Amazon EC2 Prepare Key and Launch

arazzo: 1.0.1
info:
  title: Amazon EC2 Prepare Key and Launch
  summary: Create a key pair, confirm it via describe, then launch an instance using it.
  description: >-
    Ensures an SSH key pair is in place before launching. The workflow creates a
    key pair, confirms it via DescribeKeyPairs, and launches an instance bound to
    that key pair so the instance is reachable from first boot. Every step spells
    out its request inline using the Amazon EC2 query protocol (Action and
    Version parameters) so the flow can be read and executed without opening the
    underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: amazonEc2Api
  url: ../openapi/amazon-ec2-openapi.yml
  type: openapi
workflows:
- workflowId: prepare-key-and-launch
  summary: Create and confirm a key pair, then launch an instance using it.
  description: >-
    Chains CreateKeyPair, DescribeKeyPairs, and RunInstances so an instance is
    launched with a confirmed, freshly created SSH key pair.
  inputs:
    type: object
    required:
    - keyName
    - imageId
    - instanceType
    properties:
      keyName:
        type: string
        description: A unique name for the new key pair.
      imageId:
        type: string
        description: The AMI ID to launch the instance from.
      instanceType:
        type: string
        description: The EC2 instance type to launch.
  steps:
  - stepId: createKey
    description: Create the SSH key pair for instance access.
    operationId: createKeyPair
    parameters:
    - name: Action
      in: query
      value: CreateKeyPair
    - name: Version
      in: query
      value: '2016-11-15'
    - name: KeyName
      in: query
      value: $inputs.keyName
    - name: KeyType
      in: query
      value: rsa
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      createStatus: $statusCode
  - stepId: confirmKey
    description: Confirm the key pair exists before launching with it.
    operationId: describeKeyPairs
    parameters:
    - name: Action
      in: query
      value: DescribeKeyPairs
    - name: Version
      in: query
      value: '2016-11-15'
    - name: KeyName
      in: query
      value: $inputs.keyName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      confirmStatus: $statusCode
  - stepId: launchWithKey
    description: Launch an instance bound to the confirmed key pair.
    operationId: runInstances
    parameters:
    - name: Action
      in: query
      value: RunInstances
    - name: Version
      in: query
      value: '2016-11-15'
    - name: ImageId
      in: query
      value: $inputs.imageId
    - name: InstanceType
      in: query
      value: $inputs.instanceType
    - name: MinCount
      in: query
      value: 1
    - name: MaxCount
      in: query
      value: 1
    - name: KeyName
      in: query
      value: $inputs.keyName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      instanceId: $response.body#/instances/0/instanceId
  outputs:
    instanceId: $steps.launchWithKey.outputs.instanceId