openapi: 3.0.3
info:
  title: Fluent Bit Monitoring HTTP Build Metrics API
  description: Fluent Bit exposes an embedded HTTP server for runtime monitoring, internal metrics, storage statistics, health checks, and hot reloading. Endpoints are available under v1 (legacy) and v2 (current) paths and respond in JSON, Prometheus 0.0.4, or cmetrics text format.
  version: 2.0.0
  contact:
    name: Fluent Bit
    url: https://docs.fluentbit.io/manual/administration/monitoring
servers:
- url: http://127.0.0.1:2020
  description: Default HTTP server (configurable via http_listen and http_port)
tags:
- name: Metrics
paths:
  /api/v1/metrics:
    get:
      tags:
      - Metrics
      summary: Internal metrics (v1, JSON)
      description: Display internal metrics per loaded plugin.
      responses:
        '200':
          description: Plugin metrics
          content:
            application/json:
              schema:
                type: object
                properties:
                  input:
                    type: object
                    additionalProperties: true
                  filter:
                    type: object
                    additionalProperties: true
                  output:
                    type: object
                    additionalProperties: true
  /api/v1/metrics/prometheus:
    get:
      tags:
      - Metrics
      summary: Internal metrics (v1, Prometheus)
      responses:
        '200':
          description: Prometheus 0.0.4 exposition
          content:
            text/plain; version=0.0.4:
              schema:
                type: string
  /api/v2/metrics:
    get:
      tags:
      - Metrics
      summary: Internal metrics (v2, cmetrics)
      responses:
        '200':
          description: cmetrics text exposition
          content:
            text/plain:
              schema:
                type: string
  /api/v2/metrics/prometheus:
    get:
      tags:
      - Metrics
      summary: Internal metrics (v2, Prometheus)
      responses:
        '200':
          description: Prometheus 0.0.4 exposition
          content:
            text/plain; version=0.0.4:
              schema:
                type: string