Main Components of Istio : Service Mesh

Istio Pods and Services running inside Kubernetes Cluster

Istio Pods running in “istio-system” Namespace

List of Istio services :

1. Citadel : Auth, CA, handle TLS certificates to Envoy Proxy
2. EgressGateway:
3. Ingress: Load balancer with external IP
4. IngressGateway: NodePort
5. Pilot: registers all K8 cluster Services & Pod endpoints (IP),
6. Policy (Mixer):
7. StatsD-Prom-Bridge:
8. Telemetry:
9. Prometheus:

Only Ingress has a External IP. All other Istio Services will have internal IP.

Functionality of each Istio Component:

1. Pilot: you can query Pilot API to get Service Info & Service Endpoints info

Kube Service Name = “reviews”

Service-Key : reviews.default.svc.cluster.local

Info of all All Pods attached to “reviews” Service: ip address & Port