errors.fail

Welcome

Are you building up SLI/SLO dashboards or a monitoring solution? Would you like see the effect of a failing or degraded service? Then you can use the probing targets below to simulate these errors to test your monitoring and alerting rules.

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HTTPS Probe

The HTTPS endpoint can be configured to either return a 200 OK or a 500 Internal Server error. Blackbox Exporter will return a probe_success = 0 for the latter status code, indicating an error.

Endpoint:	curl -v https://probe.errors.fail/?Ndb9WF
Setting:

ICMP Probe (Ping)

Two endpoints are available for your ping probes. One endpoint drops ICMP request with a probabilty of 0.5, causing 50% packet loss.

No artificial packet loss:	ping probe.errors.fail
50% packet loss:	ping packetloss.errors.fail

Expired TLS/SSL Certificate

Did you know that Blackbox Exporter returns the number of days until expiry of a TLS/SSL certificate? You can easily build alert rules or dashboards using this information. There is an endpoint available with an expired certificate for you to play with.

Endpoint:

curl -v https://expired.errors.fail

Session Management

Your session ID is Ndb9WF. The session uniquely identifies you and is used to store your personal settings. Do not share it with anyone. If you would like to change it, click below to create a new session ID.

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Sample Configuration

Find below sample configuration for Prometheus, Blackbox Exporter and Grafana, as well as the Docker commands required to execute these tools.

Blackbox Exporter:

modules:
  http_2xx:
    prober: http
    timeout: 5s
    http:
      preferred_ip_protocol: ip4

Run Blackbox Exporter with: docker run --rm -d -p 9115:9115 --name blackbox_exporter -v `pwd`:/config prom/blackbox-exporter:master --config.file=/config/blackbox.yml

Prometheus:

global:
  scrape_interval: 15s
  scrape_timeout: 10s
  evaluation_interval: 15s
alerting:
  alertmanagers:
  - static_configs:
    - targets: []
    scheme: http
    timeout: 10s
    api_version: v1
scrape_configs:
- job_name: prometheus
  honor_timestamps: true
  scrape_interval: 15s
  scrape_timeout: 10s
  metrics_path: /metrics
  scheme: http
  static_configs:
  - targets:
    - localhost:9090
- job_name: blackbox
  metrics_path: /probe
  params:
    module: [http_2xx] # Looking for a HTTP 200 response.
  static_configs:
  - targets:
    - https://probe.errors.fail/?Ndb9WF
  relabel_configs:
  - source_labels: [__address__]
    target_label: __param_target
  - source_labels: [__param_target]
    target_label: instance
  - target_label: __address__
    replacement: host.docker.internal:9115

Run Prometheus with: docker run --name prometheus -v `pwd`/prometheus.yml:/etc/prometheus/prometheus.yml -d -p 9090:9090 prom/prometheus

Grafana

Run Grafana with: docker run -d --name=grafana -p 3000:3000 grafana/grafana

Then configure Prometheus running on http://host.docker.internal:9090 as data source and configure your dashboard.