Update the readme with some steps, make worker ami a templated value

Author: bmonkman

README.md

@@ -15,25 +15,45 @@ diagram](./docs/architecture-overview.svg).
 
 ## Getting Started
 
-This is meant to be used with commit0 and not directly. See
-the [commit0](https://github.com/commitdev/commit0) repository for more
-information. The commit0 tool will parse through configuration and fill in any
+This is meant to be used with the commit0 `stack` tool and not directly. See
+the [stack](https://github.com/commitdev/stack) repository for more
+information. The tool will parse through configuration and fill in any
 template variables which need to be encoded into the terraform configuration.
 Once that is done you'll have a directory containing the contents of this
 repository minus the `.git` directory.
 
-### ⚠️ Edits Required
-
-This repository requires post-template configuration edits to the AMI depending
-on the region you chose. To find the appropriate AMI for your region you can use
-the following snippet:
+To generate the templates you will need to provide some values to fill in.
 
+First get the AMI for your region:
 ```shell
 $ REGION=us-east-1
 $ aws ssm get-parameters \
   --names /aws/service/eks/optimized-ami/1.15/amazon-linux-2/recommended/image_id \
   --region $REGION \
-  --query "Parameters[0].Value" | cat
+  --query "Parameters[0].Value"
+```
+
+Then get the aws account id:
+```shell
+aws sts get-caller-identity --query "Account"
+```
+
+Then create a `config.yml` file and fill in the appropriate values:
+
+```yaml
+name: my-project
+
+params:
+  region: us-east-1
+  accountId: <from above>
+  kubeWorkerAMI: ami-<from above>
+  productionHost: domain.com
+  stagingHost: domain-staging.com
+```
+
+And run `stack`:
+```shell
+$ stack -config config.yml commit0-aws-eks-stack/ my-project-infrastructure/
 ```
 
 ### Apply Configuration
@@ -47,7 +67,7 @@ $ make ENV=<environment>
 Configure your k8s context
 
 ```shell
-$ aws eks update-kubeconfig --name <cluster-name> --region us-west-2
+$ aws eks update-kubeconfig --name <cluster-name> --region us-east-1
 ```
 
 Then talk to Bill.

terraform/environments/production/main.tf

@@ -29,7 +29,7 @@ module "production" {
 
   # EKS-Optimized AMI for your region: https://docs.aws.amazon.com/eks/latest/userguide/eks-optimized-ami.html
   # https://us-east-1.console.aws.amazon.com/systems-manager/parameters/%252Faws%252Fservice%252Feks%252Foptimized-ami%252F1.15%252Famazon-linux-2%252Frecommended%252Fimage_id/description?region=us-east-1
-  eks_worker_ami = "ami-0e710550577202c55"
+  eks_worker_ami = "<% index .Params `kubeWorkerAMI` %>"
 
   # Hosting configuration
   s3_hosting_buckets = [

terraform/environments/staging/main.tf

@@ -29,7 +29,7 @@ module "staging" {
 
   # EKS-Optimized AMI for your region: https://docs.aws.amazon.com/eks/latest/userguide/eks-optimized-ami.html
   # https://us-east-1.console.aws.amazon.com/systems-manager/parameters/%252Faws%252Fservice%252Feks%252Foptimized-ami%252F1.15%252Famazon-linux-2%252Frecommended%252Fimage_id/description?region=us-east-1
-  eks_worker_ami = "ami-0e710550577202c55"
+  eks_worker_ami = "<% index .Params `kubeWorkerAMI` %>"
 
   # Hosting configuration
   s3_hosting_buckets = [