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@cfn-modules/asg-singleton-amazon-linux2

v2.3.0

Published

AWS Auto Scaling Group running a single EC2 instance based on Amazon Linux 2 with a fixed public IP address (Elastic IP), alerting, IAM user SSH access, following an immutable infrastructure approach (root volume can be replaced at any time)

Downloads

33

Vulnerabilities

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  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

andreaswittigandreaswittighellomichibyehellomichibye

Keywords

cfn-modulescfn-modules:ExposeNamecfn-modules:ExposeSecurityGroupId

Readme

Build Status NPM version

cfn-modules: AWS Auto Scaling Group singleton (Amazon Linux 2)

AWS Auto Scaling Group running a single EC2 instance based on Amazon Linux 2 with a fixed public IP address (Elastic IP), alerting, IAM user SSH access, following an immutable infrastructure approach (root volume can be replaced at any time).

Install

Install Node.js and npm first!

npm i @cfn-modules/asg-singleton-amazon-linux2

Usage

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'cfn-modules example'
Resources:
  Asg:
    Type: 'AWS::CloudFormation::Stack'
    Properties:
      Parameters:
        VpcModule: !GetAtt 'Vpc.Outputs.StackName' # required
        AlertingModule: !GetAtt 'Alerting.Outputs.StackName' # optional
        BastionModule: !GetAtt 'Bastion.Outputs.StackName' # optional
        HostedZoneModule: !GetAtt 'HostedZone.Outputs.StackName' # optional
        KeyName: '' # optional
        IAMUserSSHAccess: false # optional
        SystemsManagerAccess: true # optional
        InstanceType: 't2.micro' # optional
        Name: 'test' # optional
        AZChar: 'A' # optional
        SubnetReach: 'Public' # optional
        LogGroupRetentionInDays: 14 # optional
        SubDomainNameWithDot: 'test.' # optional
        UserData: '' # optional
        IngressTcpPort1: '' # optional
        IngressTcpClientSgModule1: '' # optional
        IngressTcpPort2: '' # optional
        IngressTcpClientSgModule2: '' # optional
        IngressTcpPort3: '' # optional
        IngressTcpClientSgModule3: '' # optional
        ClientSgModule1: '' # optional
        ClientSgModule2: '' # optional
        ClientSgModule3: '' # optional
        FileSystemModule1: '' # optional
        AmazonLinux2Version: '2.0.20180622.1' # set this to the latest available version!
        ManagedPolicyArns: '' # optional
      TemplateURL: './node_modules/@cfn-modules/asg-singleton-amazon-linux2/module.yml'

Examples

Related modules

Parameters

Limitations

  • Highly available: A single EC2 instance is running at a time (will be automatically replaced in case of failure)
  • Scalable: EC2 instances capacity (CPU, RAM, network, ...) is limited by design
  • Secure: Root volume is not encrypted at-rest (not possible unless the AMI is encrypted)
  • Secure: Root volume it not backed up
  • Monitoring: Network In+Out is not monitored according to capacity of instance type

Migration Guides

Migrate to v2

  • If SystemsManagerAccess is set to true, we no longer attach the AWS managed policy AmazonEC2RoleforSSM for security reasons. Instead we only allow the SSM agent to communicate with the backend and we enable Session Manager. If you need more permissions, checkout our SSM example.