PI server</li><li>Adding the Istio sidecar to every instance of a service</li><li>Ensuring requests are routed through the sidecars</li></ol><h2 id=setting-up-the-control-plane>Setting up the control plane</h2><p>Istio control plane consists of four main services: Pilot, Mixer, Citadel, and
the API server.</p><h3 id=api-server>API Server</h3><p>Istio's API server (based on Kubernetes&rsquo; API server) provides key functions
such as configuration management and Role-Based Access Control. The API
server requ