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Optimizing Intra-Container Communication with Memory Protection Keys: A Novel Approach to Secure and Efficient Microservice Interaction

Fnu Yashu, Shubham Malhotra, Muhammad Saqib

TL;DR

MPKLink addresses intra-container microservice communication overhead by leveraging Intel Memory Protection Keys to secure and accelerate shared-memory IPC. It extends MPK usage from data-at-rest to memory-in-transit, enabling dynamic, fine-grained access control among co-located services and reducing protocol overhead compared with REST and gRPC. A Rust-based benchmark evaluates MPKLink against multiple IPC methods, showing competitive performance for small messages and strong isolation, while exposing scalability challenges for large payloads due to PKRU synchronization. The work also outlines PKI-based authentication and compiler-assisted signing to facilitate integration with container orchestration platforms, signaling practical impact for secure, efficient microservice interactions.

Abstract

In modern cloud-native applications, microservices are commonly deployed in containerized environments to ensure scalability and flexibility. However, inter-process communication (IPC) between co-located microservices often suffers from significant overhead, especially when traditional networking protocols are employed within containers. This paper introduces a novel approach, MPKLink, leveraging Intel Memory Protection Keys (MPK) to enhance intra-container communication efficiency while ensuring security. By utilizing shared memory with MPK-based access control, we eliminate unnecessary networking latencies, leading to reduced resource consumption and faster response times. We present a comprehensive evaluation of MPKLink, demonstrating its superior performance over conventional methods such as REST and gRPC within microservice architectures. Furthermore, we explore the integration of this approach with existing container orchestration platforms, showcasing its seamless adoption in real-world deployment scenarios. This work provides a transformative solution for developers looking to optimize communication in microservices while maintaining the integrity and security of containerized applications.

Optimizing Intra-Container Communication with Memory Protection Keys: A Novel Approach to Secure and Efficient Microservice Interaction

TL;DR

MPKLink addresses intra-container microservice communication overhead by leveraging Intel Memory Protection Keys to secure and accelerate shared-memory IPC. It extends MPK usage from data-at-rest to memory-in-transit, enabling dynamic, fine-grained access control among co-located services and reducing protocol overhead compared with REST and gRPC. A Rust-based benchmark evaluates MPKLink against multiple IPC methods, showing competitive performance for small messages and strong isolation, while exposing scalability challenges for large payloads due to PKRU synchronization. The work also outlines PKI-based authentication and compiler-assisted signing to facilitate integration with container orchestration platforms, signaling practical impact for secure, efficient microservice interactions.

Abstract

In modern cloud-native applications, microservices are commonly deployed in containerized environments to ensure scalability and flexibility. However, inter-process communication (IPC) between co-located microservices often suffers from significant overhead, especially when traditional networking protocols are employed within containers. This paper introduces a novel approach, MPKLink, leveraging Intel Memory Protection Keys (MPK) to enhance intra-container communication efficiency while ensuring security. By utilizing shared memory with MPK-based access control, we eliminate unnecessary networking latencies, leading to reduced resource consumption and faster response times. We present a comprehensive evaluation of MPKLink, demonstrating its superior performance over conventional methods such as REST and gRPC within microservice architectures. Furthermore, we explore the integration of this approach with existing container orchestration platforms, showcasing its seamless adoption in real-world deployment scenarios. This work provides a transformative solution for developers looking to optimize communication in microservices while maintaining the integrity and security of containerized applications.
Paper Structure (20 sections, 3 figures, 1 table)

This paper contains 20 sections, 3 figures, 1 table.

Table of Contents

  1. Introduction
  2. Threat Model
  3. Contributions
  4. Background
  5. gRPC
  6. Inter Process Communication (IPC)
  7. Named Pipes
  8. UNIX Domain Sockets
  9. Shared Memory
  10. Problems with Shared Memory
  11. Lack of Fine-Grained Access Control
  12. Synchronization Overhead
  13. Copying Overhead
  14. Intel Memory Protection Keys (MPK)
  15. System Design
  16. ...and 5 more sections

Figures (3)

  • Figure 1: Benchmarking MPKLink
  • Figure 2: Overview of all results for all four IPC methods
  • Figure 3: Overview of small results for all four IPC methods