CloudWatchAutoAlarms-S3.yaml

---
Description: S3 Bucket for Cross-Account deployment of amazon-cloudwatch-auto-alarms Lambda function
AWSTemplateFormatVersion: '2010-09-09'
Parameters:
  OrganizationID:
    Description: Provide read access to all accounts in the organization.  Leave blank for single account S3 bucket permissions.
    Type: String
    Default: ""
Conditions:
  OrgEnabledAccess: !Not [!Equals ["", !Ref OrganizationID]]

Resources:
  LambdaDeploymentBucket:
    Type: "AWS::S3::Bucket"
    Properties:
#      BucketEncryption:
#        ServerSideEncryptionConfiguration:
#          - ServerSideEncryptionByDefault:
#              SSEAlgorithm: aws:kms
#              KMSMasterKeyID:
#                Fn::ImportValue: <S3 CMK KMS Encryption Key>
      VersioningConfiguration:
        Status: Enabled
      #      LoggingConfiguration:
      #        DestinationBucketName:
      #          Fn::ImportValue: !Sub <Destination Log Bucket>
      #        LogFilePrefix: <Logfile Prefix>
      LifecycleConfiguration:
        Rules:
          - Id: DeleteRule
            Status: Enabled
            ExpirationInDays: '90'

  LambdaDeploymentBucketPolicy:
    Type: "AWS::S3::BucketPolicy"
    Properties:
      Bucket: !Ref LambdaDeploymentBucket
      PolicyDocument:
        Version: '2012-10-17'
        Id: SSEAndSSLPolicy
        Statement:
          - Sid: DenyInsecureConnections
            Effect: Deny
            Principal: "*"
            Action: s3:*
            Resource:
              - !Join
                - ''
                - - Fn::GetAtt: [LambdaDeploymentBucket, Arn]
                  - '/*'
            Condition:
              Bool:
                aws:SecureTransport: 'false'
          - Sid: DenyS3PublicObjectACL
            Effect: Deny
            Principal: "*"
            Action: s3:PutObjectAcl
            Resource:
              - !Join
                - ''
                - - Fn::GetAtt: [LambdaDeploymentBucket, Arn]
                  - '/*'
            Condition:
              StringEqualsIgnoreCaseIfExists:
                s3:x-amz-acl:
                  - public-read
                  - public-read-write
                  - authenticated-read
          - !If
            - OrgEnabledAccess
            - Sid: ''
              Effect: Allow
              Principal: "*"
              Action:
                - s3:ListBucket
              Resource: !GetAtt LambdaDeploymentBucket.Arn
              Condition:
                ForAnyValue:StringLike:
                  aws:PrincipalOrgPaths:
                    - !Sub "${OrganizationID}/*"
            - !Ref 'AWS::NoValue'

          - !If
            - OrgEnabledAccess
            - Sid: ''
              Effect: Allow
              Principal: "*"
              Action:
                - s3:Get*
              Resource:
                - !Join
                  - ''
                  - - Fn::GetAtt: [LambdaDeploymentBucket, Arn]
                    - '/*'
              Condition:
                ForAnyValue:StringLike:
                  aws:PrincipalOrgPaths:
                    - !Sub "${OrganizationID}/*"
            - !Ref 'AWS::NoValue'
Outputs:
  LambdaDeploymentBucketName:
    Value: !Ref LambdaDeploymentBucket
    Description: "Lambda S3 deployment bucket name for deployment support of amazon-cloudwatch-auto-alarms lambda function"
    Export:
      Name: !Sub "amazon-cloudwatch-auto-alarms-bucket-name"