How does Istio Observability work?

Question

Accepted Answer

**Istio Observability** — metrics, traces, dashboards without code changes.

**PromQL metrics:**
```promql
sum(rate(istio_requests_total{reporter="destination"}[5m])) by (destination_service)

histogram_quantile(0.95,
  sum(rate(istio_request_duration_milliseconds_bucket[5m])) by (le, destination_service)
)
```

**Kiali (visualization):**
```bash
kubectl apply -f https://raw.githubusercontent.com/istio/istio/release-1.19/samples/addons/kiali.yaml
istioctl dashboard kiali
```

**Jaeger (tracing):**
```bash
kubectl apply -f https://raw.githubusercontent.com/istio/istio/release-1.19/samples/addons/jaeger.yaml
istioctl dashboard jaeger
```

**OpenTelemetry + Istio:** OTel Collector for sending to Prometheus, Jaeger, Datadog.

DevOps: How does Istio Observability work?