Longhorn Nodes API
Node management for the Longhorn storage cluster including listing nodes, updating disk configurations, enabling or disabling scheduling, and managing node tags for workload placement.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Longhorn Manager Nodes API
description: The Longhorn Manager REST API provides programmatic access to all Longhorn storage management operations.
version: '1.11'
contact:
name: Longhorn Community
url: https://longhorn.io/community/
servers:
- url: http://{longhornManagerHost}:{longhornManagerPort}
description: Longhorn Manager API server (in-cluster via service or port-forward)
variables:
longhornManagerHost:
default: longhorn-backend
description: Hostname or service name for the Longhorn Manager.
longhornManagerPort:
default: '9500'
description: Port on which Longhorn Manager serves the API.
security:
- bearerAuth: []
tags:
- name: Nodes
description: Node management for the Longhorn storage cluster including listing nodes, updating disk configurations, enabling or disabling scheduling, and managing node tags for workload placement.
paths:
/v1/nodes:
get:
operationId: listNodes
summary: Longhorn List nodes
description: Returns a list of all nodes in the Longhorn storage cluster. Each node entry includes its scheduling eligibility, disk configurations, conditions, tags, and current state.
tags:
- Nodes
responses:
'200':
description: Node list retrieved successfully.
content:
application/json:
schema:
$ref: '#/components/schemas/NodeCollection'
'401':
$ref: '#/components/responses/Unauthorized'
/v1/nodes/{nodeId}:
get:
operationId: getNode
summary: Longhorn Get a node
description: Returns detailed information about a specific node including all configured disks, their storage capacity, scheduling status, tags, and health conditions.
tags:
- Nodes
parameters:
- $ref: '#/components/parameters/nodeId'
responses:
'200':
description: Node details retrieved successfully.
content:
application/json:
schema:
$ref: '#/components/schemas/Node'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
put:
operationId: updateNode
summary: Longhorn Update a node
description: Updates a node's configuration including scheduling eligibility, disk configurations, eviction status, and node tags for workload placement affinity.
tags:
- Nodes
parameters:
- $ref: '#/components/parameters/nodeId'
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/NodeUpdateInput'
responses:
'200':
description: Node updated successfully.
content:
application/json:
schema:
$ref: '#/components/schemas/Node'
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
components:
schemas:
DiskStatus:
type: object
description: Observed status of a disk on a Longhorn node.
properties:
storageAvailable:
type: integer
description: Available storage on this disk in bytes.
storageMaximum:
type: integer
description: Total capacity of this disk in bytes.
storageScheduled:
type: integer
description: Storage allocated to replicas on this disk in bytes.
conditions:
type: object
description: Health conditions for this disk.
additionalProperties:
type: object
NodeCollection:
type: object
description: A collection of Longhorn node resources.
properties:
data:
type: array
description: List of node resources.
items:
$ref: '#/components/schemas/Node'
DiskSpec:
type: object
description: Configuration for a disk on a Longhorn node.
properties:
path:
type: string
description: File system path to the disk or directory used for Longhorn storage.
allowScheduling:
type: boolean
description: Whether new replicas can be scheduled on this disk.
evictionRequested:
type: boolean
description: Whether eviction of replicas from this disk has been requested.
storageReserved:
type: integer
description: Amount of storage reserved on this disk in bytes, not available for Longhorn.
tags:
type: array
description: Tags for this disk used in replica placement affinity.
items:
type: string
NodeUpdateInput:
type: object
description: Input for updating a Longhorn node.
properties:
allowScheduling:
type: boolean
description: Whether to allow new replicas to be scheduled on this node.
evictionRequested:
type: boolean
description: Whether to request eviction of all replicas from this node.
disks:
type: object
description: Updated disk configurations for the node.
additionalProperties:
$ref: '#/components/schemas/DiskSpec'
tags:
type: array
description: Updated list of node tags.
items:
type: string
APIError:
type: object
description: API error response.
properties:
type:
type: string
description: Error type identifier.
status:
type: integer
description: HTTP status code.
code:
type: string
description: Machine-readable error code.
message:
type: string
description: Human-readable error message.
Node:
type: object
description: A Longhorn storage node with configured disks and scheduling settings.
properties:
id:
type: string
description: Node identifier, matching the Kubernetes node name.
name:
type: string
description: Name of the node.
allowScheduling:
type: boolean
description: Whether new replicas can be scheduled on this node.
evictionRequested:
type: boolean
description: Whether replica eviction has been requested for this node.
disks:
type: object
description: Map of disk configurations on this node keyed by disk name.
additionalProperties:
$ref: '#/components/schemas/DiskSpec'
diskStatus:
type: object
description: Status of each disk on the node.
additionalProperties:
$ref: '#/components/schemas/DiskStatus'
tags:
type: array
description: Tags applied to this node for workload placement affinity.
items:
type: string
conditions:
type: object
description: Node health conditions.
additionalProperties:
type: object
parameters:
nodeId:
name: nodeId
in: path
required: true
description: Identifier of the Longhorn node (typically the Kubernetes node name).
schema:
type: string
responses:
NotFound:
description: The requested resource was not found.
content:
application/json:
schema:
$ref: '#/components/schemas/APIError'
BadRequest:
description: The request was malformed or contained invalid parameters.
content:
application/json:
schema:
$ref: '#/components/schemas/APIError'
Unauthorized:
description: Authentication credentials are missing or invalid.
content:
application/json:
schema:
$ref: '#/components/schemas/APIError'
securitySchemes:
bearerAuth:
type: http
scheme: bearer
description: Kubernetes service account token for authenticating with the Longhorn Manager API. Typically passed via the Kubernetes API proxy.
externalDocs:
description: Longhorn Documentation
url: https://longhorn.io/docs/