Export existing AWS Lambda and API Gateway to Cloudformation template

Question

How to export existing configured and tested infrastructure (including AWS Lambda functions, API Gateways, ElastiCache clusters, Cloudwatch rules) to Cloudformation template?

I know about Cloudformer tool, but it supports limited number of AWS services (Amazon VPC, DynamoDB, etc) and don't supports some of services which we use. Which tools and approaches can I use in my case for generating Cloudformation template?

Solution

Partial solution: there is ability to export Lambda function to AWS SAM file

and then

We will get YAML file which describes your Lambda function as 'AWS::Serverless::Function'. But there are few things - we can't export Lambda aliases with such approach. Also that doesn't help with API Gateway exporting.

Comments

[MaiKaY]

Out of my experience it makes more sense to write everything from scratch without having a tool which is doing reverse engineering. For sure it means you need to spend much more time but on the other hand you are able to re-think (and understand) your whole infrastructure.

[Hleb Kastseika]

Yeah, the main cause why I'm looking for ways to export existing resources is to save time

[Hleb Kastseika]

But CloudFormer don't supports Lambda functions and API Gateways

[Loaf]

It can get you started at least. CloudFormation is worth it to learn and in the long run will save you more time. What we do is build a POC of what we want, then transfer that to CF and continue building off that template.

[Martin Lottering]

Not sure why but the Export Function option doesn't show on my function. It looks like I'll have to start from scratch too. I was hoping for a starting-template at least to try and save some time.