Unable to get Stub status metrics in the Prometheus UI

[anmolsaini-hpe]

Hi Team,

I installed nginx and nginx exporter successfully using https://sysdig.com/blog/monitor-nginx-prometheus/

Now I want to enable stub stat metrics,

Here is the config map :

apiVersion: v1
data:
  nginx.conf: |
    events {}
    http {
        server {
            listen 80;
            location / {
                return 200 "hello world\n";
            }
            location /stub_status {
                stub_status;
                allow 127.0.0.1;  # Only allow local access
                deny all;  # Deny all other access
            }
        }
    }
kind: ConfigMap
metadata:
  creationTimestamp: "2024-07-31T07:30:42Z"
  name: nginx-config
  namespace: rda-dev
  resourceVersion: "450759929"
  uid: a84a8da8-90c1-4619-b972-e60b1a32a784

Here is the K8s deployment :

  spec:
        containers:
        - image: nginx:latest
          imagePullPolicy: Always
          name: nginx
          ports:
          - containerPort: 80
            protocol: TCP
          - containerPort: 443
            protocol: TCP
          resources: {}
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
          volumeMounts:
          - mountPath: /etc/nginx/nginx.conf
            name: nginx-config
            subPath: nginx.conf
        - args:
          - --nginx.scrape-uri=http://localhost/stub_status
          - --nginx.plus
          image: nginx/nginx-prometheus-exporter:latest
          imagePullPolicy: IfNotPresent
          name: nginx-exporter
          ports:
          - containerPort: 9113
            protocol: TCP
          resources:
            limits:
              cpu: 500m
              memory: 128Mi

I am able to see common metrics on my Prometheus but not able to see the stub stat metrics.

What configuration I am missing here?

[lucacome]

Hi @anmolsaini-hpe

Are you seeing any errors in any of the containers log?
I see that you have the --nginx.plus flag, are you using NGINX Plus? If so you might want to use the API instead of Stub status to get more metrics.

We also have an example here https://github.com/nginxinc/nginx-prometheus-exporter/tree/main/examples/kubernetes if you want to give that one a try, it might be easier to add an additional config like in that example instead of replacing /etc/nginx/nginx.conf entirely.