Overview Datadog Agent for Docker

The Datadog Agent for Docker enables you to collect metrics, logs, and events from your containerized applications and send them to Kloudfuse for observability. This integration allows you to monitor Docker container performance and application behavior by deploying the Datadog agent container alongside your services. Use this feature to gain visibility into your Docker environments with minimal configuration.

Basic Datadog Deployment on Docker Environments

Use the following steps to integrate Datadog agent with Docker container services.

Add the following datadog service entry in the existing docker-compose.yaml:

datadog:
    build: datadog
    container_name: datadog-agent #replace with anything specific to environment.
    links:
     - <<service>> # Add appropriate service links
    environment:
     - DD_API_KEY=temp_api_key
     - DD_CONTAINER_EXCLUDE=name:datadog-agent # OPTIONAL To exclude datadog agent logs to be sent to Kloudfuse
    volumes:
     - /var/run/docker.sock:/var/run/docker.sock
     - /proc/:/host/proc/:ro
     - /sys/fs/cgroup:/host/sys/fs/cgroup:ro
     - /var/lib/docker/containers:/var/lib/docker/containers:ro

yaml

Create a directory datadog to build the datadog agent image.

Create a datadog.yaml file in the datadog directory to configure the agent to send data to the Kloudfuse ingester.

api_key: temp_api_key
site: datadoghq.com

dd_url: "http://<URL>/ingester" # Use http or https depending on whether HTTPS/TLS is configured on Kloudfuse
skip_ssl_validation: true # Skip this if you do not want to skip the SSL/TLS validation


logs_enabled: true
logs_config:
  logs_dd_url: "URL:80" # Use port 443 if HTTPS/TLS is enabled
  use_http: true
  logs_no_ssl: true # Set to false if HTTPS/TLS is enabled
  auto_multi_line_detection: false
  use_v2_api: false
  container_collect_all: true

apm_config:
  enabled: true
  apm_dd_url: "URL:80/ingester" # User port 443 if HTTPS/TLS is enabled

process_config:
  process_dd_url: "http://URL/ingester" # Use http or https depending on whether HTTPS/TLS is configured on Kloudfuse
  events_dd_url: "http://URL/ingester" # Use http or https depending on whether HTTPS/TLS is configured on Kloudfuse
  container_collection:
    enabled: false
metadata_providers:
  - name: host
    interval: 300

use_v2_api:
  series: true

yaml

Create a Dockerfile in the datadog directory.

FROM gcr.io/datadoghq/agent:7

ADD datadog.yaml /etc/datadog-agent/datadog.yaml

Add the necessary yaml files to the conf.d directory.
Build the datadog agent image.
```
docker-compose build
```
Update your current deployment to use the Datadog agent container to send Metrics, Logs, and Events data to Kloudfuse.
```
docker compose up -d
```

Adding Custom Tags

Add custom tags to the agent for all metrics, logs, and events collected by the agent. Follow these steps.

Update the environment section of datadog in docker-compose.yml file to include following code.

datadog:
    ...
    environment:
     ...
     - DD_TAG=custom_tag_name:custom_tag_value

yaml

The Kloudfuse helm custom-values.yaml file must list the custom tags.
```
ingester:
  config:
    hostTagIncludes:
    ...
    - custom_tag_name (1)
    ...
```
yaml
1 custom_tag_name: Add all custom tag names; otherwise, the system may overwrite existing configurations.
Alternatively, if you don’t plan to maintain a long list of possible custom tags, set allowAllHostTags to true. This effectively adds all extracted custom tags to the allow list.
```
ingester:
  config:
    allowAllHostTags: true (1)
```
yaml
1 allowAllHostTags: Adds all custom tag names to the allow list; otherwise, the system may overwrite existing configurations.