openapi: 3.1.0
info:
  title: Thanos Compact Alerts Rules API
  description: The Thanos Compact HTTP API provides operational endpoints for the Compactor component, which runs as a singleton process applying Prometheus compaction procedures to TSDB blocks stored in object storage. It performs downsampling at 5-minute and 1-hour resolutions and enforces retention policies to reduce long-term storage costs.
  version: 0.35.0
  contact:
    name: Thanos Community
    url: https://thanos.io/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: http://localhost:10902
  description: Default Thanos Compact HTTP endpoint
tags:
- name: Rules
paths:
  /api/v1/rules:
    get:
      operationId: getRules
      summary: Get Alerting and Recording Rules
      description: Returns a list of alerting and recording rules that are currently loaded across connected Thanos Ruler and Prometheus instances.
      tags:
      - Rules
      parameters:
      - name: type
        in: query
        required: false
        description: Filter by rule type
        schema:
          type: string
          enum:
          - alert
          - record
      - name: match[]
        in: query
        required: false
        description: Filter rules by label matchers
        schema:
          type: array
          items:
            type: string
        style: form
        explode: true
      - $ref: '#/components/parameters/partial_response'
      responses:
        '200':
          description: Successful rules response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RulesResponse'
  /api/v1/alerts:
    get:
      operationId: getAlerts
      summary: Get Active Alerts
      description: Returns a list of all active alerts across connected Thanos Ruler and Prometheus instances.
      tags:
      - Rules
      parameters:
      - $ref: '#/components/parameters/partial_response'
      responses:
        '200':
          description: Successful alerts response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AlertsResponse'
components:
  schemas:
    RuleGroup:
      type: object
      properties:
        name:
          type: string
        file:
          type: string
        interval:
          type: number
          format: double
        rules:
          type: array
          items:
            oneOf:
            - $ref: '#/components/schemas/AlertingRule'
            - $ref: '#/components/schemas/RecordingRule'
        partialResponseStrategy:
          type: string
          description: Thanos-specific field for partial response handling
    RecordingRule:
      type: object
      properties:
        type:
          type: string
          enum:
          - recording
        name:
          type: string
        query:
          type: string
        labels:
          type: object
          additionalProperties:
            type: string
        health:
          type: string
        lastError:
          type: string
        lastEvaluation:
          type: string
          format: date-time
        evaluationTime:
          type: number
          format: double
    AlertingRule:
      type: object
      properties:
        type:
          type: string
          enum:
          - alerting
        name:
          type: string
        query:
          type: string
        duration:
          type: number
          format: double
        labels:
          type: object
          additionalProperties:
            type: string
        annotations:
          type: object
          additionalProperties:
            type: string
        alerts:
          type: array
          items:
            $ref: '#/components/schemas/Alert'
        health:
          type: string
        lastError:
          type: string
        lastEvaluation:
          type: string
          format: date-time
        evaluationTime:
          type: number
          format: double
        state:
          type: string
          enum:
          - firing
          - pending
          - inactive
    Alert:
      type: object
      properties:
        labels:
          type: object
          additionalProperties:
            type: string
        annotations:
          type: object
          additionalProperties:
            type: string
        state:
          type: string
          enum:
          - firing
          - pending
        activeAt:
          type: string
          format: date-time
        value:
          type: string
    RulesResponse:
      type: object
      required:
      - status
      - data
      properties:
        status:
          type: string
          enum:
          - success
        data:
          type: object
          properties:
            groups:
              type: array
              items:
                $ref: '#/components/schemas/RuleGroup'
    AlertsResponse:
      type: object
      required:
      - status
      - data
      properties:
        status:
          type: string
          enum:
          - success
        data:
          type: object
          properties:
            alerts:
              type: array
              items:
                $ref: '#/components/schemas/Alert'
  parameters:
    partial_response:
      name: partial_response
      in: query
      required: false
      description: If true, enables partial response. If a store is unavailable, partial data will be returned with a warning instead of failing the query.
      schema:
        type: boolean
        default: false
externalDocs:
  description: Thanos Compact Documentation
  url: https://thanos.io/tip/components/compact.md/