Systems Manager Automation 작업 참조

이 참조는 Automation 실행서에서 지정할 수 있는 Automation 작업을 설명합니다. Automation은 AWS Systems Manager의 기능입니다. 이러한 작업은 다른 유형의 Systems Manager(SSM) 문서에는 사용할 수 없습니다. 다른 유형의 SSM 문서용 플러그인에 대한 자세한 내용은 Command 문서 플러그인 참조 섹션을 참조하세요.

Systems Manager Automation은 Automation 실행서에 정의된 단계를 실행합니다. 각 단계는 특정 작업과 관련되어 있습니다. 작업은 해당 단계의 입력, 동작 및 출력을 결정합니다. 단계는 실행서의 mainSteps 섹션에 정의됩니다.

작업 또는 단계의 출력은 지정할 필요가 없습니다. 출력은 단계와 관련된 작업에 의해 미리 결정되어 있습니다. 실행서에 단계 입력을 지정할 때 이전 단계로부터 하나 이상의 출력을 참조할 수 있습니다. 예를 들어 후속 aws:runCommand 작업에 aws:runInstances 출력을 사용 가능하게 할 수 있습니다. 또한 실행서의 Output 섹션에서 이전 단계의 출력을 참조할 수도 있습니다.

모든 작업에서 공유하는 속성

공통 속성은 모든 작업에서 발견되는 파라미터 또는 옵션입니다. 일부 옵션은 단계가 완료될 때까지 기다리는 시간, 단계가 실패할 경우 수행할 작업 등과 같은 단계에 대한 동작을 정의합니다. 다음은 모든 작업에 공통적인 속성입니다.

예

---
description: "Custom Automation Example"
schemaVersion: '0.3'
assumeRole: "{{ AutomationAssumeRole }}"
parameters:
  AutomationAssumeRole:
    type: String
    description: "(Required) The ARN of the role that allows Automation to perform
      the actions on your behalf. If no role is specified, Systems Manager Automation
      uses your IAM permissions to run this runbook."
    default: ''
  InstanceId:
      type: String
      description: "(Required) The Instance Id whose root EBS volume you want to restore the latest Snapshot."
      default: ''
mainSteps:
- name: getInstanceDetails
  action: aws:executeAwsApi
  onFailure: Abort
  inputs:
    Service: ec2
    Api: DescribeInstances
    InstanceIds:
    - "{{ InstanceId }}"
  outputs:
    - Name: availabilityZone
      Selector: "$.Reservations[0].Instances[0].Placement.AvailabilityZone"
      Type: String
    - Name: rootDeviceName
      Selector: "$.Reservations[0].Instances[0].RootDeviceName"
      Type: String
  nextStep: getRootVolumeId
- name: getRootVolumeId
  action: aws:executeAwsApi
  maxAttempts: 3
  onFailure: Abort
  inputs:
    Service: ec2
    Api: DescribeVolumes
    Filters:
    -  Name: attachment.device
       Values: ["{{ getInstanceDetails.rootDeviceName }}"]
    -  Name: attachment.instance-id
       Values: ["{{ InstanceId }}"]
  outputs:
    - Name: rootVolumeId
      Selector: "$.Volumes[0].VolumeId"
      Type: String
  nextStep: getSnapshotsByStartTime
- name: getSnapshotsByStartTime
  action: aws:executeScript
  timeoutSeconds: 45
  onFailure: Abort
  inputs:
    Runtime: python3.8
    Handler: getSnapshotsByStartTime
    InputPayload:
      rootVolumeId : "{{ getRootVolumeId.rootVolumeId }}"
    Script: |-
      def getSnapshotsByStartTime(events,context):
        import boto3

        #Initialize client
        ec2 = boto3.client('ec2')
        rootVolumeId = events['rootVolumeId']
        snapshotsQuery = ec2.describe_snapshots(
          Filters=[
            {
              "Name": "volume-id",
              "Values": [rootVolumeId]
            }
          ]
        )
        if not snapshotsQuery['Snapshots']:
          noSnapshotFoundString = "NoSnapshotFound"
          return { 'noSnapshotFound' : noSnapshotFoundString }
        else:
          jsonSnapshots = snapshotsQuery['Snapshots']
          sortedSnapshots = sorted(jsonSnapshots, key=lambda k: k['StartTime'], reverse=True)
          latestSortedSnapshotId = sortedSnapshots[0]['SnapshotId']
          return { 'latestSnapshotId' : latestSortedSnapshotId }
  outputs:
  - Name: Payload
    Selector: $.Payload
    Type: StringMap
  - Name: latestSnapshotId
    Selector: $.Payload.latestSnapshotId
    Type: String
  - Name: noSnapshotFound
    Selector: $.Payload.noSnapshotFound
    Type: String 
  nextStep: branchFromResults
- name: branchFromResults
  action: aws:branch
  onFailure: Abort
  onCancel: step:startInstance
  inputs:
    Choices:
    - NextStep: createNewRootVolumeFromSnapshot
      Not:
        Variable: "{{ getSnapshotsByStartTime.noSnapshotFound }}"
        StringEquals: "NoSnapshotFound"
  isEnd: true
- name: createNewRootVolumeFromSnapshot
  action: aws:executeAwsApi
  onFailure: Abort
  inputs:
    Service: ec2
    Api: CreateVolume
    AvailabilityZone: "{{ getInstanceDetails.availabilityZone }}"
    SnapshotId: "{{ getSnapshotsByStartTime.latestSnapshotId }}"
  outputs:
    - Name: newRootVolumeId
      Selector: "$.VolumeId"
      Type: String
  nextStep: stopInstance
- name: stopInstance
  action: aws:executeAwsApi
  onFailure: Abort
  inputs:
    Service: ec2
    Api: StopInstances
    InstanceIds:
    - "{{ InstanceId }}"
  nextStep: verifyVolumeAvailability
- name: verifyVolumeAvailability
  action: aws:waitForAwsResourceProperty
  timeoutSeconds: 120
  inputs:
    Service: ec2
    Api: DescribeVolumes
    VolumeIds:
    - "{{ createNewRootVolumeFromSnapshot.newRootVolumeId }}"
    PropertySelector: "$.Volumes[0].State"
    DesiredValues:
    - "available"
  nextStep: verifyInstanceStopped
- name: verifyInstanceStopped
  action: aws:waitForAwsResourceProperty
  timeoutSeconds: 120
  inputs:
    Service: ec2
    Api: DescribeInstances
    InstanceIds:
    - "{{ InstanceId }}"
    PropertySelector: "$.Reservations[0].Instances[0].State.Name"
    DesiredValues:
    - "stopped"
  nextStep: detachRootVolume
- name: detachRootVolume
  action: aws:executeAwsApi
  onFailure: Abort
  isCritical: true
  inputs:
    Service: ec2
    Api: DetachVolume
    VolumeId: "{{ getRootVolumeId.rootVolumeId }}"
  nextStep: verifyRootVolumeDetached
- name: verifyRootVolumeDetached
  action: aws:waitForAwsResourceProperty
  timeoutSeconds: 30
  inputs:
    Service: ec2
    Api: DescribeVolumes
    VolumeIds:
    - "{{ getRootVolumeId.rootVolumeId }}"
    PropertySelector: "$.Volumes[0].State"
    DesiredValues:
    - "available"
  nextStep: attachNewRootVolume
- name: attachNewRootVolume
  action: aws:executeAwsApi
  onFailure: Abort
  inputs:
    Service: ec2
    Api: AttachVolume
    Device: "{{ getInstanceDetails.rootDeviceName }}"
    InstanceId: "{{ InstanceId }}"
    VolumeId: "{{ createNewRootVolumeFromSnapshot.newRootVolumeId }}"
  nextStep: verifyNewRootVolumeAttached
- name: verifyNewRootVolumeAttached
  action: aws:waitForAwsResourceProperty
  timeoutSeconds: 30
  inputs:
    Service: ec2
    Api: DescribeVolumes
    VolumeIds:
    - "{{ createNewRootVolumeFromSnapshot.newRootVolumeId }}"
    PropertySelector: "$.Volumes[0].Attachments[0].State"
    DesiredValues:
    - "attached"
  nextStep: startInstance
- name: startInstance
  action: aws:executeAwsApi
  onFailure: Abort
  inputs:
    Service: ec2
    Api: StartInstances
    InstanceIds:
    - "{{ InstanceId }}"