AI Inference Service Mesh

Apply Istio/Linkerd mesh controls to secure and optimize east-west AI traffic across inference microservices.

Why Mesh for AI

• Enforce mTLS between gateway, retriever, reranker, and model services

• Apply fine-grained traffic policies without app code changes

• Run progressive delivery for model-serving backends

• Observe latency hops for retrieval + generation chains

Core Patterns

Security

• mTLS strict mode cluster-wide

• AuthorizationPolicy per service account

• Egress policies for approved model endpoints only

Traffic Management

• Canary by header or percentage for new model versions

• Retry budgets tuned for long-running streaming requests

• Circuit breakers to protect overloaded inference backends

Resilience

• Outlier detection on failing pods

• Locality-aware routing in multi-zone clusters

• Failover to secondary cluster/provider

Observability

• Capture distributed traces across the full AI request path

• Emit service-level and route-level p95/p99 latency

• Segment metrics by model and tenant labels

Pitfalls to Avoid

• Aggressive timeouts that break streaming responses

• Blanket retries that amplify expensive generation calls

• Missing identity boundaries between tenant-facing and internal services

Related Skills

• service-mesh - Foundational mesh concepts

• llm-gateway - North-south API gateway controls

• opentelemetry - End-to-end tracing and metrics