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website-monitoring

web-1

Monitore your websites availability, http status code (current and history), certificate, redirects and more with

Dependencies

Usage

  • git clone git@github.com:mbelloiseau/website-monitoring.git && cd website-monitoring
  • Edit config/prometheus/targets.yml (see targets.yml.example) or use ./gen_target.sh website-1.tld website-2.tld ...
  • Create and start containers docker-compose up -d
  • Visualize dashboards

If you already have Prometheus and Prometheus blackbox exporter up and running just import the dashboards (website-monitoring or overview) and use the right datasource and jobs (http_job and icmp_job)

Dashboards

Website monitoring

  • HTTP status code
  • HTTP redirects
  • HTTP version
  • TLS version
  • Certificate validity
  • ICMP
  • DNS lookup time
  • Availability over the last 24 hours, 3 days and 7 days
  • Probe duration and status code history

web-2 web-3

Overview

  • Total number of targets
  • Percentage of HTTP 200 status code
  • Percentage of targets using SSL
  • Global invalid status code history

overview

Tips and tricks

PromQL

Some useful PromQL queries

  • Number of days till certificate expiration
    • (probe_ssl_earliest_cert_expiry{instance=~"$target",job="$http_job"} - time()) / (60*60*24)
  • Display bad HTTP status code
    • probe_http_status_code{job="$http_job",instance=~"$target"} != 200
  • Count the number of each status code
    • count_values("code", probe_http_status_code)
  • Percentage of HTTP 200
    • ((count(count by (instance) (probe_http_status_code == 200))) / (count(count by (instance) (probe_http_status_code)))) * 100

Misc

  • Request blackbox exporter
    • curl -s "localhost:9115/probe?module=http_2xx&target=target.tld"