Refactoring - CloudFormation Template

It's been too long since I worked on this project. My weekends have been focused on my other hobbies and when I'm up for AWS, I have been working through the class. I am 90% through Adrian Cantrill's SAA-C03 course now (highly recommended btw) and am pushing to complete it.

Cross-Stack References

I just finished the course section on CloudFormation, so I am organizing my stack template and writing a short post. I have everything in a single template it's getting rather large and unruly. I am going to group stack resources logically into their own stacks and use Cross-Stack References. By making the stacks modular, they should reusable, faster to deploy and easier to maintain.

I created 5 template files to :

• vpc.yaml - VPC, Subnets, IGW, and Route Tables
• ssm.yaml - Roles, Endpoints and Security Groups for SSM
• app.yaml - The EC2 and Instance Profile
• db.yaml - RDS Instance, DB Subnet Group and Ingress/Egress Security Groups
• fck-nat.yaml - Launch Template, Auto-Scaling Group, Interface, etc. needed for fck-nat

After some copying pasting resources into their new template files, I specified Outputs where needed, and referenced the outputs with!ImportValue in the other templates. With only minimal issues, it was up and running.

I still need to set up an S3 Bucket and CloudFront before I switch to bootstrapping the Rails deployments. However, with the commuter challenge coming up in June it may be some time before I get to it.