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Dockerfile and code for a tiny Prometheus curlhttp exporter
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Curl HTTP exporter for Prometheus. Provides some useful metrics similar to the BlackBox exporter, but includes some useful information such as curl error numbers, to give you some more insight as to why a request might have failed.

New: SSL stuff

The following variables control SSL behavior:

  opt_certinfo: 1
  ssl_verifypeer: 0
  ssl_verifyhost: 0

Configuring opt_certinfo will enable the exporter to produce information about SSL certificate, the expiry time and the start time as separate metrics, you can group them by the unique signature extracted from the certificate. Example output:

curlhttp_certinfo{target="",subject_c="GB",subject_st="Greater Manchester",subject_l="Salford",subject_o="COMODO CA Limited",subject_cn="COMODO RSA Certification Authority",issuer_c="GB",issuer_st="Greater Manchester",issuer_l="Salford",issuer_o="COMODO CA Limited",issuer_cn="COMODO RSA Certification Authority",version="2",start_date="2010-01-19 00:00:00 GMT",expire_date="2038-01-18 23:59:59 GMT",signature="0a:.......:74:"} 1
curlhttp_certinfo_expire_date{target="",signature="0a:.......:74:"} 2147468399
curlhttp_certinfo_start_date{target="",signature="0a::.......:74:"} 1263855600


Use docker, really.


Edit config.yml


You can build and run manually, or use the build-run script to wipe and create the exporter image.


  1. git clone
  2. cd curlhttp_exporter
  3. bash build-run

Then check port 10080 or docker logs curlhttp_exporter

Sample Prometheus config

- job_name: curlhttp_exporter
    scrape_timeout: 15s
    scrape_interval: 20s
    metrics_path: /
    - targets:
    - source_labels: [__address__]
      target_label: __param_target
    - source_labels: [__param_target]
      target_label: instance
    - target_label: __address__
      replacement: IP_ADDR:10080 # exporter location
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