Merge branch 'jl-fix-nginx-metrics' into 'master'

Fix nginx metric names

Closes #45163

See merge request gitlab-org/gitlab-ce!18770

config/prometheus/additional_metrics.yml

@@ -103,10 +103,10 @@
   - title: "Throughput"
     y_label: "Requests / Sec"
     required_metrics:
-      - nginx_responses_total
+      - nginx_server_requests
     weight: 1
     queries:
-    - query_range: 'sum(rate(nginx_responses_total{server_zone!="*", server_zone!="_", %{environment_filter}}[2m])) by (status_code)'
+    - query_range: 'sum(rate(nginx_server_requests{server_zone!="*", server_zone!="_", %{environment_filter}}[2m])) by (code)'
       unit: req / sec
       label: Status Code
       series:
@@ -121,19 +121,19 @@
   - title: "Latency"
     y_label: "Latency (ms)"
     required_metrics:
-      - nginx_upstream_response_msecs_avg
+      - nginx_server_requestMsec
     weight: 1
     queries:
-    - query_range: 'avg(nginx_upstream_response_msecs_avg{%{environment_filter}})'
+    - query_range: 'avg(nginx_server_requestMsec{%{environment_filter}})'
       label: Upstream
       unit: ms
   - title: "HTTP Error Rate"
     y_label: "HTTP 500 Errors / Sec"
     required_metrics:
-      - nginx_responses_total
+      - nginx_server_requests
     weight: 1
     queries:
-    - query_range: 'sum(rate(nginx_responses_total{status_code="5xx", %{environment_filter}}[2m]))'
+    - query_range: 'sum(rate(nginx_server_requests{code="5xx", %{environment_filter}}[2m]))'
       label: HTTP Errors
       unit: "errors / sec"
 - group: System metrics (Kubernetes)

doc/user/project/integrations/prometheus_library/nginx.md

@@ -10,17 +10,19 @@ The [Prometheus service](../prometheus.md) must be enabled.
 
 ## Metrics supported
 
+NGINX server metrics are detected, which tracks the pages and content directly served by NGINX.
+
 | Name | Query |
 | ---- | ----- |
-| Throughput (req/sec) | sum(rate(nginx_responses_total{server_zone!="*", server_zone!="_", %{environment_filter}}[2m])) by (status_code) |
-| Latency (ms) | avg(nginx_upstream_response_msecs_avg{%{environment_filter}}) |
-| HTTP Error Rate (HTTP Errors / sec) | rate(nginx_responses_total{status_code="5xx", %{environment_filter}}[2m])) |
+| Throughput (req/sec) | sum(rate(nginx_server_requests{server_zone!="*", server_zone!="_", %{environment_filter}}[2m])) by (code) |
+| Latency (ms) | avg(nginx_server_requestMsec{%{environment_filter}}) |
+| HTTP Error Rate (HTTP Errors / sec) | sum(rate(nginx_server_requests{code="5xx", %{environment_filter}}[2m])) |
 
 ## Configuring Prometheus to monitor for NGINX metrics
 
 To get started with NGINX monitoring, you should first enable the [VTS statistics](https://github.com/vozlt/nginx-module-vts)) module for your NGINX server. This will capture and display statistics in an HTML readable form. Next, you should install and configure the [NGINX VTS exporter](https://github.com/hnlq715/nginx-vts-exporter) which parses these statistics and translates them into a Prometheus monitoring endpoint.
 
-If you are using NGINX as your Kubernetes ingress, there is [upcoming direct support](https://github.com/kubernetes/ingress/pull/423) for enabling Prometheus monitoring in the 0.9.0 release.
+If you are using NGINX as your Kubernetes ingress, GitLab will [automatically detect](nginx_ingress.md) the metrics once enabled in 0.9.0 and later releases.
 
 ## Specifying the Environment label