How iHeartRadio monitors Docker performance

iHeartRadio uses Docker to isolate dependencies and resource usage of applications from each other, leveraging its ability to control dependencies and resource usage. However, monitoring Docker performance was a challenge due to lack of visibility into container-level resource consumption. They use Datadog for infrastructure monitoring, which collects CPU, memory, I/O, and network metrics from each Docker container and can aggregate metrics by any tag or tags. This allows iHeartRadio to monitor service-level metrics by aggregating by Docker image, breaking down network traffic by image and container, and correlating Docker performance with non-Docker services. Datadog also enables rapid changes in internal network traffic to trigger alerts, aiding investigation of issues that arise.

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