Sentinel Agent
The Sentinel agent is Lutflow's real-time GPU cost monitoring component. It continuously looks up GPU compute hourly rates from AI providers, transforming passive cost observation into a live financial oracle embedded directly inside the workload's execution environment. Zero application changes required. Compatible with Kubernetes and GKE.
Technical Explanation
The Sentinel agent is deployed as a Kubernetes sidecar container or DaemonSet alongside AI inference workloads. It intercepts compute metrics at the infrastructure level — GPU utilization, memory allocation, inference throughput — and prices them against real-time hourly rates from AI providers and GPU cloud marketplaces. The Sentinel maintains a continuously updated pricing index and calculates the real-time cost of every running inference workload. When a workload's accrued cost approaches or exceeds a budget threshold, the Sentinel triggers enforcement actions: alerts, throttling, model downgrading, or workload termination (the 'kill path'). The kill path latency is under 1ms. Installation requires zero application code changes — the Sentinel runs below the application layer.
Business Explanation
The Sentinel answers one question at all times: 'What is this inference workload costing right now, priced against current GPU hourly rates?' For CFOs, this eliminates billing surprises — you know the cost before the invoice arrives. For FinOps teams, it provides the real-time cost feed that existing tools lack. For CTOs, it provides infrastructure-level cost monitoring without requiring developers to instrument their code.
Lookup → Flow → Value
The Sentinel is the Lookup layer in the Lookup → Flow → Value framework. It performs the continuous lookup of real-time GPU pricing from AI providers, creating the pricing intelligence that feeds into the Flow (enforcement) and Value (optimization) stages.
Related Terms
Frequently Asked Questions
What is the Sentinel agent?+
A real-time GPU cost monitoring component that prices every inference workload against current GPU hourly rates. Deployed as a Kubernetes sidecar with zero code changes.
Does it require application changes?+
No. The Sentinel runs below the application layer as a Kubernetes sidecar or DaemonSet. No code instrumentation or SDK integration required.
How fast is the kill path?+
Under 1ms. When a workload breaches budget policy, the Sentinel triggers enforcement immediately.