CloudFormation Conditions¶

• Conditions are used to control the creation of resources or outputs based on a condition.
• Conditions can be whatever you want them to be, but common ones are:
  • Environment (dev / test / prod)
  • AWS Region
  • Any parameter value
• Each condition can reference another condition, parameter value or mapping

Conditions:
    CreateProdResources: !Equal [ !Ref EnvType, prod ]

• The logical ID is for you yo choose. It's how you name condition

• The intrinsic function (logical) can be any of the following:

  • Fn::And
  • Fn::Equals
  • Fn::If
  • Fn::Not
  • Fn::Or

• These can be applied to resources / outputs etc

Resources:
    MountPoint:
        Type: AWS::EC2::VolumeAttachment
        Condition: CreateProdResources