arazzo: 1.0.1
info:
  title: Amazon EC2 Create a Launch Template and Boot From It
  summary: Create a launch template, confirm it, then launch an instance referencing the template parameters.
  description: >-
    Establishes a reusable launch configuration and immediately boots from it.
    The workflow creates a launch template, confirms it via
    DescribeLaunchTemplates, and then launches an instance using the same image
    and instance type captured in the template. 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: create-launch-template-and-boot
  summary: Create a launch template, verify it, and launch an instance from it.
  description: >-
    Chains CreateLaunchTemplate, DescribeLaunchTemplates, and RunInstances so a
    reusable launch configuration is created, confirmed, and exercised in one
    run.
  inputs:
    type: object
    required:
    - launchTemplateName
    - imageId
    - instanceType
    properties:
      launchTemplateName:
        type: string
        description: A name for the new launch template.
      versionDescription:
        type: string
        description: An optional description for the first template version.
      imageId:
        type: string
        description: The AMI ID the launched instance should use.
      instanceType:
        type: string
        description: The EC2 instance type to launch.
  steps:
  - stepId: createTemplate
    description: Create the launch template that captures the launch parameters.
    operationId: createLaunchTemplate
    parameters:
    - name: Action
      in: query
      value: CreateLaunchTemplate
    - name: Version
      in: query
      value: '2016-11-15'
    - name: LaunchTemplateName
      in: query
      value: $inputs.launchTemplateName
    - name: VersionDescription
      in: query
      value: $inputs.versionDescription
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      createStatus: $statusCode
  - stepId: confirmTemplate
    description: Confirm the launch template exists before launching from it.
    operationId: describeLaunchTemplates
    parameters:
    - name: Action
      in: query
      value: DescribeLaunchTemplates
    - name: Version
      in: query
      value: '2016-11-15'
    - name: LaunchTemplateName
      in: query
      value: $inputs.launchTemplateName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      confirmStatus: $statusCode
  - stepId: launchFromTemplate
    description: Launch an instance using the template's image and instance type.
    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
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      instanceId: $response.body#/instances/0/instanceId
  outputs:
    instanceId: $steps.launchFromTemplate.outputs.instanceId