Lens and Custom Prometheus installation. Metrics are not visible => "404 page not found".

[JWebDev]

Hello. I installed Prometheus official Prometheus with Helm charts. Lens detects Prometheus иut it doesn't show metrics. I can imagine why. But in the Lance logs there is only a general message and it does not indicate which metric is not available.

This solution doesn't work either: https://github.com/lensapp/lens/blob/master/troubleshooting/custom-prometheus.md#manual I looked at several metrics from here, I have them all. Probably the labels don't match somewhere. https://github.com/lensapp/lens/tree/master/packages/technical-features/prometheus/src

There is a connection to the service, Lens automatically detects the service.

If anyone needs it, here is an example of the service. Don't forget to add appropriate labels to the deployment.

apiVersion: v1
kind: Service
metadata:
  name: lens-metrics-service
  namespace: prometheus
  labels:
    app: prometheus
    component: server
    heritage: Helm
    release: prometheus
spec:
  selector:
    app: prometheus
    component: server
    heritage: Helm
  ports:
    - name: http
      protocol: TCP
      port: 80
      targetPort: 9090

Now let's move on to the errors. I won't show anything new here.

Lens logs.

info: [CONTEXT-HANDLER]: using helm14 as prometheus provider for clusterId=1c2fcf927d9e8fc6637202d3fdbcc498
warn: [METRICS-ROUTE]: failed to get metrics for clusterId=1c2fcf927d9e8fc6637202d3fdbcc498: Metrics not available {"stack":"Error: Metrics not available\n    at loadMetricHelper (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:35829:31)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async Promise.all (index 3)\n    at async C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:35874:36\n    at async Object.route (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:34859:32)\n    at async Router.route (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:35090:9)\n    at async LensProxy.handleRequest (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:33367:13)"}
info: [CLUSTER]: refresh {"accessible":true,"disconnected":false,"id":"1c2fcf927d9e8fc6637202d3fdbcc333","name":"infra","online":true,"ready":true}
info: [CLUSTER]: refresh {"accessible":true,"disconnected":false,"id":"8843900644ce20e50683bc6d40a31bfb","name":"app","online":true,"ready":true}
info: [CONTEXT-HANDLER]: using helm14 as prometheus provider for clusterId=1c2fcf927d9e8fc6637202d3fdbcc333
warn: [METRICS-ROUTE]: failed to get metrics for clusterId=1c2fcf927d9e8fc6637202d3fdbcc333: Metrics not available {"stack":"Error: Metrics not available\n    at loadMetricHelper (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:35829:31)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async Promise.all (index 6)\n    at async C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:35874:36\n    at async Object.route (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:34859:32)\n    at async Router.route (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:35090:9)\n    at async LensProxy.handleRequest (C:\\Users\\JDev\\AppData\\Local\\Programs\\Lens\\resources\\app.asar\\node_modules\\@lensapp\\core\\static\\build\\library\\main.js:33367:13)"}
info: [CLUSTER]: refresh {"accessible":true,"disconnected":false,"id":"1c2fcf927d9e8fc6637202d3fdbcc333","name":"infra","online":true,"ready":true}

Lens developer console.

Can someone please tell me how I can see which request(metric) has an error and what exactly is missing? If I know which metric isn't working, I can see what's wrong(probably other labels).

Prometheus installation: https://artifacthub.io/packages/helm/prometheus-community/prometheus

At the moment, the latest version of Lens and Prometheus are installed.

Thanks.

[RobCannon]

I am having the same error. I have a Prometheus proxy to Grafana cloud. It is working for prometheus-adapter, but Lens does not like it. I with Lens would document what metrics APIs it is calling as well as what logic it uses for auto-detecting Prometheus. But since it has been 8 months with no update here, I am not going to hold my breath.