I installed dd-agent on Amazon linux ec2. If I run my python script directly on the host machine (I used the SDK named "dogstatsd-python"), all the metrics can be sent to datadog (I logged in to datadoghq.com and saw the metrics there). the script is something like: from statsd import statsd statsd.connect('localhost', 8125) statsd.increment('mymetrics') However, I launched a docker container and run the same script from inside the container: from statsd import statsd statsd.connect('172.14.0.1', 8125) statsd.increment('my metrics') '172.14.0.1' is the IP of the host, which was extracted with