Prometheus CRD not deployed on istio prometheus installation

1

Hi all,

I am going to run the istio prometheus under a different externalUrl than /.

Therefore I wanted to deploy the following object:

---
apiVersion: monitoring.coreos.com/v1
kind: Prometheus
metadata:
  name: main
spec:
  replicas: 1
  version: {{ .Release.appVersion }}
  externalUrl: https://istio.domain/prometheus
  resources:
    requests:
      memory: 400Mi

But I get an error message when deploying it that the CRD monitoring.coreos.com is not found on my istio installation.

I found on the web, that the following CRD needs to be deployed: https://github.com/coreos/prometheus-operator/blob/60300f2baf8b02bc86d71672a76420476924af75/example/prometheus-operator-crd/prometheus.crd.yaml

Do I have to deploy that one or how do I get the CRD monitoring.coreos.com on the istio installation?

I installed istio 1.4.0 via the official helm charts.

Thanks in advance.

Best regards,
rforberger

2

You do need to install the prom operator, if you want to use Prometheus CRs, etc.

Take a look at the istio/installer install scripts, particularly: https://github.com/istio/installer/blob/106d947ff64df8ec05e53ea68cafab099bc60d2e/test/install.mk#L174.

3

@douglas-reid
Thanks for your info.
Is there also a helm chart for the prometheus operator to deploy in the istio namespace?

4

The helm chart for the prometheus operator is available in the prometheus operator repository, at the URL in the line I linked to from the installer. Any tailoring of that chart will need to be accomplished outside of Istio, as Istio is not a maintainer of those charts.

The helm charts for the Istio specific prom operator CRs are maintained in istio/installer, and allow for namespace customization.