spot-instance-interrupt-notify-cfn-stack-sample.yaml

AWSTemplateFormatVersion: "2010-09-09"
Description: SNS Topic and EventBridge for SpotInstance Intteruption Notify

Parameters:
  Env:
    Type: String
    Default: dev
    AllowedValues:
      - dev
      - stg
      - prd
  SlackChannelId:
    Type: String
    Description: Slack Channel Id
  SlackWorkSpaceId:
    Type: String
    Description: Slack WorkSpace Id

Resources:
  # ----------------------------------------------------------------
  # Define of IAM
  # ----------------------------------------------------------------
  SpotInstanceInterruptSlackNotifyIAMRole:
    Type: AWS::IAM::Role
    Properties:
      #RoleName: !Sub ${AWS::StackName}-iam-role
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: chatbot.amazonaws.com
            Action: sts:AssumeRole
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/CloudWatchReadOnlyAccess

  # ----------------------------------------------------------------
  # Define of EventBridge
  # ----------------------------------------------------------------
  SpotInstanceInterruptEventRule:
    Type: AWS::Events::Rule
    DependsOn:
      - SpotInstanceInterruptSlackNotifySNSTopic
      - SpotInstanceInterruptSlackNotifySNSTopicPolicy
    Properties:
      Description: "EventRule"
      EventPattern:
        source:
          - "aws.ec2"
        detail-type:
          - "EC2 Spot Instance Interruption Warning"
      State: "ENABLED"
      Targets:
        -
          Arn:
            Ref: "SpotInstanceInterruptSlackNotifySNSTopic"
          Id: "SpotInstanceInterruptSlackNotifySNSTopic"

  # ----------------------------------------------------------------
  # Define of SNS
  # ----------------------------------------------------------------
  SpotInstanceInterruptSlackNotifySNSTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: !Sub ${AWS::StackName}-sns-topic

  SpotInstanceInterruptSlackNotifySNSTopicPolicy:
    Type: AWS::SNS::TopicPolicy
    Properties:
      PolicyDocument:
        Statement:
          - Effect: Allow
            Principal:
              Service: events.amazonaws.com
            Action: sns:Publish
            Resource: '*'
      Topics:
        - !Ref SpotInstanceInterruptSlackNotifySNSTopic

  # ----------------------------------------------------------------
  # Define of Chatbot Slack Channel
  # ----------------------------------------------------------------
  SpotInstanceInterruptSlackNotifySlackChannelConfiguration:
    Type: AWS::Chatbot::SlackChannelConfiguration
    DependsOn:
      - SpotInstanceInterruptSlackNotifySNSTopic
      - SpotInstanceInterruptSlackNotifySNSTopicPolicy
    Properties:
      ConfigurationName: !Sub ${AWS::StackName}-chatbot
      IamRoleArn: !GetAtt SpotInstanceInterruptSlackNotifyIAMRole.Arn
      LoggingLevel: ERROR
      SlackChannelId: !Ref SlackChannelId
      SlackWorkspaceId: !Ref SlackWorkspaceId
      SnsTopicArns:
        - !Ref SpotInstanceInterruptSlackNotifySNSTopic