<p>I'm trying the prometheus-operator for the first time, and still struggling with the differences for managing Prometheus through that.</p>

<p>The deployment is pretty straight-forward, and so is editing the rules, however I could not find my way when trying to relabel the exporters using <code>static_configs</code> when using Prometheus-operator.</p>

<p>What I used to do in the past was to customize <code>prometheus.yml</code> and add <code>static_configs</code> to include the labels for each one of the exporter's job names.</p>

<p>I understand that under Prometheus-operator's hood we have the same settings as we usually have,  but I'm not sure how to achieve the same results from the <code>static_config</code> configuration using the operator. </p>

<p>From what I could understand I have to do set the relabelings now on the service monitors related to my exporters, however all the configurations I've tried had no results:</p>

<p>tried with <code>metricRelabelings</code> as descirbed on issue <a href="https://github.com/coreos/prometheus-operator/issues/1166" rel="noreferrer">1166</a>, and <code>StaticConfigs</code> as described on <a href="https://github.com/coreos/prometheus-operator/issues/1086" rel="noreferrer">issue 1086</a> without any luck.</p>

<p>For example this is what I used to do for <code>kubernetes-cadvisor</code> exporter to set a label on <code>static_config</code>, so that my custom label was displayed on all the metrics collected by my exporters on ingestion time:</p>

<pre><code>scrape_configs:
- job_name: prometheus
static_configs:
- targets: ['localhost:9090']
labels:
kubernetes_namespace: kube-system
cluster_name: mycluster01
</code></pre>

<p>And also add the <code>relabel_configs</code> on each of my exporters job's:</p>

<pre><code>
- job_name: 'kubernetes-cadvisor'
scheme: https
tls_config:
  ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
kubernetes_sd_configs:
- role: node
relabel_configs:
  - target_label: cluster_name
    replacement: mycluster01
  - target_label: kubernetes_namespace
    replacement: kube-system
  - action: labelmap
    regex: __meta_kubernetes_node_label_(.+)
  - target_label: __address__
    replacement: kubernetes.default.svc:443
  - source_labels: [__meta_kubernetes_node_name]
    regex: (.+)
    target_label: __metrics_path__
    replacement: /api/v1/nodes/${1}:10250/proxy/metrics
</code></pre>

<p>And this is an example for achieving the same using <code>metricRelabelings</code>, on Prometheus-operator which is still not working for me:</p>

<pre><code>apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    k8s-app: node-exporter
  name: node-exporter
  namespace: monitoring
spec:
  endpoints:
  - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
    interval: 30s
    port: https
    scheme: https
    tlsConfig:
      insecureSkipVerify: true
  jobLabel: k8s-app
  selector:
    matchLabels:
      k8s-app: node-exporter
  metricRelabelings:
    sourceLabels: __meta_kubernetes_node_name
    targetLabel: node
</code></pre>

<p>What I expect to achieve is to create a static label on my exporters so all the metrics carry the custom label that I define at the scraping time instead of having to manually define custom labels to all the deployments in my cluster.</p>

<p>Thanks in advance for any help!</p>

<p>Seems I've missed the instructions in the Operator repository.... After a closer look there I've found some very nice examples... seems the answer to my question is to create the additional scraping configuration as a secret, similar to the example at the following link: <a href="https://github.com/coreos/prometheus-operator/blob/master/example/additional-scrape-configs/additional-scrape-configs.yaml" rel="nofollow noreferrer">additional-scrape-configs.yaml</a></p>

<p>Some additional steps can also be found at the following: <a href="https://github.com/coreos/prometheus-operator/blob/master/Documentation/additional-scrape-config.md" rel="nofollow noreferrer">additional-scrape-config</a></p>
