AWS FIS Run Experiment to Completion

arazzo: 1.0.1
info:
  title: AWS FIS Run Experiment to Completion
  summary: Create an experiment template, start an experiment from it, and poll until the experiment reaches a terminal state.
  description: >-
    The canonical AWS Fault Injection Simulator chaos engineering flow. The
    workflow creates an experiment template that defines targets, actions, and
    stop conditions, starts a fault injection experiment from that template, and
    then polls the experiment until it settles into a terminal state. A poll loop
    re-reads the experiment and branches on its state status, looping back while
    the experiment is still pending, initiating, or running, and ending once it
    completes, stops, or fails. Every step spells out its request inline so the
    flow can be read and executed without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: fisApi
  url: ../openapi/amazon-fis-openapi.yml
  type: openapi
workflows:
- workflowId: run-experiment-to-completion
  summary: Create a template, start an experiment, and poll until it reaches a terminal state.
  description: >-
    Creates an experiment template, starts an experiment from the returned
    template id, then polls getExperiment, looping while the experiment is
    pending, initiating, or running and ending when it is completed, stopped, or
    failed.
  inputs:
    type: object
    required:
    - description
    - stopConditions
    - targets
    - actions
    properties:
      clientToken:
        type: string
        description: Idempotency token for the create and start requests.
      description:
        type: string
        description: Human readable description for the experiment template.
      stopConditions:
        type: array
        description: Stop conditions that halt the experiment (e.g. a CloudWatch alarm).
        items:
          type: object
      targets:
        type: object
        description: Map of named targets defining resource type, tags, and selection mode.
      actions:
        type: object
        description: Map of named actions referencing an actionId and the targets it applies to.
      roleArn:
        type: string
        description: IAM role ARN that FIS assumes to run the experiment.
      tags:
        type: object
        description: Tags to apply to the experiment template and started experiment.
  steps:
  - stepId: createTemplate
    description: >-
      Create an experiment template defining the targets, actions, and stop
      conditions for the fault injection experiment.
    operationId: createExperimentTemplate
    requestBody:
      contentType: application/json
      payload:
        clientToken: $inputs.clientToken
        description: $inputs.description
        stopConditions: $inputs.stopConditions
        targets: $inputs.targets
        actions: $inputs.actions
        roleArn: $inputs.roleArn
        tags: $inputs.tags
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      experimentTemplateId: $response.body#/experimentTemplate/id
  - stepId: startExperiment
    description: >-
      Start a fault injection experiment from the newly created experiment
      template.
    operationId: startExperiment
    requestBody:
      contentType: application/json
      payload:
        clientToken: $inputs.clientToken
        experimentTemplateId: $steps.createTemplate.outputs.experimentTemplateId
        tags: $inputs.tags
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      experimentId: $response.body#/experiment/id
      initialStatus: $response.body#/experiment/state/status
  - stepId: pollExperiment
    description: >-
      Read the current state of the running experiment. Branches back to itself
      while the experiment is still pending, initiating, or running, and ends
      when the experiment reaches a terminal state (completed, stopped, or
      failed).
    operationId: getExperiment
    parameters:
    - name: id
      in: path
      value: $steps.startExperiment.outputs.experimentId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/experiment/state/status
      reason: $response.body#/experiment/state/reason
    onSuccess:
    - name: stillRunning
      type: goto
      stepId: pollExperiment
      criteria:
      - context: $response.body
        condition: $.experiment.state.status == 'pending' || $.experiment.state.status == 'initiating' || $.experiment.state.status == 'running'
        type: jsonpath
    - name: terminal
      type: end
      criteria:
      - context: $response.body
        condition: $.experiment.state.status == 'completed' || $.experiment.state.status == 'stopped' || $.experiment.state.status == 'failed'
        type: jsonpath
  outputs:
    experimentTemplateId: $steps.createTemplate.outputs.experimentTemplateId
    experimentId: $steps.startExperiment.outputs.experimentId
    finalStatus: $steps.pollExperiment.outputs.status
    finalReason: $steps.pollExperiment.outputs.reason