README.md

Exercise 8 - Telemetry

Configuring Istio to automatically gather telemetry data

1. Create a rule to collect telemetry data for your guestbook service.

   istioctl create -f guestbook/guestbook-telemetry.yaml

2. Run a script to generate a small work load for the app.

   while sleep 0.5; do curl http://$INGRESS_IP/hello/world; done

3. Wait until you see a few curl commands in your CLI.
4. Cancel the script by pressing Control + c.

Viewing the guestbook telemetry data

Grafana

1. Establish port forwarding from local port 3000 to the Grafana instance.

   kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=grafana \
   -o jsonpath='{.items[0].metadata.name}') 3000:3000

2. Browse to http://localhost:3000.

3. Navigate to the Istio dashboard.

Zipkin

1. Establish port forwarding from local port 9411 to the Zipkin instance.

   kubectl port-forward -n istio-system \
   $(kubectl get pod -n istio-system -l app=zipkin -o jsonpath='{.items[0].metadata.name}') \
   9411:9411

2. Browse to http://localhost:9411.

Prometheus

1. In a new terminal window, establish port forwarding from local port 9090 to the Prometheus instance.

   kubectl -n istio-system port-forward \
   $(kubectl -n istio-system get pod -l app=prometheus -o jsonpath='{.items[0].metadata.name}') \
   9090:9090

2. Browse to http://localhost:9090/graph.
3. In the Expression input box, enter: request_count.
4. Click Execute.

Service Graph

1. In a new terminal window, establish port forwarding from local port 8088 to the Service Graph instance.

   kubectl -n istio-system port-forward \
   $(kubectl -n istio-system get pod -l app=servicegraph -o jsonpath='{.items[0].metadata.name}') \
   8088:8088

2. Browse to http://localhost:8088/dotviz.

Mixer Log Stream

kubectl -n istio-system logs $(kubectl -n istio-system get pods -l istio=mixer -o jsonpath='{.items[0].metadata.name}') mixer | grep \"instance\":\"newlog.logentry.istio-system\"

Continue to Exercise 9 - Request Routing and Canary Deployments