We added Kafka Exporter to provide additional metrics. But it seems that our own example files for configuring the Prometheus operator and our docs do configure it to scrape these metrics. Based on a Slack discussion (https://cloud-native.slack.com/archives/CMH3Q3SNP/p1573775472031900), following option can help to scrape it:

  additionalServiceMonitors:
    - name: "kafka-exporter"
      selector:
        matchLabels:
          strimzi.io/name: my-cluster-kafka-exporter
      namespaceSelector:
        any: true
      endpoints:
        - port: metrics
          interval: 10s
          path: /metrics

We should incorporate this into our examples and docs.

Created by Strimzi#2193.