Prometheus instance label control

https://www.robustperception.io/checking-if-ssh-is-responding-with-prometheus/

wget https://github.com/prometheus/prometheus/releases/download/v2.0.0/prometheus-2.0.0.linux-amd64.tar.gz
tar -xzf prometheus-*.tar.gz
cd prometheus-*
cat <<'EOF' > prometheus.yml
global:
  scrape_interval: 10s
scrape_configs:
  - job_name: 'blackbox'
    metrics_path: /probe
    params:
      module: [ssh_banner]
    static_configs:
      - targets:
        - 127.0.0.1   # Targets to probe
    relabel_configs:
      # Ensure port is 22, pass as URL parameter
      - source_labels: [__address__]
        regex: (.*?)(:.*)?
        replacement: ${1}:22
        target_label: __param_target
      # Make instance label the target
      - source_labels: [__param_target]
        target_label: instance
      # Actually talk to the blackbox exporter though
      - target_label: __address__
        replacement: 127.0.0.1:9115
EOF
./prometheus

https://valyala.medium.com/how-to-use-relabeling-in-prometheus-and-victoriametrics-8b90fc22c4b2 https://www.robustperception.io/controlling-the-instance-label/

https://grafana.com/blog/2022/03/21/how-relabeling-in-prometheus-works/

https://prometheus.io/docs/concepts/jobs_instances/#:~:text=In%20Prometheus%20terms%2C%20an%20endpoint,example%2C%20is%20called%20a%20job.

https://medium.com/geekculture/single-prometheus-job-for-dozens-of-blackbox-exporters-2a7ba492d6c8

https://prometheus.io/blog/2015/06/01/advanced-service-discovery/