Apache Solr

Apache Solr Collections API

The Solr Collections API provides REST endpoints for managing SolrCloud collections, shards, replicas, and aliases. It supports collection creation, deletion, modification, shard splitting, replica management, collection backup/restore, alias management, and cross-datacenter replication (CDCR) configuration.

Documentation GitHub OpenAPI

Operations 2

GET /solr/admin/collections Invoke a Collections / Cluster API action (v1) #

POST /api/collections/{collection}/balance-shard-unique Distribute a property evenly across nodes for a collection #

Documentation

📖

Documentation

https://solr.apache.org/guide/solr/latest/deployment-guide/cluster-node-management.html

Specifications

⚙

OpenAPI

https://raw.githubusercontent.com/api-evangelist/apache-solr/refs/heads/main/openapi/apache-solr-collections-api-openapi.yml

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Apache Solr HTTP Collections API
  version: 9.x
  description: 'A best-effort OpenAPI 3.1 description of selected endpoints from the Apache

    Solr HTTP API, including the Collections (Cluster/Node Management), Schema,

    and v2 cluster APIs. Solr''s full APIs are exposed as v1 (action-style query

    parameters under `/solr/admin/*`) and v2 (resource-style paths under

    `/api/*`). Authentication is optional but BasicAuth is supported when the

    Solr `BasicAuthPlugin` is enabled.'
  contact:
    name: Apache Solr
    url: https://solr.apache.org/
  license:
    name: Apache-2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: http://{host}:{port}
  description: Default Solr server
  variables:
    host:
      default: localhost
    port:
      default: '8983'
tags:
- name: Collections
  description: Manage SolrCloud collections, replicas, and nodes
paths:
  /solr/admin/collections:
    get:
      tags:
      - Collections
      summary: Invoke a Collections / Cluster API action (v1)
      operationId: collectionsAction
      parameters:
      - name: action
        in: query
        required: true
        description: Action name (e.g. CLUSTERSTATUS, CLUSTERPROP, BALANCESHARDUNIQUE, REPLACENODE, DELETENODE, ADDROLE, REMOVEROLE, OVERSEERSTATUS)
        schema:
          type: string
          enum:
          - CLUSTERSTATUS
          - CLUSTERPROP
          - BALANCESHARDUNIQUE
          - REPLACENODE
          - DELETENODE
          - ADDROLE
          - REMOVEROLE
          - OVERSEERSTATUS
      - name: collection
        in: query
        required: false
        schema:
          type: string
      - name: shard
        in: query
        required: false
        schema:
          type: string
      - name: name
        in: query
        required: false
        schema:
          type: string
      - name: val
        in: query
        required: false
        schema:
          type: string
      - name: node
        in: query
        required: false
        schema:
          type: string
      - name: sourceNode
        in: query
        required: false
        schema:
          type: string
      - name: targetNode
        in: query
        required: false
        schema:
          type: string
      - name: role
        in: query
        required: false
        schema:
          type: string
      - name: async
        in: query
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Action response
          content:
            application/json:
              schema:
                type: object
  /api/collections/{collection}/balance-shard-unique:
    parameters:
    - name: collection
      in: path
      required: true
      schema:
        type: string
    post:
      tags:
      - Collections
      summary: Distribute a property evenly across nodes for a collection
      operationId: balanceShardUnique
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - property
              properties:
                property:
                  type: string
                onlyactivenodes:
                  type: boolean
                shardUnique:
                  type: boolean
      responses:
        '200':
          description: Balance accepted
components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: Enabled when Solr's BasicAuthPlugin is configured