Cannot use Metricbeat Prometheus module to scrape Blackbox Exporter

[Amit_Yaari]

I am trying to use Metricbeat’s Prometheus module to collect results from the Blackbox Exporter (prom/blackbox-exporter), which probes services using the /probe endpoint.

I want to probe internal service health endpoints (e.g., /health) using Blackbox and then collect the resulting metrics (probe_success, probe_duration_seconds, etc.) using Metricbeat, and send them to Elasticsearch.

In Prometheus, we added the following scrape config:

scrape_configs:

• job_name: blackbox
  metrics_path: /probe
  params:
  module: [http_2xx]
  static_configs:
  • targets:
    • http://service-a.namespace.svc:8080/health
    • http://service-b.namespace.svc:8080/health
      relabel_configs:
  • source_labels: [address]
    target_label: __param_target
  • source_labels: [__param_target]
    target_label: instance
  • target_label: address
    replacement: blackbox-exporter.namespace.svc:9115

This setup worked perfectly.
But now I want to scrape the metrics using Metricbeat instead of Prometheus.

I tried to configure Metricbeat’s prometheus module like this:

metricbeat.modules:

• module: prometheus
  metricsets: ["collector"]
  period: 30s
  hosts:
  • "http://blackbox-exporter.namespace.svc:9115"
    metrics_path: /probe
    params:
    module: ["http_2xx"]
    target: ["http://service-a.namespace.svc:8080/health"]

Actual behavior: Metricbeat either:

• Ignores the params: field entirely (query string not included in the request)
• Fails with errors or timeouts (as it tries to scrape /probe without required target param)

Any suggestions?