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Safe Inspection of Live Virtual Machines

Published: 08 April 2017 Publication History

Abstract

With DevOps automation and an everything-as-code approach to lifecycle management for cloud-native applications, challenges emerge from an operational visibility and control perspective. Once a VM is deployed in production it typically becomes a hands-off entity in terms of restrictions towards inspecting or tuning it, for the fear of negatively impacting its operation. We present CIVIC (Cloning and Injection based VM Inspection for Cloud), a new mechanism that enables safe inspection of unmodified production VMs on-the-fly. CIVIC restricts all impact and side-effects of inspection or analysis operations inside a live clone of the production VM. New functionality over the replicated VM state is introduced using code injection. In this paper, we describe the design and implementation of our solution over KVM/QEMU. We demonstrate four of its use-cases-(i) safe reuse of system monitoring agents, (ii) impact-heavy problem diagnostics and troubleshooting, (iii) attaching an intrusive anomaly detector to a live service, and (iv) live tuning of a webserver's configuration parameters. Our evaluation shows CIVIC is nimble and lightweight in terms of memory footprint as well as clone activation time (6.5s), and has a low impact on the original VM (< 10%).

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cover image ACM Conferences
VEE '17: Proceedings of the 13th ACM SIGPLAN/SIGOPS International Conference on Virtual Execution Environments
April 2017
261 pages
ISBN:9781450349482
DOI:10.1145/3050748
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Published: 08 April 2017

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Author Tags

  1. Cloud
  2. Code Injection
  3. Data Center
  4. DevOps
  5. Inspection
  6. Live Cloning
  7. Monitoring
  8. Sandboxing
  9. Virtual Machine
  10. Virtualization

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VEE '17 Paper Acceptance Rate 18 of 43 submissions, 42%;
Overall Acceptance Rate 80 of 235 submissions, 34%

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