> ## Documentation Index > Fetch the complete documentation index at: https://docs.ankra.ai/llms.txt > Use this file to discover all available pages before exploring further. # Change Control Plane Instance Type Endpoint ## OpenAPI ````yaml https://platform.ankra.app/openapi.json put /api/v1/clusters/hetzner/{cluster_id}/control-plane/instance-type openapi: 3.1.0 info: title: FastAPI version: 0.1.0 servers: - url: https://platform.ankra.app security: [] tags: - name: Clusters description: Create, inspect and manage clusters, and the stacks deployed on them. - name: Managed Clusters description: Provider-managed control planes, driven through one common surface. - name: Imported Clusters description: Clusters that already existed and were connected to Ankra. - name: Cluster Access description: Kubeconfigs, service-account tokens and per-cluster access grants. - name: Kubernetes description: Read and act on the Kubernetes objects inside a cluster. - name: DigitalOcean Clusters description: Provision and manage DigitalOcean Kubernetes clusters. - name: Hetzner Clusters description: Provision and manage Hetzner Kubernetes clusters. - name: OVH Clusters description: Provision and manage OVH Kubernetes clusters. - name: Scaleway Clusters description: Provision and manage Scaleway Kapsule clusters. - name: UpCloud Clusters description: Provision and manage UpCloud Kubernetes clusters. - name: Applications description: Deploy, configure and observe applications across the fleet. - name: Stack Profiles description: Reusable stack definitions, their versions and sharing. - name: Charts description: Browse the chart catalogue behind stacks and addons. - name: Helm description: Helm registries, credentials and the charts they expose. - name: Executions description: Long-running platform executions and their jobs. - name: Operations description: Cancel in-flight cluster operations and their jobs. - name: Chat description: Conversational sessions, plans and confirmable actions. - name: AI Agent Runs description: Autonomous agent runs and their outcomes. - name: AI Tickets description: The AI ticket board, its sync connections and settings. - name: AI Playbooks description: Reusable playbooks the AI lanes execute. - name: AI Conditions description: Conditions that gate AI autonomy. - name: AI Engineering Handoffs description: Work the AI lanes escalate to a human engineer. - name: AI Environment description: The environment and base stacks AI demos deploy into. - name: Security description: Findings, advisories, SBOMs, compliance and posture. - name: Cost description: Cluster and fleet cost, rate cards and cost settings. - name: Billing description: Subscription and spend caps. - name: Organisation description: Members, invitations, audit logs and organisation settings. - name: Account Tokens description: Personal access tokens for the API and CLI. - name: Credentials description: The shared credential store. - name: Azure Credentials description: Azure credentials and SSH keys. - name: DigitalOcean Credentials description: DigitalOcean credentials and SSH keys. - name: Hetzner Credentials description: Hetzner credentials and SSH keys. - name: OVH Credentials description: OVH credentials and SSH keys. - name: Scaleway Credentials description: Scaleway credentials. - name: UpCloud Credentials description: UpCloud credentials and SSH keys. - name: Data Source Credentials description: Credentials for metrics and log sources. - name: DNS Credentials description: Credentials for DNS providers. - name: DNS description: DNS zones and records, including custom organisation zones. - name: Cloudflare description: Cloudflare domains and the credentials behind them. - name: Variables description: Organisation- and cluster-scoped variables. - name: SOPS description: Encrypt and decrypt values with the organisation SOPS config. - name: Alerts description: Alert integrations and ingest credentials. - name: Notifications description: Notification routes and their delivery targets. - name: Support description: Support tickets. paths: /api/v1/clusters/hetzner/{cluster_id}/control-plane/instance-type: put: tags: - Hetzner Clusters summary: Change Control Plane Instance Type Endpoint operationId: >- change_control_plane_instance_type_endpoint_api_v1_clusters_hetzner__cluster_id__control_plane_instance_type_put parameters: - in: path name: cluster_id required: true schema: format: uuid title: Cluster Id type: string - in: header name: authorization required: false schema: anyOf: - type: string - type: 'null' title: Authorization - in: header name: x-ankra-organisation-id required: false schema: anyOf: - type: string - type: 'null' title: X-Ankra-Organisation-Id requestBody: content: application/json: schema: $ref: '#/components/schemas/ChangeControlPlaneInstanceTypeRequest' required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/ChangeControlPlaneInstanceTypeResult' description: Successful Response '401': description: Unauthorized '404': description: Not found '422': content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' description: Validation Error components: schemas: ChangeControlPlaneInstanceTypeRequest: properties: force_drain: default: false description: >- Rolling lane only. Bypass PodDisruptionBudgets when draining each controller. Off by default: a PDB is a workload owner's stated availability requirement. title: Force Drain type: boolean instance_type: description: >- The new instance type for every control plane node. On a stopped cluster it is applied at the next start; on a running cluster with at least three controllers it is rolled out live, one controller at a time, each drained and waited back to healthy before the next. minLength: 1 title: Instance Type type: string required: - instance_type title: ChangeControlPlaneInstanceTypeRequest type: object ChangeControlPlaneInstanceTypeResult: properties: mode: description: >- Which lane the request took: 'offline' rewrote a stopped cluster's plan, 'rolling' is the live one-controller-at-a-time path on a running cluster. It describes the lane, not whether work was dispatched - read operation_id for that. enum: - offline - rolling title: Mode type: string new_instance_type: title: New Instance Type type: string operation_id: anyOf: - format: uuid type: string - type: 'null' description: >- The operation to poll, when the request dispatched one. Null whenever nothing was dispatched: on the offline lane, which applies the new size at the next cluster start (its own operation), and on either lane when the control planes already run the requested type (updated is 0). Decide whether to poll by testing operation_id for null, not by reading mode. title: Operation Id previous_instance_type: title: Previous Instance Type type: string updated: title: Updated type: integer required: - previous_instance_type - new_instance_type - updated - mode title: ChangeControlPlaneInstanceTypeResult type: object HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' title: Detail type: array title: HTTPValidationError type: object ValidationError: properties: loc: items: anyOf: - type: string - type: integer title: Location type: array msg: title: Message type: string type: title: Error Type type: string required: - loc - msg - type title: ValidationError type: object ````