Summary
Istio is an open-source service mesh designed to manage complex microservices architectures. It operates through a dual-plane architecture—comprised of a Control Plane and a Data Plane—to provide advanced traffic management, robust security (including zero-trust models), and deep observability for service-to-service communication within environments like Kubernetes.
Key findings
- Architectural Structure: Istio is divided into two distinct layers:
- Data Plane: Utilizes intelligent proxies based on the Envoy open-source project. These are typically deployed as "sidecars" alongside application containers to manage all network traffic between services [https://www.solo.io/topics/istio/istio-architecture; https://www.istioworkshop.io/03-servicemesh-overview/istio-architecture/].
- Control Plane: Functions as the central management unit (specifically via
Istiod). It converts high-level configuration resources—such asVirtualServices,DestinationRules, andAuthorizationPolicies—into