Company
Date Published
Author
Adel Haj Hassan
Word count
907
Language
English
Hacker News points
None

Summary

In Kubernetes environments, applications commonly communicate with the Datadog Agent to transmit telemetry data using DogStatsD and Datadog APM, with communication modes managed by the Datadog Cluster Agent's Admission Controller. Traditionally, utilizing Unix domain sockets (UDS) for this purpose is preferred due to better performance and speed, but it requires mounting socket files via hostPath volumes, which conflicts with non-privileged Pod Security Standards (PSS). To address this, Datadog has introduced a Container Storage Interface (CSI) driver that allows UDS sockets to be mounted into pods using CSI volumes instead, ensuring compatibility with all PSS levels while maintaining security. The CSI driver supports multiple mount types for observability sockets, integrates with the Datadog Admission Controller for seamless adoption, and future updates plan to enhance support for APM Single Step Instrumentation libraries. This CSI-based method allows Kubernetes users to leverage UDS-based observability efficiently and securely within environments that adhere to strict security standards.