Before you Begin

  1. Install Maistra by following the instructions here.

  2. Deploy Bookinfo application by following these instructions.

Querying Metrics

  1. Generate network traffic by accessing the Bookinfo application:

    $ curl -o /dev/null http://$GATEWAY_URL/productpage
  2. A route to access the Prometheus UI should already exist. Query OpenShift for details of the route:

    $ oc get routes prometheus -n istio-system
    NAME         HOST/PORT                                  PATH      SERVICES     PORT              TERMINATION   WILDCARD
    prometheus             prometheus   http-prometheus                 None
  3. Open in a browser, you should see Prometheus' home screen, similar to this:

    prometheus home screen
  4. In the "Expression" input box enter istio_request_duration_seconds_count, and click the Execute button. You should see a screen similar to this:

    prometheus metrics
  5. It is possible to narrow down queries by using selectors. For example istio_request_duration_seconds_count{destination_workload="reviews-v2"} will only show counters with matching "destination_workload" label. For more information about using queries, please see Prometheus documentation.

  6. To list all available Prometheus metrics:

    $ oc get prometheus -n istio-system -o jsonpath='{.items[*].spec.metrics[*].name}'
    requests_total request_duration_seconds request_bytes response_bytes tcp_sent_bytes_total tcp_received_bytes_total

    Note that returned metric names need to be prepended with istio_ when used in queries, e.g. requests_total will become istio_requests_total.


Follow Bookinfo cleanup instructions to remove the application.