Istio

Istio is an open-source service mesh that transparently layers onto distributed applications to manage traffic, enforce security, and collect telemetry.

Istio simplifies microservice operations by decoupling network management from application code. Running as a dedicated infrastructure layer, it controls traffic flow with fine-grained routing (such as canary deployments and circuit breaking) while securing service-to-service communication via mutual TLS (mTLS) and identity-based authorization. By leveraging Envoy proxies alongside a unified control plane, Istio automatically generates rich telemetry (including distributed tracing and performance metrics) to give operators deep visibility into complex, multi-cloud Kubernetes deployments without requiring code changes.

https://istio.io