Restarting container every time I add a new URL

[JoaquinJimenezGarcia]

Host operating system: output of uname -a

Linux orion-master 5.10.63-v7+ #1457 SMP Tue Sep 28 11:25:31 BST 2021 armv7l GNU/Linux

blackbox_exporter version: output of blackbox_exporter --version

latest

What is the blackbox.yml module config.

modules:
  http_2xx:
    prober: http
    timeout: 5s
    http:
      valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]
      valid_status_codes: []
      method: GET
      preferred_ip_protocol: "ip4"
      ip_protocol_fallback: false
  icmp:
    prober: icmp
    icmp:
      preferred_ip_protocol: "ip4"
      ip_protocol_fallback: false

What is the prometheus.yml scrape config.

scrape_configs:
  - job_name: "website-monitoring-http"
    metrics_path: /probe
    params:
      module: [http_2xx]
    file_sd_configs:
      - files:
        - /etc/prometheus/targets.yml
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: blackbox-exporter:9115

What did you expect to see?

Every time I add a new URL to monitor under /etc/prometheus/targets.yml I am forced to restart the container in order to start gathering those metrics.

Is there anyway to read that config automatically without causing the outage? I am expecting to have more and more URL's added and don't want to force a reboot of the container.

Thank you in advance for the help!

[roidelapluie]

You can use file_sd instead of static_sd. The new url's would be picked automatically.

[JoaquinJimenezGarcia]

You can use file_sd instead of static_sd. The new url's would be picked automatically.

Could you please send a sample conf? I thought the file_sd was already declared with

    file_sd_configs:
      - files:
        - /etc/prometheus/targets.yml

Thanks!

[roidelapluie]

sorry, yes, that is the case. I suspect your file does not make it to the container or is on a filesystem that does not support inotify?

also, are you reloading prometheus? there might be a race if you update and reload at the same time.