CloudOps Orchestration Service:ACS-ECS-RemoveFromSLBWhenPreemptibleInstanceInterrupted

Template name

ACS-ECS-RemoveFromSLBWhenPreemptibleInstanceInterrupted

Execute Now

Template description

Removes a preemptible instance to be released from the backend server list of a Server Load Balancer (SLB) instance.

Template type

Automated

Owner

Alibaba Cloud

Input parameters

Output parameters

Permission policy that is required to execute the template

{
    "Version": "1",
    "Statement": [
        {
            "Action": [
                "slb:DescribeLoadBalancers",
                "slb:RemoveBackendServers",
                "slb:SetBackendServers"
            ],
            "Resource": "*",
            "Effect": "Allow"
        }
    ]
}

References

For more information, see ACS-ECS-RemoveFromSLBWhenPreemptibleInstanceInterrupted.yml at GitHub.

Template content

FormatVersion: OOS-2019-06-01
Description:
  en: Remove backend servers from SLB when preemptible instance of current region is about to be interrupted
  zh-cn: the description in Chinese
  name-en: ACS-ECS-RemoveFromSLBWhenPreemptibleInstanceInterrupted
  name-zh-cn: the description in Chinese
  categories:
    - event-trigger
Parameters:
  OOSAssumeRole:
    Label:
      en: OOSAssumeRole
      zh-cn: the description in Chinese
    Type: String
    Default: ''
  tags:
    Type: Json
    Label:
      en: Tags
      zh-cn: the description in Chinese
    AssociationProperty: Tags
    Default: []
RamRole: '{{OOSAssumeRole}}'
Tasks:
  - Name: eventTrigger
    Description:
      en: Monitor the preemptible instance interruption event
      zh-cn: the description in Chinese
    Action: 'ACS::EventTrigger'
    Properties:
      Tags: '{{ tags }}'
      Product: ECS
      Name:
        - 'Instance:PreemptibleInstanceInterruption'
      Level:
        - WARN
      Content:
        action: delete
      RegionId:
        - '{{ ACS::RegionId }}'
    Outputs:
      instanceId:
        ValueSelector: .content.instanceId
        Type: String
  - Name: describeSLB
    Description:
      en: Views the SLB id of preemptible instance interrupted
      zh-cn: the description in Chinese
    Action: 'ACS::ExecuteAPI'
    Properties:
      Service: SLB
      API: DescribeLoadBalancers
      Parameters:
        ServerId: '{{ eventTrigger.instanceId }}'
    Outputs:
      loadBalancerId:
        ValueSelector: .LoadBalancers.LoadBalancer[0].LoadBalancerId
        Type: String
  - Name: setBackendServers
    Description:
      en: Set the weight of interrupted instance zero on SLB
      zh-cn: the description in Chinese
    Action: 'ACS::ExecuteAPI'
    Properties:
      Service: SLB
      API: SetBackendServers
      Parameters:
        BackendServers:
          - ServerId: '{{ eventTrigger.instanceId }}'
            Weight: 0
        LoadBalancerId: '{{describeSLB.loadBalancerId}}'
  - Name: waitConnectionExpire
    Description:
      en: Wait created connection expire
      zh-cn: the description in Chinese
    Action: 'ACS::Sleep'
    Properties:
      Duration: 'PT1M'
  - Name: removeBackendServers
    Description:
      en: Remove the interrupted instance from SLB backend servers list
      zh-cn: the description in Chinese
    Action: 'ACS::ExecuteAPI'
    Properties:
      Service: SLB
      API: RemoveBackendServers
      Parameters:
        BackendServers:
          - ServerId: '{{ eventTrigger.instanceId }}'
            Weight: 0
        LoadBalancerId: '{{describeSLB.loadBalancerId}}'
Outputs:
  instanceId:
    Value: '{{ eventTrigger.instanceId }}'
    Type: String
Metadata:
  ALIYUN::OOS::Interface:
    ParameterGroups:
      - Parameters:
          - tags
        Label:
          default:
            zh-cn: the description in Chinese
            en: Select Tags
      - Parameters:
          - OOSAssumeRole
        Label:
          default:
            zh-cn: the description in Chinese
            en: Control Options