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Debug Mode

To enable the Agent full debug mode:

  1. Modify your local datadog.yaml file (see this page to locate this configuration file on your instance)

  2. Replace # log_level: INFO with log_level: DEBUG (remove # to uncomment the line).

  3. Restart the Datadog Agent. See the Agent Commands page for OS-specific details.

  4. Wait a few minutes to generate some logs. See the Agent documentation for the location of the logs.

Obtaining debug logs from the container Agent

Set the DD_LOG_LEVEL=debug environment variable when starting your Agent.

If your container is already running:

  1. To prevent your process from being restarted by S6, run:

    rm /var/run/s6/services/agent/finish

  2. Then stop the Agent:

    s6-svc -d /var/run/s6/services/agent/
  3. Restart then the Agent with debug log level by running:

    DD_LOG_LEVEL=debug agent start

When run in a container, the Agent cannot be restarted via service datadog-agent restart (or similar) which causes the container to be killed by Docker. Use supervisor to restart a containerized Agent:

/opt/datadog-agent/bin/supervisorctl -c /etc/dd-agent/supervisor.conf restart all

The following commands enable debug logging, restart the Agent, wait 60 seconds, then send a flare, in that order:

sed -i '/\[Main\]/a LOG_LEVEL=DEBUG' /etc/dd-agent/datadog.conf
/opt/datadog-agent/bin/supervisorctl -c /etc/dd-agent/supervisor.conf restart all
sleep 60
/etc/init.d/datadog-agent flare <CASE_ID>

Debug logs can be disabled with:

sed -i '/LOG_LEVEL=DEBUG/d' /etc/dd-agent/datadog.conf
/opt/datadog-agent/bin/supervisorctl -c /etc/dd-agent/supervisor.conf restart all

Or the container can be restarted.

Further Reading