Exercice 22

Déployer le blackbox exporter

mkdir /opt/prometheus/blackbox

wget https://raw.githubusercontent.com/prometheus/blackbox_exporter/master/example.yml -O /opt/prometheus/blackbox/blackbox.yml

Ajouter au docker-compose.yml:

  blackbox:
    image: prom/blackbox-exporter:master
    ports:
    - 9115:9115
    command: "--config.file=/config/blackbox.yml"
    volumes:
    - "/opt/prometheus/blackbox:/config"

Sujet

Configurer prometheus pour qu'il scrape les métriques des probe du blackbox exporter pour le site orange.fr

Attention, bien utiliser le module http_2xx_example à la place de http_2xx

Solution

show

# file:prometheus.yml
- job_name: blackbox
  file_sd_configs:
  - files:
    - ./targets/blackbox/*.yml
    refresh_interval: "15s"
  metrics_path: /probe
  params:
    module: [http_2xx_orange_fr]
  relabel_configs:
  - source_labels: [__address__]
    target_label: __param_target
  - source_labels: [__param_target]
    target_label: instance
  - target_label: __address__
    replacement: 10.102.28.71:9115


# file:./targets/blackbox/orange-targets.yml
- targets:
  - orange.fr
  labels:
    node: promXX

Suite à la modification dans le docker-compose.yml effectuer :


docker-compose up -d

Note: Pour redémarrer le blackbox exporter :

docker-compose restart blackbox

Sujet

Trouver le code retour HTTP du site orange.fr tel que récupéré depuis le blackbox exporter

Solutions

show

probe_http_status_code{instance="orange.fr"}

Sujet

Résoudre le soucis en modifiant les headers HTTP dans la configuration du blackbox exporter

Solutions

show


#file: /opt/prometheus/blackbox/blackbox.yml
modules:
  http_2xx_orange_fr:
    prober: http
    timeout: 5s
    http:
      valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]
      valid_status_codes: []  # Defaults to 2xx
      method: GET
      headers:
        Host: orange.fr
        Accept-Language: en-US
        Origin: orange.fr
      follow_redirects: true
      fail_if_ssl: false
      fail_if_not_ssl: false
      fail_if_body_matches_regexp:
        - "Could not connect to database"
      fail_if_body_not_matches_regexp:
        - "[Oo]range"
      fail_if_header_matches: [] # Verifies that no cookies are set
      fail_if_header_not_matches:
        - header: Set-Cookie
          allow_missing: true
          regexp: '.*'
      tls_config:
        insecure_skip_verify: false
      preferred_ip_protocol: "ip4" # defaults to "ip6"
      ip_protocol_fallback: false  # no fallback to "ip6"

Sujet

Trouver le temps de réponse global d'orange.fr

Solution

show

probe_duration_seconds{instance="orange.fr"}
sum by (instance) (probe_http_duration_seconds{instance="orange.fr"})

Formation Prometheus