06. Launch Configuration

ND9991 C2 L04 A04.1 Launch Configuration

The following is the syntax used for AutoScaling LaunchConfiguration:

Type: AWS::AutoScaling::LaunchConfiguration
Properties: 
  AssociatePublicIpAddress: Boolean
  BlockDeviceMappings: 
    - BlockDeviceMapping
  ClassicLinkVPCId: String
  ClassicLinkVPCSecurityGroups: 
    - String
  EbsOptimized: Boolean
  IamInstanceProfile: String
  ImageId: String
  InstanceId: String
  InstanceMonitoring: Boolean
  InstanceType: String
  KernelId: String
  KeyName: String
  LaunchConfigurationName: String
  PlacementTenancy: String
  RamDiskId: String
  SecurityGroups: 
    - String
  SpotPrice: String
  UserData: String

The ImageId and Instance Type are the only required properties for a LaunchConfiguration. However, there are many useful properties you will likely want to include.

WebAppLaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Properties:
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          apt-get update -y
          apt-get install unzip awscli -y
          apt-get install apache2 -y
          systemctl start apache2.service
          cd /var/www/html
          aws s3 cp s3://udacity-demo-1/udacity.zip .
          unzip -o udacity.zip
      ImageId: ami-005bdb005fb00e791
      IamInstanceProfile: !Ref ProfileWithRolesForOurApp
      SecurityGroups:
      - Ref: WebServerSecGroup
      InstanceType: t3.small
      BlockDeviceMappings:
      - DeviceName: "/dev/sdk"
        Ebs:
          VolumeSize: '10'

In the above example we have done the following:

  • Specified 10gbs for our VolumeSize.
  • Referenced the previously defined WebServerSecGroup for our SecurityGroup
  • Set our InstanceType to t3.medium for our EC2 Instance

To see all available instance types click here.


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