aws-devops-sysops-labs/cloudformation/0-cfn-hup-demo.yml at main · omonuj/aws-devops-sysops-labs · GitHub

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AWSTemplateFormatVersion: '2010-09-09'
Description: Deploy a web server with cfn-init and cfn-hup, serving a custom HTML page

Resources:
  WebServerSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Enable HTTP access
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: 0.0.0.0/0

  MyInstance:
    Type: AWS::EC2::Instance
    Metadata:
      AWS::CloudFormation::Init:
        configSets:
          default: ["install", "configure"]
        install:
          packages:
            yum:
              httpd: []
          files:
            "/etc/cfn/cfn-hup.conf":
              content: !Sub |
                [main]
                stack=${AWS::StackId}
                region=${AWS::Region}
                interval=1
            "/etc/cfn/hooks.d/cfn-auto-reloader.conf":
              content: !Sub |
                [cfn-auto-reloader-hook]
                triggers=post.update
                path=Resources.MyInstance.Metadata.AWS::CloudFormation::Init
                action=/opt/aws/bin/cfn-init -v --stack ${AWS::StackName} --resource MyInstance --configsets default --region ${AWS::Region}
                runas=root
        configure:
          files:
            "/var/www/html/index.html":
              content: |
                <html>
                <head>
                  <title>Hello World</title>
                </head>
                <body>
                  <h1>Hello, World! Welcome to my website!</h1>
                  <p> I've added some content to it </p>
                </body>
                </html>
              mode: "000644"
              owner: "root"
              group: "root"
          services:
            sysvinit:
              httpd:
                enabled: "true"
                ensureRunning: "true"
    Properties:
      ImageId: ami-0a3c3a20c09d6f377
      InstanceType: "t3.micro"
      SecurityGroups:
        - Ref: WebServerSecurityGroup
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          yum update -y aws-cfn-bootstrap
          # Initialize cfn-init
          /opt/aws/bin/cfn-init -v --stack ${AWS::StackName} --resource MyInstance --configsets default --region ${AWS::Region}
          # Start cfn-hup
          /opt/aws/bin/cfn-hup || error_exit 'Failed to start cfn-hup'
          # Signal success
          /opt/aws/bin/cfn-signal -e $? --stack ${AWS::StackName} --resource MyInstance --region ${AWS::Region}

Outputs:
  WebsiteURL:
    Description: URL of the website
    Value: !Sub "http://${MyInstance.PublicDnsName}/"