We recently built an application using the Lumen framework as a dockerized application and deployed it on a Kubernetes cluster (AWS EKS). We wanted to monitor the application using NewRelic APM as it helps you to analyze, troubleshoot and optimize applications easily. As we started to do this, we find out that integrating NewRelic APM with PHP containers and running on Kubernetes, the setup is not so easy.
After some struggle, we got it working and I decided to list the steps here if anyone needs it.
Another way to ensure the data is sent to NewRelic, you can check agent container logs and daemon container logs.