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Prometheus scrape Metrics

Fluent Bit 1.9 and later includes additional metrics features to let you collect logs and metrics from a Prometheus-based endpoint at a set interval. These metrics can be routed to metric supported endpoints such as Prometheus Exporter, InfluxDB or Prometheus Remote Write.

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Configuration

Key
Description
Default

bearer_token

Set the bearer token for authentication with the Prometheus endpoint.

none

buffer_max_size

Set the maximum buffer size for the HTTP response.

10M

host

The host of the Prometheus metric endpoint to scrape.

localhost

http_passwd

Set the password for HTTP basic authentication.

""

http_user

Set the username for HTTP basic authentication.

none

metrics_path

The metrics URI endpoint, which must start with a forward slash (/). Parameters can be added to the path by using ?

/metrics

port

The port of the Prometheus metric endpoint to scrape.

9100

scrape_interval

The interval to scrape metrics.

10s

threaded

Indicates whether to run this input in its own thread.

false

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TLS configuration

This plugin supports TLS/SSL for secure connections to HTTPS endpoints. For detailed TLS configuration options, refer to the TLS/SSL documentation section.

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Example

If an endpoint exposes Prometheus Metrics you can specify the configuration to scrape and then output the metrics. The following example retrieves metrics from the HashiCorp Vault application.

pipeline:
  inputs:
    - name: prometheus_scrape
      host: 0.0.0.0
      port: 8201
      tag: vault
      metrics_path: /v1/sys/metrics?format=prometheus
      scrape_interval: 10s

  outputs:
    - name: stdout
      match: '*'

This returns output similar to:

PreviousPrometheus remote writeNextPrometheus text file

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