AWS CloudFormation

Hands-On

Demo

In this demo, we will:

Create a CloudFormation template
Launch a CloudFormation stack
Update the stack
Test the deployed resources
Clean up resources

Agenda

Create CloudFormation Stack

AWSTemplateFormatVersion: '2010-09-09'
Description: 'Simple web application infrastructure'

Parameters:
  InstanceType:
    Type: String
    Default: t2.micro
    AllowedValues:
      - t2.micro
      - t2.small
      - t2.medium
    Description: Enter t2.micro, t2.small, or t2.medium. Default is t2.micro.

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

  WebServer:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: ami-0182f373e66f89c85  # Amazon Linux 2 AMI in us-east-1
      InstanceType: !Ref InstanceType
      SecurityGroups:
        - !Ref WebServerSecurityGroup
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          yum update -y
          yum install -y httpd
          systemctl start httpd
          systemctl enable httpd
          echo "<h1>Hello World from CloudFormation!</h1>" > /var/www/html/index.html

Outputs:
  WebsiteURL:
    Description: URL for the web server
    Value: !Sub 'http://${WebServer.PublicDnsName}'

Create stack

WebAppStack

Specify stack details

Configure stack options

Stack failure options

Review and create

Submit

Event History

Resources

Outputs

Test

Update CloudFormation Stack

Update

AWSTemplateFormatVersion: '2010-09-09'
Description: 'Simple web application infrastructure'

Parameters:
  InstanceType:
    Type: String
    Default: t2.micro
    AllowedValues:
      - t2.micro
      - t2.small
      - t2.medium
    Description: Enter t2.micro, t2.small, or t2.medium. Default is t2.micro.

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

  WebServer:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: ami-0182f373e66f89c85  # Amazon Linux 2 AMI in us-east-1
      InstanceType: !Ref InstanceType
      SecurityGroups:
        - !Ref WebServerSecurityGroup
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          yum update -y
          yum install -y httpd
          systemctl start httpd
          systemctl enable httpd
          echo "<h1>Hello World from CloudFormation!</h1>" > /var/www/html/index.html

  WebsiteBucket:
      Type: AWS::S3::Bucket

Outputs:
  WebsiteURL:
    Description: URL for the web server
    Value: !Sub 'http://${WebServer.PublicDnsName}'

  S3BucketName:
      Description: Name of the S3 bucket
      Value: !Ref WebsiteBucket