Istio Has a Free API — Service Mesh for Kubernetes with Zero Code Changes

Istio is the most popular service mesh for Kubernetes. It adds traffic management, security, and observability between your services — without changing a single line of application code. Free, open source, CNCF graduated. Used by eBay, Airbnb, and Salesforce. Why Use Istio? Zero code changes — sidecar proxy handles everything Traffic management — canary deployments, A/B testing, traffic splitting mTLS everywhere — automatic mutual TLS between all services Observability — distributed tracing, metrics, and access logs Rate limiting — per-service or per-endpoint rate limits Quick Setup 1. Install istioctl install --set profile = demo kubectl label namespace default istio-injection = enabled 2. Traffic Splitting (Canary) kubectl apply -f - << EOF apiVersion: networking.istio.io/v1beta1 kind: VirtualService metadata: name: my-app spec: hosts: [my-app] http: - route: - destination: host: my-app subset: v1 weight: 90 - destination: host: my-app subset: v2 weight: 10 EOF 3. Check Proxy Status