Hands-on-CloudFormation-for-deploy-scalability

Hands-on CloudFormation for deploy scalability

• AWS Resource Types Reference

• CloudFormation Templates are JSON formatted files that contain, as top-level sub objects:

  • Resources, the only required sub object, which lists AWS resources to build their properties, dependencies, and so forth.
  • Parameters, which are inputs that configure the Template on a Stack by Stack (instantiation by instantiation) basis.
  • Mappings, which are objects that allow some variations based on keys - for instance, I may need a Mapping to load the correct AMIs of some kind for each region (since AMIs are region-specific).
  • Conditions, which allow basic conditional statements and evaluation based on Parameters and Mappings.
  • Outputs, which allow Template developers to return data from created Stacks for use in other systems or for review by humans.

1. Define Resources

"Resources": {
        "VPC": {},
        "PublicSubnet": {},
        "PrivateSubnet": {},

        "GatewayToInternet": {},
        "NATInstance": {},
        "RoutesForPublicSubnet": {},
        "RoutesForPrivateSubnet": {},
        "GenericNACL": {}
    }

Completing all needed resources.

2. Fill with template snippet from AWS Resource Types Reference

• { "Ref": "?????" }
• CidrBlock-type 0.0.0.0/0
• The top and bottom ports to select all possible ports are "0" and "65535"
• For ImageId mapping combined with the { "Ref": "AWS::Region" }
• "DependsOn": ["GatewayAttachmentToVPC", "InstancesToNATSecurityGroup", "PublicSubnet"]
• Tags (ignored in this lab)

3. EC2 and DynamoDB-related Resources

• LoadBalancer
• AWS::DynamoDB::Table

4. IAM Resources and Security Groups

5. Output and Mappings

• Fn::Join
• Fn::GetAtt
• Fn::FindInMap

6. Launch!