swagger: '2.0'
info:
  title: Firecracker Actions Drives API
  description: RESTful public-facing API. The API is accessible through HTTP calls on specific URLs carrying JSON modeled data. The transport medium is a Unix Domain Socket.
  version: 1.16.0-dev
  termsOfService: ''
  contact:
    email: firecracker-maintainers@amazon.com
  license:
    name: Apache 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
host: localhost
basePath: /
schemes:
- http
consumes:
- application/json
produces:
- application/json
tags:
- name: Drives
paths:
  /drives/{drive_id}:
    put:
      summary: Creates or updates a drive. Pre-boot only.
      description: Creates new drive with ID specified by drive_id path parameter. If a drive with the specified ID already exists, updates its state based on new input. Will fail if update is not possible.
      operationId: putGuestDriveByID
      parameters:
      - name: drive_id
        in: path
        description: The id of the guest drive
        required: true
        type: string
      - name: body
        in: body
        description: Guest drive properties
        required: true
        schema:
          $ref: '#/definitions/Drive'
      responses:
        204:
          description: Drive created/updated
        400:
          description: Drive cannot be created/updated due to bad input
          schema:
            $ref: '#/definitions/Error'
        default:
          description: Internal server error.
          schema:
            $ref: '#/definitions/Error'
      tags:
      - Drives
    patch:
      summary: Updates the properties of a drive. Post-boot only.
      description: Updates the properties of the drive with the ID specified by drive_id path parameter. Will fail if update is not possible.
      operationId: patchGuestDriveByID
      parameters:
      - name: drive_id
        in: path
        description: The id of the guest drive
        required: true
        type: string
      - name: body
        in: body
        description: Guest drive properties
        required: true
        schema:
          $ref: '#/definitions/PartialDrive'
      responses:
        204:
          description: Drive updated
        400:
          description: Drive cannot be updated due to bad input
          schema:
            $ref: '#/definitions/Error'
        default:
          description: Internal server error.
          schema:
            $ref: '#/definitions/Error'
      tags:
      - Drives
definitions:
  PartialDrive:
    type: object
    required:
    - drive_id
    properties:
      drive_id:
        type: string
      path_on_host:
        type: string
        description: Host level path for the guest drive. This field is optional for virtio-block config and should be omitted for vhost-user-block configuration.
      rate_limiter:
        $ref: '#/definitions/RateLimiter'
  RateLimiter:
    type: object
    description: Defines an IO rate limiter with independent bytes/s and ops/s limits. Limits are defined by configuring each of the _bandwidth_ and _ops_ token buckets. This field is optional for virtio-block config and should be omitted for vhost-user-block configuration.
    properties:
      bandwidth:
        $ref: '#/definitions/TokenBucket'
        description: Token bucket with bytes as tokens
      ops:
        $ref: '#/definitions/TokenBucket'
        description: Token bucket with operations as tokens
  TokenBucket:
    type: object
    description: Defines a token bucket with a maximum capacity (size), an initial burst size (one_time_burst) and an interval for refilling purposes (refill_time). The refill-rate is derived from size and refill_time, and it is the constant rate at which the tokens replenish. The refill process only starts happening after the initial burst budget is consumed. Consumption from the token bucket is unbounded in speed which allows for bursts bound in size by the amount of tokens available. Once the token bucket is empty, consumption speed is bound by the refill_rate.
    required:
    - refill_time
    - size
    properties:
      one_time_burst:
        type: integer
        format: int64
        description: The initial size of a token bucket.
        minimum: 0
      refill_time:
        type: integer
        format: int64
        description: The amount of milliseconds it takes for the bucket to refill.
        minimum: 0
      size:
        type: integer
        format: int64
        description: The total number of tokens this bucket can hold.
        minimum: 0
  Drive:
    type: object
    required:
    - drive_id
    - is_root_device
    properties:
      drive_id:
        type: string
      partuuid:
        type: string
        description: Represents the unique id of the boot partition of this device. It is optional and it will be taken into account only if the is_root_device field is true.
      is_root_device:
        type: boolean
      cache_type:
        type: string
        description: Represents the caching strategy for the block device.
        enum:
        - Unsafe
        - Writeback
        default: Unsafe
      is_read_only:
        type: boolean
        description: Is block read only. This field is required for virtio-block config and should be omitted for vhost-user-block configuration.
      path_on_host:
        type: string
        description: Host level path for the guest drive. This field is required for virtio-block config and should be omitted for vhost-user-block configuration.
      rate_limiter:
        $ref: '#/definitions/RateLimiter'
      io_engine:
        type: string
        description: Type of the IO engine used by the device. "Async" is supported on host kernels newer than 5.10.51. This field is optional for virtio-block config and should be omitted for vhost-user-block configuration.
        enum:
        - Sync
        - Async
        default: Sync
      socket:
        type: string
        description: Path to the socket of vhost-user-block backend. This field is required for vhost-user-block config should be omitted for virtio-block configuration.
  Error:
    type: object
    properties:
      fault_message:
        type: string
        description: A description of the error condition
        readOnly: true