Istio

Istio is an open-source service mesh that provides a transparent and powerful way to secure, connect and observe microservices running on a distributed architecture such as kubernetes. It's designed to address service-to-service communication challenges in modern cloud-native applications without requiring changes to application code. At it's core, Istio uses "Envoy", a high-performance proxy deployed as a sidecar alongside each service.

It provides features such as:

• Traffic management
• Security (mTLS, authentication and authorization between services)
• Observability (integration with Prometheus, Graffana, Jaeger, etc.)
• Policy enforcement

It also supports ingress capabilities to manage incoming traffic via an Ingress Gateway, decoupling traffic control from application logic.