README.md

Exercise 8 - Telemetry

Generate Guestbook Telemetry data

Generate a small load to the application either using a shell script or fortio:

With simple shell script:

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

Or, with fortio:

docker run istio/fortio load -t 5m -qps 5 \
  http://$INGRESS_IP

Grafana

Establish port forward 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

If you are in Cloud Shell, you'll need to use Web Preview and Change Port to 3000.

Browse to http://localhost:3000 and navigate to the different Istio Dashboards. On the left select the "Dashboards" logo, then click "Manage", then select the "Istio Mesh Dashboard" and "Istio Performance Dashboard"

Prometheus

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

If you are in Cloud Shell, you'll need to use Web Preview and Change Port to 9090.

Browse to http://localhost:9090/graph and in the “Expression” input box enter: istio_request_bytes_count. Click the Execute button.

Service Graph

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

If you are in Cloud Shell, you'll need to use Web Preview and Change Port to 8088. Once opened, you'll see 404 not found error. This is normal because / is not handled. Append the URI with /force/forcegraph.html, e.g.: http://8088-dot-...-dot-devshell.appspot.com/force/forcegraph.html

If not in Cloud Shell, then browse to http://localhost:8088/force/forcegraph.html

Continue to Exercise 9 - Distributed Tracing