module.yml

---
# Copyright 2018 widdix GmbH
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
AWSTemplateFormatVersion: '2010-09-09'
Description: 'cfn-modules: AWS EC2 instance (Amazon Linux 2)'
# cfn-modules:implements(ExposeId, ExposeSecurityGroupId)
Parameters:
  VpcModule:
    Description: 'Stack name of vpc module.'
    Type: String
  AlertingModule:
    Description: 'Optional but recommended stack name of alerting module.'
    Type: String
    Default: ''
  BastionModule:
    Description: 'Optional but recommended stack name of module implementing Bastion.'
    Type: String
    Default: ''
  HostedZoneModule:
    Description: 'Optional stack name of module implementing HostedZone.'
    Type: String
    Default: ''
  KeyName:
    Description: 'Optional key name of the Linux user ec2-user to establish a SSH connection to the EC2 instance (update requires replacement of root volume = data loss!).'
    Type: String
    Default: ''
  IAMUserSSHAccess:
    Description: 'Synchronize public keys of IAM users to enable personalized SSH access (https://github.com/widdix/aws-ec2-ssh)?'
    Type: String
    Default: false
    AllowedValues: [true, false]
  SystemsManagerAccess:
    Description: 'Enable AWS Systems Manager agent and Session Manager.'
    Type: String
    Default: true
    AllowedValues: [true, false]
  InstanceType:
    Description: 'The instance type for the EC2 instance.'
    Type: String
    Default: 't2.micro'
  Name:
    Description: 'The name for the EC2 instance (auto generated if not set).'
    Type: String
    Default: ''
  AZChar:
    Description: 'Availability zone char (update requires replacement of root volume = data loss!).'
    Type: String
    Default: A
    AllowedValues: [A, B, C]
  SubnetReach:
    Description: 'Subnet reach (update requires replacement of root volume = data loss!).'
    Type: String
    Default: Public
    AllowedValues:
    - Public
    - Private
  LogGroupRetentionInDays:
    Description: 'Specifies the number of days you want to retain log events.'
    Type: Number
    Default: 14
    AllowedValues: [1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, 3653]
  SubDomainNameWithDot:
    Description: 'Name that is used to create the DNS entry with trailing dot, e.g. §{SubDomainNameWithDot}§{HostedZoneName}. Leave blank for naked (or apex and bare) domain. Requires HostedZoneModule parameter!'
    Type: String
    Default: 'test.'
  UserData:
    Description: 'Optional Bash script executed on first instance launch.'
    Type: String
    Default: ''
  IngressTcpPort1:
    Description: 'Optional port allowing ingress TCP traffic.'
    Type: String
    Default: ''
  IngressTcpClientSgModule1:
    Description: 'Optional stack name of client-sg module that is required to access IngressTcpPort1 (if you leave this blank, IngressTcpPort1 is open to the world 0.0.0.0/0).'
    Type: String
    Default: ''
  IngressTcpPort2:
    Description: 'Optional port allowing ingress TCP traffic.'
    Type: String
    Default: ''
  IngressTcpClientSgModule2:
    Description: 'Optional stack name of client-sg module that is required to access IngressTcpPort2 (if you leave this blank, IngressTcpPort2 is open to the world 0.0.0.0/0).'
    Type: String
    Default: ''
  IngressTcpPort3:
    Description: 'Optional port allowing ingress TCP traffic.'
    Type: String
    Default: ''
  IngressTcpClientSgModule3:
    Description: 'Optional stack name of client-sg module that is required to access IngressTcpPort3 (if you leave this blank, IngressTcpPort3 is open to the world 0.0.0.0/0).'
    Type: String
    Default: ''
  ClientSgModule1:
    Description: 'Optional stack name of client-sg module to mark traffic from EC2 instance.'
    Type: String
    Default: ''
  ClientSgModule2:
    Description: 'Optional stack name of client-sg module to mark traffic from EC2 instance.'
    Type: String
    Default: ''
  ClientSgModule3:
    Description: 'Optional stack name of client-sg module to mark traffic from EC2 instance.'
    Type: String
    Default: ''
  FileSystemModule1:
    Description: 'Optional stack name of efs-file-system module mounted to /mnt/efs1/ (update is not supported).'
    Type: String
    Default: ''
  VolumeModule1:
    Description: 'Optional stack name of ebs-volume module mounted to /mnt/volume1/ (update is not supported).'
    Type: String
    Default: ''
  AmazonLinux2Version:
    Description: 'Optional version of Amazon Linux 2 (update requires replacement of root volume = data loss!).'
    Type: String
    Default: '2.0.20241113.1'
    AllowedValues: ['2.0.20241113.1', '2.0.20190508', '2.0.20181114', '2.0.20180622.1']
  ManagedPolicyArns:
    Description: 'Optional comma-delimited list of IAM managed policy ARNs to attach to the instance''s IAM role'
    Type: String
    Default: ''
Mappings:
  VersionMap:
    '2.0.20180622.1':
      Map: RegionMap20201806221
    '2.0.20181114':
      Map: RegionMap2020181114
    '2.0.20190508':
      Map: RegionMap2020190508
    '2.0.20241113.1':
      Map: RegionMap20202411131
  RegionMap20201806221:
    'ap-south-1':
      ImageId: 'ami-d783a9b8'
    'eu-west-3':
      ImageId: 'ami-2cf54551'
    'eu-west-2':
      ImageId: 'ami-b8b45ddf'
    'eu-west-1':
      ImageId: 'ami-466768ac'
    'ap-northeast-2':
      ImageId: 'ami-afd86dc1'
    'ap-northeast-1':
      ImageId: 'ami-e99f4896'
    'sa-east-1':
      ImageId: 'ami-6dca9001'
    'ca-central-1':
      ImageId: 'ami-0ee86a6a'
    'ap-southeast-1':
      ImageId: 'ami-05868579'
    'ap-southeast-2':
      ImageId: 'ami-39f8215b'
    'eu-central-1':
      ImageId: 'ami-7c4f7097'
    'us-east-1':
      ImageId: 'ami-b70554c8'
    'us-east-2':
      ImageId: 'ami-8c122be9'
    'us-west-1':
      ImageId: 'ami-e0ba5c83'
    'us-west-2':
      ImageId: 'ami-a9d09ed1'
  RegionMap2020181114:
    'ap-south-1':
      ImageId: 'ami-06bcd1131b2f55803'
    'eu-west-3':
      ImageId: 'ami-051707cdba246187b'
    'eu-north-1':
      ImageId: 'ami-07ec6279'
    'eu-west-2':
      ImageId: 'ami-0274e11dced17bb5b'
    'eu-west-1':
      ImageId: 'ami-09693313102a30b2c'
    'ap-northeast-2':
      ImageId: 'ami-0b4fdb56a00adb616'
    'ap-northeast-1':
      ImageId: 'ami-0a2de1c3b415889d2'
    'sa-east-1':
      ImageId: 'ami-0112d42866980b373'
    'ca-central-1':
      ImageId: 'ami-076b4adb3f90cd384'
    'ap-southeast-1':
      ImageId: 'ami-0b84d2c53ad5250c2'
    'ap-southeast-2':
      ImageId: 'ami-08589eca6dcc9b39c'
    'eu-central-1':
      ImageId: 'ami-034fffcc6a0063961'
    'us-east-1':
      ImageId: 'ami-009d6802948d06e52'
    'us-east-2':
      ImageId: 'ami-02e680c4540db351e'
    'us-west-1':
      ImageId: 'ami-011b6930a81cd6aaf'
    'us-west-2':
      ImageId: 'ami-01bbe152bf19d0289'
  RegionMap2020190508:
    'eu-north-1':
      ImageId: 'ami-1fb13961'
    'ap-south-1':
      ImageId: 'ami-00e782930f1c3dbc7'
    'eu-west-3':
      ImageId: 'ami-0ebb3a801d5fb8b9b'
    'eu-west-2':
      ImageId: 'ami-0009a33f033d8b7b6'
    'eu-west-1':
      ImageId: 'ami-030dbca661d402413'
    'ap-northeast-2':
      ImageId: 'ami-08ab3f7e72215fe91'
    'ap-northeast-1':
      ImageId: 'ami-00d101850e971728d'
    'sa-east-1':
      ImageId: 'ami-058141e091292ecf0'
    'ca-central-1':
      ImageId: 'ami-08a9b721ecc5b0a53'
    'ap-southeast-1':
      ImageId: 'ami-0b5a47f8865280111'
    'ap-southeast-2':
      ImageId: 'ami-0fb7513bcdc525c3b'
    'eu-central-1':
      ImageId: 'ami-0ebe657bc328d4e82'
    'us-east-1':
      ImageId: 'ami-0c6b1d09930fac512'
    'us-east-2':
      ImageId: 'ami-0ebbf2179e615c338'
    'us-west-1':
      ImageId: 'ami-015954d5e5548d13b'
    'us-west-2':
      ImageId: 'ami-0cb72367e98845d43'
  RegionMap20202411131:
    'ap-south-2':
      ImageId: 'ami-02df2ab6652b1d48c'
    'ap-south-1':
      ImageId: 'ami-0a2d6587128040372'
    'eu-south-1':
      ImageId: 'ami-0c9d2d6f0e9eb35ba'
    'eu-south-2':
      ImageId: 'ami-09f6eeda628ab3c3b'
    'me-central-1':
      ImageId: 'ami-07c50fc5137a50591'
    'il-central-1':
      ImageId: 'ami-0dad212801be59965'
    'ca-central-1':
      ImageId: 'ami-0893038a49d81a664'
    'eu-central-1':
      ImageId: 'ami-0d52a4bd932508da0'
    'eu-central-2':
      ImageId: 'ami-04b3bafd71f616a85'
    'us-west-1':
      ImageId: 'ami-00114ce822919b9d0'
    'us-west-2':
      ImageId: 'ami-0caf77f9b87412c51'
    'af-south-1':
      ImageId: 'ami-04cebf330302d6dbd'
    'eu-north-1':
      ImageId: 'ami-062ec725a121a65a3'
    'eu-west-3':
      ImageId: 'ami-00706d218fa27caea'
    'eu-west-2':
      ImageId: 'ami-0fe3baafbb3841a8b'
    'eu-west-1':
      ImageId: 'ami-0a09a25a3d0574b76'
    'ap-northeast-3':
      ImageId: 'ami-06f41e74d78cf0e25'
    'ap-northeast-2':
      ImageId: 'ami-0557d60e6a01a934f'
    'me-south-1':
      ImageId: 'ami-0aed90ff09a0fcdd3'
    'ap-northeast-1':
      ImageId: 'ami-09260a0ff6a218e6e'
    'sa-east-1':
      ImageId: 'ami-0bcd1863fab2956e6'
    'ap-east-1':
      ImageId: 'ami-0b443fc33d00d05e1'
    'ca-west-1':
      ImageId: 'ami-08040621020ed939d'
    'ap-southeast-1':
      ImageId: 'ami-035bdfdb33c502d91'
    'ap-southeast-2':
      ImageId: 'ami-00c74e512b7a1c9e2'
    'ap-southeast-3':
      ImageId: 'ami-06df0dbd0fa6388ac'
    'ap-southeast-4':
      ImageId: 'ami-01565953681c68b93'
    'us-east-1':
      ImageId: 'ami-09e4ba81d75ebeb6a'
    'ap-southeast-5':
      ImageId: 'ami-099d2d7ca626867f3'
    'us-east-2':
      ImageId: 'ami-0c1d914711f05b265'
Conditions:
  HasAlertingModule: !Not [!Equals [!Ref AlertingModule, '']]
  HasBastionModule: !Not [!Equals [!Ref BastionModule, '']]
  HasNotBastionModule: !Not [!Condition HasBastionModule]
  HasHostedZoneModule: !Not [!Equals [!Ref HostedZoneModule, '']]
  HasFileSystemModule1: !Not [!Equals [!Ref FileSystemModule1, '']]
  HasVolumeModule1: !Not [!Equals [!Ref VolumeModule1, '']]
  HasKeyName: !Not [!Equals [!Ref KeyName, '']]
  HasIAMUserSSHAccess: !Equals [!Ref IAMUserSSHAccess, 'true']
  HasSystemsManagerAccess: !Equals [!Ref SystemsManagerAccess, 'true']
  HasName: !Not [!Equals [!Ref Name, '']]
  HasSubnetReachPublic: !Equals [!Ref SubnetReach, Public]
  HasSubnetReachPrivate: !Equals [!Ref SubnetReach, Private]
  HasIngressTcpPort1: !Not [!Equals [!Ref IngressTcpPort1, '']]
  HasIngressTcpClientSgModule1: !Not [!Equals [!Ref IngressTcpClientSgModule1, '']]
  HasIngressTcpPort2: !Not [!Equals [!Ref IngressTcpPort2, '']]
  HasIngressTcpClientSgModule2: !Not [!Equals [!Ref IngressTcpClientSgModule2, '']]
  HasIngressTcpPort3: !Not [!Equals [!Ref IngressTcpPort3, '']]
  HasIngressTcpClientSgModule3: !Not [!Equals [!Ref IngressTcpClientSgModule3, '']]
  HasHostedZoneModuleAndSubnetReachPublic: !And [!Condition HasHostedZoneModule, !Condition HasSubnetReachPublic]
  HasHostedZoneModuleAndSubnetReachPrivate: !And [!Condition HasHostedZoneModule, !Condition HasSubnetReachPrivate]
  HasClientSgModule1: !Not [!Equals [!Ref ClientSgModule1, '']]
  HasClientSgModule2: !Not [!Equals [!Ref ClientSgModule2, '']]
  HasClientSgModule3: !Not [!Equals [!Ref ClientSgModule3, '']]
  HasManagedPolicyArns: !Not [!Equals [!Ref ManagedPolicyArns, '']]
Resources:
  RecordSetPublicIpAddress:
    Condition: HasHostedZoneModuleAndSubnetReachPublic
    Type: 'AWS::Route53::RecordSet'
    Properties:
      HostedZoneId:
        'Fn::ImportValue': !Sub '${HostedZoneModule}-Id'
      Name: !Sub
      - '${SubDomainNameWithDot}${HostedZoneName}'
      - SubDomainNameWithDot: !Ref SubDomainNameWithDot
        HostedZoneName:
          'Fn::ImportValue': !Sub '${HostedZoneModule}-Name'
      ResourceRecords:
      - !Ref ElasticIP
      TTL: 60
      Type: A
  RecordSetPrivateIpAddress:
    Condition: HasHostedZoneModuleAndSubnetReachPrivate
    Type: 'AWS::Route53::RecordSet'
    Properties:
      HostedZoneId:
        'Fn::ImportValue': !Sub '${HostedZoneModule}-Id'
      Name: !Sub
      - '${SubDomainNameWithDot}${HostedZoneName}'
      - SubDomainNameWithDot: !Ref SubDomainNameWithDot
        HostedZoneName:
          'Fn::ImportValue': !Sub '${HostedZoneModule}-Name'
      ResourceRecords:
      - !GetAtt 'Instance.PrivateIp'
      TTL: 60
      Type: A
  LogGroup:
    Type: 'AWS::Logs::LogGroup'
    Properties:
      RetentionInDays: !Ref LogGroupRetentionInDays
  SecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: !Ref 'AWS::StackName'
      VpcId:
        'Fn::ImportValue': !Sub '${VpcModule}-Id'
  SecurityGroupIngressSSHBastion:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Condition: HasBastionModule
    Properties:
      GroupId: !Ref SecurityGroup
      IpProtocol: tcp
      FromPort: 22
      ToPort: 22
      SourceSecurityGroupId:
        'Fn::ImportValue': !Sub '${BastionModule}-SecurityGroupId'
  SecurityGroupIngressSSHWorld:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Condition: HasNotBastionModule
    Properties:
      GroupId: !Ref SecurityGroup
      IpProtocol: tcp
      FromPort: 22
      ToPort: 22
      CidrIp: '0.0.0.0/0'
  SecurityGroupIngressTcpPort1:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Condition: HasIngressTcpPort1
    Properties:
      GroupId: !Ref SecurityGroup
      IpProtocol: tcp
      FromPort: !Ref IngressTcpPort1
      ToPort: !Ref IngressTcpPort1
      SourceSecurityGroupId: !If [HasIngressTcpClientSgModule1, {'Fn::ImportValue': !Sub '${IngressTcpClientSgModule1}-SecurityGroupId'}, !Ref 'AWS::NoValue']
      CidrIp: !If [HasIngressTcpClientSgModule1, !Ref 'AWS::NoValue', '0.0.0.0/0']
  SecurityGroupIngressTcpPort2:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Condition: HasIngressTcpPort2
    Properties:
      GroupId: !Ref SecurityGroup
      IpProtocol: tcp
      FromPort: !Ref IngressTcpPort2
      ToPort: !Ref IngressTcpPort2
      SourceSecurityGroupId: !If [HasIngressTcpClientSgModule2, {'Fn::ImportValue': !Sub '${IngressTcpClientSgModule2}-SecurityGroupId'}, !Ref 'AWS::NoValue']
      CidrIp: !If [HasIngressTcpClientSgModule2, !Ref 'AWS::NoValue', '0.0.0.0/0']
  SecurityGroupIngressTcpPort3:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Condition: HasIngressTcpPort3
    Properties:
      GroupId: !Ref SecurityGroup
      IpProtocol: tcp
      FromPort: !Ref IngressTcpPort3
      ToPort: !Ref IngressTcpPort3
      SourceSecurityGroupId: !If [HasIngressTcpClientSgModule3, {'Fn::ImportValue': !Sub '${IngressTcpClientSgModule3}-SecurityGroupId'}, !Ref 'AWS::NoValue']
      CidrIp: !If [HasIngressTcpClientSgModule3, !Ref 'AWS::NoValue', '0.0.0.0/0']
  InstanceProfile:
    Type: 'AWS::IAM::InstanceProfile'
    Properties:
      Roles:
      - !Ref Role
  Role:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Principal:
            Service: 'ec2.amazonaws.com'
          Action: 'sts:AssumeRole'
      ManagedPolicyArns: !If [HasManagedPolicyArns, !Split [',', !Ref ManagedPolicyArns], !Ref 'AWS::NoValue']
      Policies:
      - !If
        - HasSystemsManagerAccess
        - PolicyName: ssm
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
            - Effect: Allow
              Action:
              - 'ssmmessages:*' # SSM Agent by https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-setting-up-messageAPIs.html
              - 'ssm:UpdateInstanceInformation' # SSM agent by https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-setting-up-messageAPIs.html
              - 'ec2messages:*' # SSM Session Manager by https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-setting-up-messageAPIs.html
              Resource: '*'
        - !Ref 'AWS::NoValue'
      - PolicyName: logs
        PolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Action:
            - 'logs:CreateLogGroup'
            - 'logs:CreateLogStream'
            - 'logs:PutLogEvents'
            - 'logs:DescribeLogStreams'
            Resource: !GetAtt 'LogGroup.Arn'
  PolicySshAccess:
    Type: 'AWS::IAM::Policy'
    Condition: HasIAMUserSSHAccess
    Properties:
      Roles:
      - !Ref Role
      PolicyName: 'ssh-access'
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Action:
          - 'iam:ListUsers'
          - 'iam:GetGroup'
          Resource: '*'
        - Effect: Allow
          Action:
          - 'iam:ListSSHPublicKeys'
          - 'iam:GetSSHPublicKey'
          Resource: !Sub 'arn:${AWS::Partition}:iam::${AWS::AccountId}:user/*'
        - Effect: Allow
          Action: 'ec2:DescribeTags'
          Resource: '*'
  ElasticIP:
    Condition: HasSubnetReachPublic
    Type: 'AWS::EC2::EIP'
    Properties:
      Domain: vpc
  NetworkInterface:
    Type: 'AWS::EC2::NetworkInterface'
    Properties:
      GroupSet:
      - !Ref SecurityGroup
      - !If [HasClientSgModule1, {'Fn::ImportValue': !Sub '${ClientSgModule1}-SecurityGroupId'}, !Ref 'AWS::NoValue']
      - !If [HasClientSgModule2, {'Fn::ImportValue': !Sub '${ClientSgModule2}-SecurityGroupId'}, !Ref 'AWS::NoValue']
      - !If [HasClientSgModule3, {'Fn::ImportValue': !Sub '${ClientSgModule3}-SecurityGroupId'}, !Ref 'AWS::NoValue']
      SubnetId:
        'Fn::ImportValue': !Sub '${VpcModule}-SubnetId${AZChar}${SubnetReach}'
  EIPAssociation:
    Condition: HasSubnetReachPublic
    Type: 'AWS::EC2::EIPAssociation'
    Properties:
      AllocationId: !GetAtt 'ElasticIP.AllocationId'
      NetworkInterfaceId: !Ref NetworkInterface
  Instance:
    Type: 'AWS::EC2::Instance'
    Metadata:
      'AWS::CloudFormation::Init':
        configSets:
          default: !If [HasIAMUserSSHAccess, [dependsonhack, awslogs, ssh-access, config], [dependsonhack, awslogs, config]]
        dependsonhack:
          files:
            '/opt/aws/dependsonhack.txt': # CloudFormation does not support using conditions in DependsOn, therfore we create the dependency to the EIP with a hack
              content: !If [HasSubnetReachPublic, !Sub 'hack-${EIPAssociation}', 'hack']
              mode: '000644'
              owner: root
              group: root
        awslogs:
          packages:
            yum:
              awslogs: []
          files:
            '/etc/awslogs/awscli.conf':
              content: !Sub |
                [default]
                region = ${AWS::Region}
                [plugins]
                cwlogs = cwlogs
              mode: '000644'
              owner: root
              group: root
            '/etc/awslogs/awslogs.conf':
              content: !Sub |
                [general]
                state_file = /var/lib/awslogs/agent-state
                [/var/log/amazon/ssm/amazon-ssm-agent.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/amazon/ssm/amazon-ssm-agent.log
                log_stream_name = {instance_id}/var/log/amazon/ssm/amazon-ssm-agent.log
                log_group_name = ${LogGroup}
                [/var/log/amazon/ssm/errors.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/amazon/ssm/errors.log
                log_stream_name = {instance_id}/var/log/amazon/ssm/errors.log
                log_group_name = ${LogGroup}
                [/var/log/audit/audit.log]
                file = /var/log/audit/audit.log
                log_stream_name = {instance_id}/var/log/audit/audit.log
                log_group_name = ${LogGroup}
                [/var/log/awslogs.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/awslogs.log
                log_stream_name = {instance_id}/var/log/awslogs.log
                log_group_name = ${LogGroup}
                [/var/log/boot.log]
                file = /var/log/boot.log
                log_stream_name = {instance_id}/var/log/boot.log
                log_group_name = ${LogGroup}
                [/var/log/cfn-hup.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/cfn-hup.log
                log_stream_name = {instance_id}/var/log/cfn-hup.log
                log_group_name = ${LogGroup}
                [/var/log/cfn-init-cmd.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/cfn-init-cmd.log
                log_stream_name = {instance_id}/var/log/cfn-init-cmd.log
                log_group_name = ${LogGroup}
                [/var/log/cfn-init.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/cfn-init.log
                log_stream_name = {instance_id}/var/log/cfn-init.log
                log_group_name = ${LogGroup}
                [/var/log/cfn-wire.log]
                datetime_format = %Y-%m-%d %H:%M:%S
                file = /var/log/cfn-wire.log
                log_stream_name = {instance_id}/var/log/cfn-wire.log
                log_group_name = ${LogGroup}
                [/var/log/cloud-init-output.log]
                file = /var/log/cloud-init-output.log
                log_stream_name = {instance_id}/var/log/cloud-init-output.log
                log_group_name = ${LogGroup}
                [/var/log/cloud-init.log]
                datetime_format = %b %d %H:%M:%S
                file = /var/log/cloud-init.log
                log_stream_name = {instance_id}/var/log/cloud-init.log
                log_group_name = ${LogGroup}
                [/var/log/cron]
                datetime_format = %b %d %H:%M:%S
                file = /var/log/cron
                log_stream_name = {instance_id}/var/log/cron
                log_group_name = ${LogGroup}
                [/var/log/dmesg]
                file = /var/log/dmesg
                log_stream_name = {instance_id}/var/log/dmesg
                log_group_name = ${LogGroup}
                [/var/log/grubby_prune_debug]
                file = /var/log/grubby_prune_debug
                log_stream_name = {instance_id}/var/log/grubby_prune_debug
                log_group_name = ${LogGroup}
                [/var/log/maillog]
                datetime_format = %b %d %H:%M:%S
                file = /var/log/maillog
                log_stream_name = {instance_id}/var/log/maillog
                log_group_name = ${LogGroup}
                [/var/log/messages]
                datetime_format = %b %d %H:%M:%S
                file = /var/log/messages
                log_stream_name = {instance_id}/var/log/messages
                log_group_name = ${LogGroup}
                [/var/log/secure]
                datetime_format = %b %d %H:%M:%S
                file = /var/log/secure
                log_stream_name = {instance_id}/var/log/secure
                log_group_name = ${LogGroup}
                [/var/log/yum.log]
                datetime_format = %b %d %H:%M:%S
                file = /var/log/yum.log
                log_stream_name = {instance_id}/var/log/yum.log
                log_group_name = ${LogGroup}
              mode: '000644'
              owner: root
              group: root
          services:
            sysvinit:
              awslogsd:
                enabled: true
                ensureRunning: true
                packages:
                  yum:
                  - awslogs
                files:
                - '/etc/awslogs/awslogs.conf'
                - '/etc/awslogs/awscli.conf'
        ssh-access:
          packages:
            rpm:
              aws-ec2-ssh: 'https://s3-eu-west-1.amazonaws.com/widdix-aws-ec2-ssh-releases-eu-west-1/aws-ec2-ssh-1.9.2-1.el7.centos.noarch.rpm'
          commands:
            a_configure_sudo:
              command: 'sed -i ''s/SUDOERS_GROUPS=""/SUDOERS_GROUPS="##ALL##"/g'' /etc/aws-ec2-ssh.conf'
              test: 'grep -q ''SUDOERS_GROUPS=""'' /etc/aws-ec2-ssh.conf'
            b_enable:
              command: 'sed -i ''s/DONOTSYNC=1/DONOTSYNC=0/g'' /etc/aws-ec2-ssh.conf && /usr/bin/import_users.sh'
              test: 'grep -q ''DONOTSYNC=1'' /etc/aws-ec2-ssh.conf'
        config:
          files:
            '/etc/cfn/cfn-hup.conf':
              content: !Sub |
                [main]
                stack=${AWS::StackId}
                region=${AWS::Region}
                interval=1
              mode: '000400'
              owner: root
              group: root
            '/etc/cfn/hooks.d/cfn-auto-reloader.conf':
              content: !Sub |
                [cfn-auto-reloader-hook]
                triggers=post.update
                path=Resources.Instance.Metadata.AWS::CloudFormation::Init
                action=/opt/aws/bin/cfn-init --verbose --stack=${AWS::StackName} --region=${AWS::Region} --resource=Instance
                runas=root
          services:
            sysvinit:
              cfn-hup:
                enabled: true
                ensureRunning: true
                files:
                - '/etc/cfn/cfn-hup.conf'
                - '/etc/cfn/hooks.d/cfn-auto-reloader.conf'
              amazon-ssm-agent:
                enabled: !If [HasSystemsManagerAccess, true, false]
                ensureRunning: !If [HasSystemsManagerAccess, true, false]
    Properties:
      IamInstanceProfile: !Ref InstanceProfile
      ImageId: !FindInMap [!FindInMap [VersionMap, !Ref AmazonLinux2Version, Map], !Ref 'AWS::Region', ImageId]
      InstanceType: !Ref InstanceType
      KeyName: !If [HasKeyName, !Ref KeyName, !Ref 'AWS::NoValue']
      NetworkInterfaces:
      - DeviceIndex: '0'
        NetworkInterfaceId: !Ref NetworkInterface
      UserData:
        'Fn::Base64': !Sub
        - |
            #!/bin/bash -ex
            trap '/opt/aws/bin/cfn-signal -e 1 --region ${Region} --stack ${StackName} --resource Instance' ERR
            ${UserDataMountFileSystem1}
            ${UserDataMountVolume1}
            mount -a
            /opt/aws/bin/cfn-init -v --region ${Region} --stack ${StackName} --resource Instance
            ${UserData}
            /opt/aws/bin/cfn-signal -e 0 --region ${Region} --stack ${StackName} --resource Instance
        - Region: !Ref 'AWS::Region'
          StackName: !Ref 'AWS::StackName'
          UserDataMountFileSystem1: !If [HasFileSystemModule1, !Join ['', ['yum install -y amazon-efs-utils && mkdir -p /mnt/efs1 && echo "', {'Fn::ImportValue': !Sub '${FileSystemModule1}-Id'}, ':/ /mnt/efs1 efs tls,_netdev 0 0" >> /etc/fstab']], '']
          UserDataMountVolume1: !If [HasVolumeModule1, 'while [ ! -b /dev/xvdh ]; do sleep 1; done; blkid /dev/xvdh || mkfs -t ext4 /dev/xvdh; mkdir -p /mnt/volume1; echo "/dev/xvdh /mnt/volume1 ext4 defaults,nofail 0 2" >> /etc/fstab', '']
          UserData: !Ref UserData
      Tags:
      - Key: Name
        Value: !If [HasName, !Ref Name, !Ref 'AWS::StackName']
      Volumes:
      - !If [HasVolumeModule1, {Device: xvdh, VolumeId: {'Fn::ImportValue': !Sub '${VolumeModule1}-Id'}}, !Ref 'AWS::NoValue']
    CreationPolicy:
      ResourceSignal:
        Count: 1
        Timeout: PT10M
  RecoveryAlarm:
    Type: 'AWS::CloudWatch::Alarm'
    Properties:
      AlarmDescription: 'Recovering instance when underlying hardware fails.'
      Namespace: 'AWS/EC2'
      MetricName: StatusCheckFailed_System
      Statistic: Minimum
      Period: 60
      EvaluationPeriods: 5
      ComparisonOperator: GreaterThanThreshold
      Threshold: 0
      AlarmActions:
      - !Sub 'arn:${AWS::Partition}:automate:${AWS::Region}:ec2:recover'
      Dimensions:
      - Name: InstanceId
        Value: !Ref Instance
  CPUTooHighAlarm:
    Condition: HasAlertingModule
    Type: 'AWS::CloudWatch::Alarm'
    Properties:
      AlarmDescription: 'Average CPU utilization over last 10 minutes higher than 80%'
      Namespace: 'AWS/EC2'
      MetricName: CPUUtilization
      Statistic: Average
      Period: 600
      EvaluationPeriods: 1
      ComparisonOperator: GreaterThanThreshold
      Threshold: 80
      AlarmActions:
      - 'Fn::ImportValue': !Sub '${AlertingModule}-Arn'
      Dimensions:
      - Name: InstanceId
        Value: !Ref Instance
Outputs:
  ModuleId:
    Value: 'ec2-instance-amazon-linux2'
  ModuleVersion:
    Value: '2.5.0'
  StackName:
    Value: !Ref 'AWS::StackName'
  Id:
    Value: !Ref Instance
    Export:
      Name: !Sub '${AWS::StackName}-Id'
  SecurityGroupId:
    Value: !Ref SecurityGroup
    Export:
      Name: !Sub '${AWS::StackName}-SecurityGroupId'
  PublicIpAddress:
    Condition: HasSubnetReachPublic
    Value: !Ref ElasticIP
    Export:
      Name: !Sub '${AWS::StackName}-PublicIpAddress'
  PrivateIpAddress:
    Value: !GetAtt 'NetworkInterface.PrimaryPrivateIpAddress'
    Export:
      Name: !Sub '${AWS::StackName}-PrivateIpAddress'