<p>I have an application running in EKS with istio service mesh, exposed using istio ingress and alb. Is there a tool to measure the amount of time (response time) taken by API request on each service? For instance, what time it reached ingress, then gateway and virtual service down to the pod?</p>

ILoveCode
<p>Istio access logs can be enabled to see different details.  Below is <a href="https://istio.io/latest/docs/tasks/observability/logs/access-log/" rel="nofollow noreferrer">default logging</a> format.</p>
<pre><code>[%START_TIME%] \&quot;%REQ(:METHOD)% %REQ(X-ENVOY-ORIGINAL-PATH?:PATH)% %PROTOCOL%\&quot; %RESPONSE_CODE% %RESPONSE_FLAGS% %RESPONSE_CODE_DETAILS% %CONNECTION_TERMINATION_DETAILS%
\&quot;%UPSTREAM_TRANSPORT_FAILURE_REASON%\&quot; %BYTES_RECEIVED% %BYTES_SENT% %DURATION% %RESP(X-ENVOY-UPSTREAM-SERVICE-TIME)% \&quot;%REQ(X-FORWARDED-FOR)%\&quot; \&quot;%REQ(USER-AGENT)%\&quot; \&quot;%REQ(X-REQUEST-ID)%\&quot;
\&quot;%REQ(:AUTHORITY)%\&quot; \&quot;%UPSTREAM_HOST%\&quot; %UPSTREAM_CLUSTER% %UPSTREAM_LOCAL_ADDRESS% %DOWNSTREAM_LOCAL_ADDRESS% %DOWNSTREAM_REMOTE_ADDRESS% %REQUESTED_SERVER_NAME% %ROUTE_NAME%\n
</code></pre>
<p>For istio <a href="https://istio.io/latest/docs/concepts/observability/" rel="nofollow noreferrer">observability </a> to <a href="https://istio.io/latest/docs/tasks/observability/kiali/" rel="nofollow noreferrer">visualize service mesh</a> please refer their documentation.</p>
