Adding Persistent Volume to Prometheus using kube-prometheus

[pslobo]

Hi,

I apologise if this has been covered before, but I'm attempting to add persistence to Prometheus by means of a PVC (will likely migrate to something like Thanos at a later date). I haven't however managed to figure out how to accomplish this.

From what I've seen elsewhere, I should be able to do something like this:

local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
local pvc = k.core.v1.persistentVolumeClaim;

{
  prometheus+:: {
    prometheus+: {
      spec+: {
        storage: {
          volumeClaimTemplate:
            pvc.new() +
            pvc.mixin.spec.withAccessModes('ReadWriteOnce') +
            pvc.mixin.spec.resources.withRequests({ storage: '50Gi' }) +
            pvc.mixin.spec.withStorageClassName('fast-disks') +
            pvc.mixin.spec.selector.withMatchLabels({}),
        },
      },
    },
  },
}

Source: This is old though.

However, this didn't work and when looking at prometheus.libsonnet I don't really see storage in the spec so unsure where I need to override this is at all possible.

Really appreciate any pointers in the right direction here.

[pslobo]

NVM. Managed to get this working by following the example in prometheus-pvc.yaml. It wasn't working initially because I have misplaced some information and that was messing up the rest of the jssonnet output.