Exporter operation modes

Exporter can work in 2 modes:

• classic:
  • targets are configured in targets.ini
  • /metrics endpoint is used to receive metrics
• prober:
  • targets are configured on the Prometheus side
  • /prober&target= is used
  • targets.ini should be empty

Each operation mode requires an rbl.ini, for example:

[rbl]
server=ix.dnsbl.manitu.net

Prober mode provides additional features over classic:

1. dynamic configuration of targets on Prometheus side
2. different query/check interval of queries for different targets (e.g. to work around strict rate limits of the DNSBL)
3. set different query settings by utilizing probes modules (not yet implemented)

classic

The following examples configure scraping of metrics from this exporter in classic mode.

Example for a targets.ini:

[targets]
server=smtp.fastmail.com

Prometheus

scrape_configs:
  - job_name: 'dnsbl-exporter'
    metrics_path: /metrics
    static_configs:
      - targets: ['127.0.0.1:9211']

For more details, see the Prometheus scrape config documentation.

Prometheus Operator

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: dnsbl-exporter
  namespace: dnsbl-exporter
spec:
  endpoints:
    - interval: 30s
      port: http-9211
      scrapeTimeout: 5s
  jobLabel: dnsbl-exporter
  namespaceSelector:
    matchNames:
      - dnsbl-exporter
  selector:
    matchLabels:
      app.kubernetes.io/instance: dnsbl-exporter
      app.kubernetes.io/name: dnsbl-exporter

You can use a ServiceMonitor or PodMonitor, for more details, see the Operator ServiceMonitor documentation or Operator PodMonitor documentation.

prober

The following examples configure scraping of metrics from this exporter in prober mode.

Prometheus

scrape_configs:
  - job_name: 'dnsbl-exporter-prober'
    metrics_path: /prober
    params:
      module: [ips]
    static_configs:
      - targets:
        - smtp.fastmail.com
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:9211 # The dnsbl exporter's real hostname:port.
  - job_name: 'dnsbl-exporter-metrics' # collect dnsbl exporter's operational metrics.
    static_configs:
      - targets: ['127.0.0.1:9211']

For more details, see the Prometheus scrape config documentation.

Prometheus Operator

apiVersion: monitoring.coreos.com/v1
kind: Probe
metadata:
  name: dnsbl-exporter-prober
  namespace: dnsbl-exporter
spec:
  interval: 30s
  jobName: dnsbl-exporter-prober
  module: ips
  prober:
    path: /prober
    scheme: http
    url: dnsbl-exporter.dnsbl-exporter.svc:9211 # Kubernetes dnsbl exporter's service
  scrapeTimeout: 5s
  targets:
    staticConfig:
      static:
        - smtp.fastmail.com
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: dnsbl-exporter-metrics # collect dnsbl exporter's operational metrics.
  namespace: dnsbl-exporter
spec:
  endpoints:
    - interval: 30s
      port: http-9211
      scrapeTimeout: 5s
  jobLabel: dnsbl-exporter-metrics
  namespaceSelector:
    matchNames:
      - dnsbl-exporter
  selector:
    matchLabels:
      app.kubernetes.io/instance: dnsbl-exporter
      app.kubernetes.io/name: dnsbl-exporter

For more details, see the Operator Probe documentation.

In addition, you can use a ServiceMonitor or PodMonitor to monitor the dnsbl-exporter’s operational metrics, for more details, see the Operator ServiceMonitor documentation or Operator PodMonitor documentation.