View metrics

Metrics provide important information about the health of the apps in your cluster and the requests that reach your API Gateway. You can use these measures to detect failures, troubleshoot bottlenecks, and to find ways to improve the performance and reliability of your API Gateway.

1. Open the Prometheus UI.

2. Send multiple requests to the reviews page.
   

   • HTTP
   • HTTPS

   for ((i=1;i<=10;i++)); do curl -vik --resolve www.example.com:80:${INGRESS_GW_IP} http://www.example.com:80/reviews/1 ; done
   

   for ((i=1;i<=10;i++)); do curl -vik --resolve www.example.com:443:${INGRESS_GW_IP} https://www.example.com:443/reviews/1 ; done
   

3. From the Prometheus dashboard, enter the following PromQL query to see the requests that were sent to the ingress gateway.

   istio_requests_total
   

4. Explore other queries that you run in the Prometheus dashboard to gain insight into your API Gateway.