Update docs to use stat-inbound and stat-outbound

[adleong]

No description provided.

[kflynn]

@adleong This looks great! 🙂

[kflynn]

So much better. 🙂

[alpeb]

I'm actually not seeing the probe entries in my testing 🤔

[adleong]

that's odd. are they present in the proxy metrics? does your cluster use a non-default probe network cidr?

[alpeb]

My cluster is a plain vanilla k3d cluster. I've got these probe metrics for webapp:

response_total{direction="inbound",target_addr="10.42.0.28:7000",target_ip="10.42.0.28",target_port="7000",tls="no_identity",no_tls_reason="no_tls_from_remote",srv_group="",srv_kind="default",srv_name="all-unauthenticated",route_group="",route_kind="default",route_name="probe",authz_group="",authz_kind="default",authz_name="probe",status_code="200",classification="success",grpc_status="",error=""} 97
response_total{direction="inbound",target_addr="0.0.0.0:4191",target_ip="0.0.0.0",target_port="4191",tls="no_identity",no_tls_reason="no_tls_from_remote",srv_group="",srv_kind="default",srv_name="all-unauthenticated",route_group="",route_kind="default",route_name="probe",authz_group="",authz_kind="default",authz_name="probe",status_code="200",classification="success",grpc_status="",error=""} 193

According to linkerd/linkerd2#12994, the route_names for these are getting overwritten with "default" because route_kind is "default":

func inboundKeyForSample(sample *model.Sample, resource *pb.Resource) inboundRowKey {
	labels := sample.Metric
	server := (string)(labels["srv_name"])
	route := (string)(labels["route_name"])
	routeType := (string)(labels["route_kind"])
	if labels["srv_kind"] == "default" {
		server = "[default]"
	}
	if labels["route_name"] == "default" {
		route = "[default]"
	}
	if labels["route_kind"] == "default" {
		routeType = ""
		route = "[default]"
	}

	return inboundRowKey{
		name:      (string)(labels[prometheus.ResourceType(resource)]),
		server:    server,
		route:     route,
		port:      (string)(labels["target_port"]),
		routeType: routeType,
	}
}

[adleong]

oh, good catch! fixed in the Linkerd PR.