORD%%"
        }
      ]      
    ad.datadoghq.com/redis.logs: |
      [
        {
          "type": "file",
          "path": "/var/log/redis_6379.log",
          "source": "redis",
          "service": "redis_service"
        }
      ]      
spec:
  containers:
    - name: redis
      image: redis:latest
      ports:
        - containerPort: 6379

docker-compose.yaml

For Datadog Agent v7.36+:

labels:
  com.datadoghq.ad.checks: '{"redisdb": {"instances": [{"host": "%%host%%","port":"6379","password":"%%env_REDIS_PASSWORD%%"}], "logs": [{"type": "file", "path": "/var/log/redis_6379.log", "source": "redis", "service": "redis_service"}]}}'

For earlier Agent versions:

labels:
  com.datadoghq.ad.check_names: '["redisdb"]'
  com.datadoghq.ad.init_configs: '[{}]'
  com.datadoghq.ad.instances: '[{"host": "%%host%%","port":"6379","password":"%%env_REDIS_PASSWORD%%"}]'
  com.datadoghq.ad.logs: '[{"type": "file", "path": "/var/log/redis_6379.log", "source": "redis", "service": "redis_service"}]'

Create a conf.d/redisdb.d/conf.yaml file on your host:

ad_identifiers:
  - redis
init config:
instances:
  - host: "%%host%%"
    port: "6379"
    username: "datadog"
    password: "%%env_REDIS_PASSWORD%%"
logs:
  - type: "file"
    path: "/var/log/redis.log"
    source: "redis"
    service: "redis_service"

Mount your host conf.d/ folder to the containerized Agent’s conf.d folder.

In a ConfigMap:

kind: ConfigMap
apiVersion: v1
metadata:
  name: redisdb-config-map
  namespace: default
data:
  redisdb-config: |-
    ad_identifiers:
      - redis
    init_config:
    instances:
      - host: "%%host%%"
        port: "6379"
        password: "%%env_REDIS_PASSWORD%%"
    logs:
      - type: "file"
        path: "/var/log/redis_6379.log"
        source: "redis"
        service: "redis_service"

Then, in your manifest, define the volumeMounts and volumes:

# [...]
        volumeMounts:
        # [...]
          - name: redisdb-config-map
            mountPath: /conf.d/redisdb.d
        # [...]
      volumes:
      # [...]
        - name: redisdb-config-map
          configMap:
            name: redisdb-config-map
            items:
              - key: redisdb-config
                path: conf.yaml
# [...]

The following etcd commands create a Redis integration template with a custom password parameter:

etcdctl mkdir /datadog/check_configs/redis
etcdctl set /datadog/check_configs/redis/check_names '["redisdb"]'
etcdctl set /datadog/check_configs/redis/init_configs '[{}]'
etcdctl set /datadog/check_configs/redis/instances '[{"host": "%%host%%","port":"6379","password":"%%env_REDIS_PASSWORD%%"}]'

Notice that each of the three values is a list. Autodiscovery assembles list items into the integration configurations based on shared list indexes. In this case, it composes the first (and only) check configuration from check_names[0], init_configs[0] and instances[0].

In datadog-agent.yaml:

apiVersion: datadoghq.com/v2alpha1
kind: DatadogAgent
metadata:
  name: datadog
spec:
  global:
    [...]
  features:
    [...]
  override:
    nodeAgent:
      env: 
        - name: DD_IGNORE_AUTOCONF
          value: redisdb
      extraConfd:
        configDataMap:
          redisdb.yaml: |-
            ad_identifiers:
              - redis
            init_config:
            instances:
              - host: "%%host%%"
                port: 6379
                password: "%%env_REDIS_PASSWORD%%"

As a result, the Agent contains a redisdb.yaml file with the above configuration in the conf.d directory.

Note: The Redis integration comes with default auto-configuration, which takes precedence over configuration set in the Datadog Operator manifest. Because of this, the provided example manifest uses the DD_IGNORE_AUTOCONF variable to disable auto-configuration.

In datadog-values.yaml:

datadog:
  ignoreAutoConfig:
    - redisdb
  confd:
    redisdb.yaml: |-
      ad_identifiers:
        - redis
      init_config:
      instances:
        - host: "%%host%%"
          port: 6379
          password: "%%env_REDIS_PASSWORD%%"

As a result, the Agent contains a redisdb.yaml file with the above configuration in the conf.d directory.

Note: The Redis integration comes with default auto-configuration, which takes precedence over configuration set in Helm values. Because of this, the provided example uses datadog.ignoreAutoConfig to disable auto-configuration.

All of these examples use Autodiscovery template variables:

%%host%% is dynamically populated with the container’s IP.
%%env_REDIS_PASSWORD%% references an environment variable named REDIS_PASSWORD as seen by the Agent process.

Apache integration and HTTP Check on Apache containers

In this example scenario, you have a containerized environment in which you want to set up and configure the Datadog-Apache integration for all containers that match the name apache. You also want to set up an HTTP Check for testing two endpoints, /website_1 and /website_2

The Apache integration comes with default auto-configuration, but you want to add an additional configuration: you want to set the collection interval to 30 seconds.

Hypothetically, if you were to configure this integration on a host, you could reference the configuration options in apache.d/conf.yaml.example and http_check.d/conf.yaml.example. You would create two conf.yaml files:

apache.d/conf.yaml

init_config:
instances:
  - apache_status_url: http://%%host%%/server-status?auto
    min_collection_interval: 30

http_check.d/conf.yaml

init_config:
instances:
  - name: my_website_1
    url: http://%%host%%/website_1
    timeout: 1
  - name: my_website_2
    url: http://%%host%%/website_2
    timeout: 1

Autodiscovery Annotations v2 (for Datadog Agent v7.36+)

apiVersion: v1
kind: Pod
metadata:
  name: apache
  annotations:
    ad.datadoghq.com/apache.checks: |
      {
        "apache": {
          "instances": [
            {
              "apache_status_url": "http://%%host%%/server-status?auto",
              "min_collection_interval": 30
            }
          ]
        },
        "http_check": {
          "instances": [
            {
              "name": "my_website_1",
              "url": "http://%%host%%/website_1",
              "timeout": 1
            },
            {
              "name": "my_website_2",
              "url": "http://%%host%%/website_2",
              "timeout": 1
            }
          ]
        }
      }      
  labels:
    name: apache
spec:
  containers:
    - name: apache
  # (...)

Autodiscovery Annotations v1

apiVersion: v1
kind: Pod
metadata:
  name: apache
  annotations:
    ad.datadoghq.com/apache.check_names: '["apache","http_check"]'
    ad.datadoghq.com/apache.init_configs: '[{},{}]'
    ad.datadoghq.com/apache.instances: |
      [
        [
          {
            "apache_status_url": "http://%%host%%/server-status?auto",
            "min_collection_interval": 30
          }
        ],
        [
          {
            "name": "my_website_1",
            "url": "http://%%host%%/website_1",
            "timeout": 1
          },
          {
            "name": "my_website_2",
            "url": "http://%%host%%/website_2",
            "timeout": 1
          }
        ]
      ]      
  labels:
    name: apache
spec:
  containers:
    - name: apache
  # (...)

Dockerfile

For Datadog Agent v7.36+:

LABEL "com.datadoghq.ad.checks"='{"apache": {"instances": [{"apache_status_url": "http://%%host%%/server-status?auto", "min_collection_interval": 30}]}, "http_check":{"instances": [{"name":"my_website_1","url":"http://%%host%%/website_1","timeout":1},{"name":"my_website_2","url":"http://%%host%%/website_2","timeout":1}]}}'

For earlier Agent versions:

LABEL "com.datadoghq.ad.check_names"='["apache", "http_check"]'
LABEL "com.datadoghq.ad.init_configs"='[{},{}]'
LABEL "com.datadoghq.ad.instances"='[[{"apache_status_url": "http://%%host%%/server-status?auto", "min_collection_interval": 30}],[{"name":"my_website_1","url":"http://%%host%%/website_1","timeout":1},{"name":"my_website_2","url":"http://%%host%%/website_2","timeout":1}]]'

Create the folders conf.d/ and conf.d/apache.d on your host.
Add the custom auto-configuration below to conf.d/apache.d/conf.yaml on your host.

ad_identifiers:
  - apache

init_config:

instances:
  - apache_status_url: http://%%host%%/server-status?auto
    min_collection_interval: 30

Next, create the folder conf.d/http_check.d on your host.
Add the custom auto-configuration below to conf.d/http_check.d/conf.yaml on your host.

ad_identifiers:
  - apache

init_config:

instances:
  - name: "<WEBSITE_1>"
    url: "http://%%host%%/website_1"
    timeout: 1

  - name: "<WEBSITE_2>"
    url: "http://%%host%%/website_2"
    timeout: 1

Finally, mount the host conf.d/ folder to the containerized Agent conf.d/ folder.

The following ConfigMap defines the integration template for the apache and http_check containers:

kind: ConfigMap
apiVersion: v1
metadata:
  name: apache-config-map
  namespace: default
data:
  apache-config: |-
    ad_identifiers:
      - apache
    init_config:
    instances:
      - apache_status_url: http://%%host%%/server-status?auto
        min_collection_interval: 30    
  http-check-config: |-
    ad_identifiers:
      - apache
    init_config:
    instances:
      - name: "<WEBSITE_1>"
        url: "http://%%host%%/website_1"
        timeout: 1
      - name: "<WEBSITE_2>"
        url: "http://%%host%%/website_2"
        timeout: 1

In the manifest, define the volumeMounts and volumes:

# [...]
        volumeMounts:
        # [...]
          - name: apache-auto-config
            mountPath: /conf.d/apache.d/
          - name: http-auto-config
            mountPath: /conf.d/http_check.d/
        # [...]
      volumes:
      # [...]
        - name: apache-auto-config
          configMap:
            name: apache-config-map
            items:
              - key: apache-config
                path: auto_conf.yaml
        - name: http-auto-config
          configMap:
            name: apache-config-map
            items:
              - key: http-check-config
                path: auto_conf.yaml
# [...]

etcdctl set /datadog/check_configs/apache/check_names '["apache", "http_check"]'
etcdctl set /datadog/check_configs/apache/init_configs '[{}, {}]'
etcdctl set /datadog/check_configs/apache/instances '[[{"apache_status_url": "http://%%host%%/server-status?auto", "min_collection_interval": 30}],[{"name": "<WEBSITE_1>", "url": "http://%%host%%/website_1", timeout: 1},{"name": "<WEBSITE_2>", "url": "http://%%host%%/website_2", timeout: 1}]]'

Note: The order of each list matters. The Agent can only generate the HTTP check configuration correctly if all parts of its configuration have the same index across the three lists.

apiVersion: datadoghq.com/v2alpha1
kind: DatadogAgent
metadata:
  name: datadog
spec:
  global:
    [...]
  features:
    [...]
  override:
    nodeAgent:
      env:
        - name: DD_IGNORE_AUTOCONF
          value: apache
      extraConfd:
        configDataMap:
          apache.yaml: |-
            ad_identifiers:
              - apache
            init_config:
            instances:
              - apache_status_url: "http://%%host%%/server-status?auto"
                min_collection_interval: 30            
          http_check.yaml: |-
            ad_identifiers:
              - apache
            init_config:
            instances:
              - name: "my_website_1"
                url: "http://%%host%%/website_1"
                timeout: 1
              - name: "my_website_2"
                url: "http://%%host%%/website_2"
                timeout: 1

Note: The Apache integration comes with default auto-configuration, which takes precedence over configuration set in the Datadog Operator manifest. Because of this, the provided example manifest uses the DD_IGNORE_AUTOCONF variable to disable auto-configuration.

In datadog-values.yaml:

datadog:
  ignoreAutoConfig:
    - apache
  confd:
    apache.yaml: |-
      ad_identifiers:
        - apache
      init_config:
      instances:
        - apache_status_url: "http://%%host%%/server-status?auto"
          min_collection_interval: 30      
    http_check.yaml: |-
      ad_identifiers:
        - apache
      init_config:
      instances:
        - name: "my_website_1"
          url: "http://%%host%%/website_1"
          timeout: 1
        - name: "my_website_2"
          url: "http://%%host%%/website_2"
          timeout: 1

Note: The Apache integration comes with default auto-configuration, which takes precedence over configuration set in Helm values. Because of this, the provided example uses datadog.ignoreAutoConfig to disable auto-configuration.

All of these examples use Autodiscovery template variables: