How to change the prometheus scrapeInterval

[betonetotbo]

How can I change the default scrapeInterval: 30s to something like scrapeInterval: 10s ?

[betonetotbo]

I found a way to do this after applying the manifests, with this command:

kubectl -n monitoring patch prometheus/k8s --type=json --patch='[{"op":"replace","path":"/spec/scrapeInterval","value":"15s"}]'

This will patch the PrometheusSpec object setting the scrapeInterval to 15s. After a while the prometheus-operator will apply this new configuration to the prometheus instance.

[paulfantom]

You can also apply this jsonnet patch:

prometheus+: {
  prometheus+: {
    spec+: {
      scrapeInterval: "15s",
    },
  },
},

[betonetotbo]

Worked!

Just for curiosity, I was trying to add it inside the values, but it'll not work. It must be a neighbor of values:

local kp =
  (import 'kube-prometheus/main.libsonnet') +
  {
    values+:: {
      common+: {
        namespace: 'monitoring',
      },
      // here will not work!
    },
    // here it works!
  };

[paulfantom]

Correct. Currently, only a subset of Prometheus CRD options are supported in values, but all are available by directly modifying prometheus.prometheus.spec. We are working on bringing this support in values in #1477