How to get accurate per-route metrics from edge ?

[cebidhem]

Hello,

We have an api app reachable from the Internet through an ingress-nginx controller. I'm using Linkerd to get insights on metrics per routes, since ingress-nginx alone doesn't know routes, only path.

I've meshed my app namespace, and my ingress-nginx-controller, and I've created a ServiceProfile for my app service describing all the routes (generated from swagger).

I can see outbound metrics exported by the ingress-nginx-controller proxies, and inbound metrics exported by the app proxies.

I'm trying to understand the latencies for my app from the edge (meaning from the controller).

How can I achieve this with the set of metrics Linkerd gives us ? Should I use the ones exported by the controller as outbound ? Or the inbound by the app ? Or both ?

Thank you for your help!