traefik expose internal metrics - traefik

Question

I would like to expose internal metrics of traefik.
After reading the documentation I created the following configuration file:
logLevel = "INFO"
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.dashboard]
address = ":16081"
# API definition
[api]
entryPoint = "dashboard"
dashboard = true
debug = false
[api.statistics]
recentErrors = 10
# Metrics definition
[metrics]
# DataDog metrics exporter type
[metrics.datadog]
address = "172.17.0.1:8125"
pushInterval = "10s"
################################################################
# Mesos/Marathon Provider
################################################################
# Enable Marathon Provider.
[marathon]
endpoint = "http://mesos.lan:8080/"
watch = true
domain = "service.lan"
exposedByDefault = false
When I query the dashboard entrypoint I got a 404 error on /metrics:
curl -s http://localhost:16081/health | jq
{
"pid": 1,
"uptime": "3h31m3.5252748s",
"uptime_sec": 12663.5252748,
"time": "2018-09-04 16:53:17.7128687 +0000 UTC m=+12663.602939001",
"unixtime": 1536079997,
"status_code_count": {},
"total_status_code_count": {
"404": 5
},
"count": 0,
"total_count": 5,
"total_response_time": "390.7µs",
"total_response_time_sec": 0.0003907,
"average_response_time": "78.14µs",
"average_response_time_sec": 7.814e-05,
"recent_errors": [
{
"status_code": 404,
"status": "Not Found",
"method": "GET",
"host": "localhost:16081",
"path": "/metrics",
"time": "2018-09-04T16:53:12.0232879Z"
},
{
"status_code": 404,
"status": "Not Found",
"method": "GET",
"host": "localhost:16081",
"path": "/metrics",
"time": "2018-09-04T13:18:52.7206202Z"
},
{
"status_code": 404,
"status": "Not Found",
"method": "GET",
"host": "localhost:16081",
"path": "/metrics",
"time": "2018-09-04T13:18:51.853093Z"
},
{
"status_code": 404,
"status": "Not Found",
"method": "GET",
"host": "localhost:16081",
"path": "/metrics",
"time": "2018-09-04T13:18:50.9894516Z"
},
{
"status_code": 404,
"status": "Not Found",
"method": "GET",
"host": "localhost:16081",
"path": "/metrics",
"time": "2018-09-04T13:18:49.8598176Z"
}
]
}
curl -s http://localhost:16081/metrics
404 page not found
Did I miss something ?
My main objective is to be able to get metrics per frontend/backend.
I would like to be able to know the number of requests and returned status code per frontend.
Thanks,
Renaud

Answer 1

This is solved, long story short, /metrics is only exposed when promotheus provider is enable. When Datadog provider is enable all the metrics are sent to datadog.
Details can be found here: github.com/containous/traefik/issues/3877