The blog post details the process of deploying a sample application and Metricbeat in a Kubernetes environment managed by Elastic Cloud on Kubernetes (ECK) to facilitate data ingestion into an ECK-managed Elasticsearch cluster. It covers the instrumentation of a basic Node.js application with Elastic APM, including necessary configurations like obtaining the APM server URL and token. The post also explains how to expose the application and access it locally, while guiding users on setting up the APM UI to monitor transactions and metrics. Additionally, it describes deploying Metricbeat to collect and send metrics data to the Elasticsearch cluster securely, highlighting the importance of using ConfigMaps and Kubernetes secrets for SSL and connection configurations. The blog emphasizes that ECK, developed by the creators of the Elastic Stack, is an effective solution for securely managing and observing applications on Kubernetes.