Shim Injection for Running Containers
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Solution Overview
Problem
Existing container management systems face challenges in rapidly updating dependencies within container images to address vulnerabilities and maintain compatibility without causing downtime, especially when source code is unavailable or when dependencies are outdated.
Innovation Solution
An automated control system, such as a Kubernetes operator, that injects shims into running containers based on predefined criteria, allowing for the rerouting of API calls and altering functionality without shutting down the containers, thereby maintaining compatibility and security without requiring source code updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If container images are updated with new dependency versions to address vulnerabilities and compatibility issues, then security and compatibility are improved, but container downtime increases due to the need to shut down, rebuild, and redeploy containers
Solution Approach 1:
The system segments the dependency update process by separating the shim injection mechanism from the container runtime. The shim layer is injected independently into running containers, allowing dependency updates without requiring container shutdown or rebuild operations.
Solution Approach 2:
The patent introduces a shim as an intermediary layer between the container application and the underlying dependency libraries. This shim intercepts and redirects calls to updated dependencies, enabling security and compatibility fixes without directly modifying or restarting the container.
2Adaptability or versatility
If containers are shut down and rebuilt to update dependencies, then dependency versions are updated, but service availability deteriorates due to required downtime
Solution Approach 1:
The system performs preliminary actions by pre-compiling shims with the necessary dependency updates before injecting them into running containers. This allows the container to continue operating while the updated dependency interface is already prepared and ready for immediate activation.
Solution Approach 2:
The shim injection mechanism enables continuous operation of containers while dependency updates are applied. The shim layer maintains the call interception and redirection functionality throughout the update process, ensuring uninterrupted service availability while adapting dependency versions.
3Reliability
If manual updates of container dependencies are performed, then compatibility is maintained, but productivity decreases due to time-consuming manual intervention
Solution Approach 1:
The system implements self-service automation where the shim injection operator automatically scans for containers matching injection criteria, selects appropriate shims, and performs injection operations without manual intervention. The operator monitors and manages the entire update process autonomously, maintaining compatibility while dramatically improving update speed.
Solution Approach 2:
The automated operator incorporates feedback mechanisms by continuously monitoring container states, tracking injection progress, and adjusting operations based on real-time conditions. This feedback loop ensures compatibility is maintained while optimizing update throughput and productivity across multiple containers.
Data Source
AI summary
One example can include a system that can determine that a subset of containers in a distributed computing environment have characteristics that match a predefined set of shim injection criteria. The system can then inject respective copies of a shim into the subset of containers, while the subset of containers are running in the distributed computing environment. Each respective copy of the shim may be configured to intercept calls between software programs in a corresponding container.