Change the grafana default Prometheus data source URL

[XzBuleSky]

What happened? Hello ! I modified the Prometheus parameter routePrefix when using the Prometheus-operator

apiVersion: monitoring.coreos.com/v1
kind: Prometheus
image: quay.io/prometheus/prometheus:v2.28.1
# add
routePrefix: /prometheus

When I tried to use Grafana, the default Prometheus data source did not work

I tried to change the URL address of the default data source and it didn't work, but I added the data source manually and it worked

So I went to the Yaml file about grafana

• cat manifests/grafana-dashboardDatasources.yaml | grep "datasources.yaml" | cut -d " " -f 4 | base64 -d

{
    "apiVersion": 1,
    "datasources": [
        {
            "access": "proxy",
            "editable": false,
            "name": "prometheus",
            "orgId": 1,
            "type": "prometheus",
            "url": "http://prometheus-k8s.monitoring.svc:9090",
            "version": 1
        }
    ]
}

I look for the Jsonnet file generated by this configuration

• cat vendor/grafana/grafana.libsonnet

...
    grafana+:: {
      labels: {
        'app.kubernetes.io/name': 'grafana',
        'app.kubernetes.io/version': $._config.versions.grafana,
        'app.kubernetes.io/component': 'grafana',
      },
      dashboards: {},
      rawDashboards: {},
      folderDashboards: {},
      datasources: [{
        name: 'prometheus',
        type: 'prometheus',
        access: 'proxy',
        orgId: 1,
        url: 'http://' + $._config.prometheus.serviceName + '.' + $._config.namespace + '.svc:9090',
        version: 1,
        editable: false,
      }],
...

I wrote my example.jsonnet file and modified it with the following configuration to get what I wanted, but I didn't think it was ideal

• example.jsonnet

local kp =
  (import 'kube-prometheus/main.libsonnet') +
  // Uncomment the following imports to enable its patches
  // (import 'kube-prometheus/addons/anti-affinity.libsonnet') +
  // (import 'kube-prometheus/addons/managed-cluster.libsonnet') +
  // (import 'kube-prometheus/addons/node-ports.libsonnet') +
  // (import 'kube-prometheus/addons/static-etcd.libsonnet') +
  // (import 'kube-prometheus/addons/custom-metrics.libsonnet') +
  // (import 'kube-prometheus/addons/external-metrics.libsonnet') +
  {
    values+:: {
      common+: {
        namespace: 'monitoring',
      },
    grafana+: {
         datasources+:: [{
           // url: grafana_value._config.grafana.datasources(self.url),
          name: 'prometheus',
          type: 'prometheus',
          access: 'proxy',
          orgId: 1,
          url: "http://prometheus-k8s.monitoring.svc:9090/prometheus",
          version: 1,
          editable: false,
         }],
    },
},
};

Did you expect to see some different? I want to change the value of datasources.url directly and leave the rest unchanged.

How should I write the example.jsonnet file correctly and effectively ?

How to reproduce it (as minimally and precisely as possible):

Environment

• Prometheus Operator version:

release-0.8

• Kubernetes version information:

Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.8", GitCommit:"5575935422cc1cf5169dfc8847cb587aa47bac5a", GitTreeState:"clean", BuildDate:"2021-06-16T13:00:45Z", GoVersion:"go1.15.13", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.8", GitCommit:"5575935422cc1cf5169dfc8847cb587aa47bac5a", GitTreeState:"clean", BuildDate:"2021-06-16T12:53:07Z", GoVersion:"go1.15.13", Compiler:"gc", Platform:"linux/amd64"}

<!-- Replace the command with its output above -->

• Kubernetes cluster kind:

  insert how you created your cluster: kops, bootkube, tectonic-installer, etc.

• Manifests:

insert manifests relevant to the issue

• Prometheus Operator Logs:

Insert Prometheus Operator logs relevant to the issue here

• Prometheus Logs:

Insert Prometheus logs relevant to the issue here

Anything else we need to know?:

[paulfantom]

Currently what you wrote is what is expected. Potentially after https://github.com/brancz/kubernetes-grafana/pull/117 is merged, we can make this simpler and allow modifying only one parameter.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had any activity in the last 60 days. Thank you for your contributions.

[github-actions[bot]]

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