Istio: The Enterprise Upgrade Path to Microservices

This blog post introduces Istio, a service mesh for containerized applications that uses Envoy sidecars and a control plane (Pilot, Mixer, Citadel, Galley, Gateway) to provide out-of-the-box telemetry, mutual TLS, traffic control (circuit breaking, fault injection, rollout strategies), and service-level RBAC; it explains architecture, deployment approaches (istioctl/kube-inject or admission webhook), adoption best practices, and highlights security and operational trade-offs.