Amazon EC2 Auto Scaling Provision Auto Scaling Group

arazzo: 1.0.1
info:
  title: Amazon EC2 Auto Scaling Provision Auto Scaling Group
  summary: Create a launch configuration, build an Auto Scaling group from it, and confirm the group exists.
  description: >-
    The foundational provisioning flow for Amazon EC2 Auto Scaling. It first
    creates a reusable launch configuration that describes the AMI, instance
    type, and key pair, then creates an Auto Scaling group that references that
    launch configuration with the desired minimum, maximum, and desired
    capacity, and finally describes the new group to confirm it was created and
    capture its ARN. Every step spells out the AWS query-protocol Action and
    Version inline so the flow can be read and executed without opening the
    underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: autoScalingApi
  url: ../openapi/amazon-ec2-auto-scaling-openapi.yaml
  type: openapi
workflows:
- workflowId: provision-auto-scaling-group
  summary: Create a launch configuration and an Auto Scaling group, then verify the group.
  description: >-
    Creates a launch configuration, creates an Auto Scaling group that uses it,
    and describes the resulting group to confirm creation succeeded.
  inputs:
    type: object
    required:
    - launchConfigurationName
    - imageId
    - instanceType
    - autoScalingGroupName
    - minSize
    - maxSize
    properties:
      launchConfigurationName:
        type: string
        description: The name of the launch configuration to create (unique per Region per account).
      imageId:
        type: string
        description: The ID of the Amazon Machine Image (AMI) the instances are launched from.
      instanceType:
        type: string
        description: The EC2 instance type for launched instances (e.g. t3.micro).
      keyName:
        type: string
        description: The name of the EC2 key pair to assign to launched instances.
      autoScalingGroupName:
        type: string
        description: The name of the Auto Scaling group to create.
      minSize:
        type: integer
        description: The minimum size of the Auto Scaling group.
      maxSize:
        type: integer
        description: The maximum size of the Auto Scaling group.
      desiredCapacity:
        type: integer
        description: The initial desired capacity of the Auto Scaling group.
      availabilityZones:
        type: array
        description: The Availability Zones where instances in the group can be created.
        items:
          type: string
  steps:
  - stepId: createLaunchConfiguration
    description: >-
      Create the launch configuration that the Auto Scaling group will use to
      launch instances.
    operationId: POST_CreateLaunchConfiguration
    parameters:
    - name: Action
      in: query
      value: CreateLaunchConfiguration
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        LaunchConfigurationName: $inputs.launchConfigurationName
        ImageId: $inputs.imageId
        InstanceType: $inputs.instanceType
        KeyName: $inputs.keyName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      createStatus: $statusCode
  - stepId: createAutoScalingGroup
    description: >-
      Create the Auto Scaling group referencing the launch configuration, with
      the requested sizing.
    operationId: POST_CreateAutoScalingGroup
    parameters:
    - name: Action
      in: query
      value: CreateAutoScalingGroup
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        AutoScalingGroupName: $inputs.autoScalingGroupName
        LaunchConfigurationName: $inputs.launchConfigurationName
        MinSize: $inputs.minSize
        MaxSize: $inputs.maxSize
        DesiredCapacity: $inputs.desiredCapacity
        AvailabilityZones: $inputs.availabilityZones
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      createGroupStatus: $statusCode
  - stepId: describeAutoScalingGroup
    description: >-
      Describe the newly created Auto Scaling group to confirm it exists and to
      capture its ARN and current desired capacity.
    operationId: POST_DescribeAutoScalingGroups
    parameters:
    - name: Action
      in: query
      value: DescribeAutoScalingGroups
    - name: Version
      in: query
      value: 2011-01-01
    requestBody:
      contentType: text/xml
      payload:
        AutoScalingGroupNames:
        - $inputs.autoScalingGroupName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      autoScalingGroupArn: $response.body#/AutoScalingGroups/0/AutoScalingGroupARN
      autoScalingGroupName: $response.body#/AutoScalingGroups/0/AutoScalingGroupName
      desiredCapacity: $response.body#/AutoScalingGroups/0/DesiredCapacity
  outputs:
    autoScalingGroupArn: $steps.describeAutoScalingGroup.outputs.autoScalingGroupArn
    desiredCapacity: $steps.describeAutoScalingGroup.outputs.desiredCapacity