resources_circular_dependency.yaml

---
AWSTemplateFormatVersion: "2010-09-09"
Parameters:
  myVpcId:
    Description: MyVpc Id
    Type: AWS::EC2::VPC::Id
  myBucketName:
    Type: String
    Description: "Name of the S3 bucket."
  KeyAdminRole:
    Type: String
    Description: "Name of the role that will act as Key Administrator for the KMS CMK created in this stack."
  Ec2ImageId:
    Type: AWS::EC2::Image::Id
    Description: "ImageId to use when launching the Linux EC2 instance"
  Ec2SubnetId:
    Type: AWS::EC2::Subnet::Id
    Description: "Subnet to associate myInstance EC2 Instance with."
  Ec2SecurityGroupId:
    Type: AWS::EC2::SecurityGroup::Id
    Description: "Existing Security Group that allows SSH access from your machine."
Resources:
  mySecurityGroupVpc1:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: "Security Group Vpc 1"
      VpcId: !Ref myVpcId
      SecurityGroupIngress:
        - IpProtocol: 1
          SourceSecurityGroupId: "sg-1234567"
        - IpProtocol: 1
          SourceSecurityGroupId: !Sub "${mySecurityGroupVpc2.GroupId}"
  mySecurityGroupVpc2:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: "Security Group Vpc 2"
      VpcId: !Ref myVpcId
      SecurityGroupIngress:
        - IpProtocol: 1
          SourceSecurityGroupId: !GetAtt mySecurityGroupVpc1.GroupId
  mySecurityGroupVpc3:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: "Security Group Vpc 3"
      VpcId: !Ref myVpcId
      SecurityGroupIngress:
        - IpProtocol: 1
          SourceSecurityGroupId: !Ref mySecurityGroupVpc3
  myInstance:
    Type: AWS::EC2::Instance
    DependsOn: myInstanceProfile
    Properties:
      IamInstanceProfile: !Ref myInstanceProfile
      ImageId: !Ref Ec2ImageId
      InstanceType: t2.micro
      NetworkInterfaces:
        - AssociatePublicIpAddress: true
          GroupSet:
            - !Ref Ec2SecurityGroupId
          SubnetId: !Ref Ec2SubnetId
          DeviceIndex: 0
  myBucket:
    Type: AWS::S3::Bucket
    DependsOn: myKms
    Properties:
      BucketEncryption:
        ServerSideEncryptionConfiguration:
          - ServerSideEncryptionByDefault:
              KMSMasterKeyID: !Ref myKms
              SSEAlgorithm: aws:kms
      BucketName: !Ref myBucketName
  myBucketPolicy:
    Type: AWS::S3::BucketPolicy
    Properties:
      Bucket: !Ref myBucket
      PolicyDocument:
        Version: "2012-10-17"
        Id: PutObjPolicy
        Statement:
          - Sid: DenyIncorrectEncryptionHeader
            Effect: Deny
            Principal: "*"
            Action: s3:PutObject
            Resource: !Sub arn:aws:s3:::${myBucketName}/*
            Condition:
              StringNotEquals:
                s3:x-amz-server-side-encryption: aws:kms
          - Sid: DenyUnEncryptedObjectUploads
            Effect: Deny
            Principal: "*"
            Action: s3:PutObject
            Resource: !Sub arn:aws:s3:::${myBucketName}/*
            Condition:
              "Null":
                s3:x-amz-server-side-encryption: true
  myRoleToWriteToS3:
    Type: AWS::IAM::Role
    DependsOn: myKms
    Properties:
      RoleName: WriteToS3
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Principal:
              Service:
                - "ec2.amazonaws.com"
            Action:
              - "sts:AssumeRole"
      Path: "/"
      Policies:
        - PolicyName: !Sub AllowWriteTo${myBucketName}
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Sid: AllowPutObjectOnlyWithmyKms
                Effect: Allow
                Action: s3:PutObject
                Resource: arn:aws:s3:::*/*
                Condition:
                  StringEquals:
                    s3:x-amz-server-side-encryption: aws:kms
                    s3:x-amz-server-side-encryption-aws-kms-key-id: !Ref myKms
              - Sid: AllowWriteToBucket
                Effect: Allow
                Action:
                  - s3:GetObjectAcl
                  - s3:GetObject
                  - s3:AbortMultipartUpload
                  - s3:PutObjectVersionTagging
                  - s3:ListBucket
                  - s3:PutObjectTagging
                  - s3:GetBucketAcl
                  - s3:GetObjectVersion
                Resource:
                  - arn:aws:s3:::testbucket
                  - arn:aws:s3:::*/*
              - Sid: AllowListBuckets
                Effect: Allow
                Action:
                  - s3:ListAllMyBuckets
                  - s3:HeadBucket
                  - s3:ListObjects
                Resource: "*"
  myInstanceProfile:
    Type: AWS::IAM::InstanceProfile
    DependsOn: myRoleToWriteToS3
    Properties:
      InstanceProfileName: InstanceProfile
      Path: "/"
      Roles:
        - !Ref myRoleToWriteToS3
  myKms:
    Type: AWS::KMS::Key
    Properties:
      Description: "Key used to encrypt objects on S3"
      EnableKeyRotation: true
      KeyPolicy:
        Version: "2012-10-17"
        Id: KmsKeyPolicy
        Statement:
          - Sid: Enable IAM User Permissions
            Effect: Allow
            Principal:
              AWS: !Sub arn:aws:iam::${AWS::AccountId}:root
            Action: kms:*
            Resource: "*"
          - Sid: Allow access for Key Administrators
            Effect: Allow
            Principal:
              AWS: !Sub arn:aws:iam::${AWS::AccountId}:role/${KeyAdminRole}
            Action:
              - kms:Create*
              - kms:Describe*
              - kms:Enable*
              - kms:List*
              - kms:Put*
              - kms:Update*
              - kms:Revoke*
              - kms:Disable*
              - kms:Get*
              - kms:Delete*
              - kms:TagResource
              - kms:UntagResource
              - kms:ScheduleKeyDeletion
              - kms:CancelKeyDeletion
            Resource: "*"
          - Sid: Allow use of the key
            Effect: Allow
            Principal:
              AWS:
                - !Sub arn:aws:iam::${AWS::AccountId}:role/${KeyAdminRole}
                - !Sub arn:aws:iam::${AWS::AccountId}:instanceprofile/${myInstanceProfile}
            Action:
              - kms:Encrypt
              - kms:Decrypt
              - kms:ReEncrypt*
              - kms:GenerateDataKey*
              - kms:DescribeKey
            Resource: "*"
          - Sid: Allow attachment of persistent resources
            Effect: Allow
            Principal:
              AWS: !Sub arn:aws:iam::${AWS::AccountId}:role/${KeyAdminRole}
            Action:
              - kms:CreateGrant
              - kms:ListGrants
              - kms:RevokeGrant
            Resource: "*"
            Condition:
              Bool:
                kms:GrantIsForAWSResource: "True"
  myInstanceSub:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: String
      UserData:
        Fn::Sub:
          Test: bad configuration
  taskdefinition:
    Type: AWS::ECS::TaskDefinition
    Properties:
      RequiresCompatibilities:
        - "EC2"
        - "FARGATE"
      ContainerDefinitions:
        - Name: "my-app"
          MountPoints:
            - SourceVolume: "my-vol"
              ContainerPath: "/var/www/my-vol"
          Image: "amazon/amazon-ecs-sample"
          Cpu: 10
          EntryPoint:
            - "/usr/sbin/apache2"
            - "-D"
            - "FOREGROUND"
          Memory: 500
          Essential: true
          Environment:
            - Name: key
              Value: value
        - Name: "busybox"
          Image: "busybox"
          Cpu: 10
          EntryPoint:
            - "sh"
            - "-c"
          Memory: 500
          Command:
            - '/bin/sh -c "while true; do /bin/date > /var/www/my-vol/date; sleep 1; done"'
          Essential: false
          # Don't break the graph code by picking up a DependsOn
          DependsOn:
            - ContainerName: my-app
              Condition: START
          VolumesFrom:
            - SourceContainer: "my-app"
      Volumes:
        - Host:
            SourcePath: "/var/lib/docker/vfs/dir/"
          Name: "my-vol"