Prometheus

Prometheus Filter

Overview

Prometheus Filter Plugin to count Incoming Records

Configuration

PrometheusConfig

labels (Label, optional)

metrics ([]MetricSection, optional)

Metrics Section

Metrics Section

buckets (string, optional)

Buckets of record for instrumentation

desc (string, required)

Description of metric

key (string, optional)

Key name of record for instrumentation.

labels (Label, optional)

Additional labels for this metric

name (string, required)

Metrics name

type (string, required)

Metrics type counter, gauge, summary, histogram

Example Prometheus filter configurations

apiVersion: logging.banzaicloud.io/v1beta1
kind: Flow
metadata:
  name: demo-flow
spec:
  filters:
    - tag_normaliser: {}
    - parser:
        remove_key_name_field: true
        reserve_data: true
        parse:
          type: nginx
    - prometheus:
        metrics:
        - name: total_counter
          desc: The total number of foo in message.
          type: counter
          labels:
            foo: bar
        labels:
          host: ${hostname}
          tag: ${tag}
          namespace: $.kubernetes.namespace
  selectors: {}
  localOutputRefs:
    - demo-output

Fluentd config result:

  <filter **>
    @type prometheus
    @id logging-demo-flow_2_prometheus
    <metric>
      desc The total number of foo in message.
      name total_counter
      type counter
      <labels>
        foo bar
      </labels>
    </metric>
    <labels>
      host ${hostname}
      namespace $.kubernetes.namespace
      tag ${tag}
    </labels>
  </filter>
Last modified July 21, 2026: Merge 370578499f5e85ddb1e62b267b86d1aaf6c804aa into 3399d4d3bad17e3d9c4de6822c75a4ad4858b610 (7d8eee4)