Add terraform configurations for single-cluster ref arch

Author: nandajavarma

install/infra/single-cluster/aws/Makefile

@@ -21,6 +21,53 @@ apply: apply-cluster apply-tools
 .PHONY: destroy
 destroy: destroy-tools destroy-cluster
 
+.PHONY: plan-cluster
+plan-cluster:
+	@terraform plan -target=module.eks
+
+.PHONY: plan-tools
+plan-tools: plan-cm-edns plan-cluster-issuer
+
+.PHONY: plan-cm-edns
+plan-cm-edns:
+	@terraform plan -target=module.certmanager -target=module.externaldns
+
+.PHONY: plan-cluster-issuer
+plan-cluster-issuer:
+	@terraform plan -target=module.cluster-issuer
+
+.PHONY: apply-cluster
+apply-cluster:
+	@terraform apply -target=module.eks --auto-approve
+
+.PHONY: apply-tools
+apply-tools: install-cm-edns install-cluster-issuer
+
+.PHONY: install-cm-edns
+install-cm-edns:
+	@terraform apply -target=module.certmanager -target=module.externaldns --auto-approve
+
+PHONY: install-cluster-issuer
+install-cluster-issuer:
+	@terraform apply -target=module.cluster-issuer  --auto-approve
+
+.PHONY: destroy-cluster
+destroy-cluster:
+	@terraform destroy -target=module.eks --auto-approve
+
+.PHONY: destroy-tools
+destroy-tools: destroy-cluster-issuer destroy-cm-edns
+
+.PHONY: destroy-cm-edns
+destroy-cm-edns:
+	@terraform destroy -target=module.certmanager  -target=module.externaldns --auto-approve
+
+.PHONY: destroy-cluster-issuer
+destroy-cluster-issuer:
+	@terraform destroy -target=module.cluster-issuer  --auto-approve
+
+## Output targets
+
 .PHONY: refresh
 refresh:
 	@echo "Refreshing terraform state"
@@ -73,49 +120,4 @@ output-issuer:
 	@echo "================="
 	@terraform output -json cluster_issuer | jq
 
-.PHONY: plan-cluster
-plan-cluster:
-	@terraform plan -target=module.eks
-
-.PHONY: plan-tools
-plan-tools: plan-cm-edns plan-cluster-issuer
-
-.PHONY: plan-cm-edns
-plan-cm-edns:
-	@terraform plan -target=module.certmanager -target=module.externaldns
-
-.PHONY: plan-cluster-issuer
-plan-cluster-issuer:
-	@terraform plan -target=module.cluster-issuer
-
-.PHONY: apply-cluster
-apply-cluster:
-	@terraform apply -target=module.eks --auto-approve
-
-.PHONY: apply-tools
-apply-tools: install-cm-edns install-cluster-issuer
-
-.PHONY: install-cm-edns
-install-cm-edns:
-	@terraform apply -target=module.certmanager -target=module.externaldns --auto-approve
-
-PHONY: install-cluster-issuer
-install-cluster-issuer:
-	@terraform apply -target=module.cluster-issuer  --auto-approve
-
-.PHONY: destroy-cluster
-destroy-cluster:
-	@terraform destroy -target=module.eks --auto-approve
-
-.PHONY: destroy-tools
-destroy-tools: destroy-cluster-issuer destroy-cm-edns
-
-.PHONY: destroy-cm-edns
-destroy-cm-edns:
-	@terraform destroy -target=module.certmanager  -target=module.externaldns --auto-approve
-
-.PHONY: destroy-cluster-issuer
-destroy-cluster-issuer:
-	@terraform destroy -target=module.cluster-issuer  --auto-approve
-
 # end

install/infra/single-cluster/aws/README.md

@@ -97,6 +97,9 @@ corresponding TLS certificate requests.
 
 ## Initialize terraform backend and confirm the plan
 
+> ⚠️  We ship 4 terraform modules here and some of them have dependencies among each other (eg: `cert-manager` module depends on `eks` module for `kubeconfig`, or the `cluster-issuer` module depends on `cert-manager` for the CRD). Hence a simple run of `terraform plan` or `terraform apply` may lead to errors. Hence we wrap [targeted `terraform` operations](https://learn.hashicorp.com/tutorials/terraform/resource-targeting) in the following make targets. If you wish you use `terraform` commands instead, please make sure you look into the Makefile to understand the target order.
+
+
 * Initialize the terraform backend with:
 
   ``` sh

install/infra/single-cluster/aws/main.tf

@@ -1,6 +1,6 @@
 terraform {
   backend "s3" {
-    bucket = "nan-tf-bucket"
+    bucket = "gitpod-tf"
     key    = "aws/terraform.state"
   }
 }

install/infra/single-cluster/aws/terraform.tfvars

@@ -1,8 +1,8 @@
-# the cluster_name should be of length less than 16 characters
-cluster_name = "nan"
+# the cluster_name should be of length less than 15 characters and surrounded by double quotes
+cluster_name =
 
-# a route53 zone and certificate request will be created for this domain
-domain_name = "nan-cluster.doptig.com"
+# a route53 zone and certificate request will be created for this domain and surrounded by double quotes
+domain_name =
 
 region = "eu-west-1"
 

install/tests/main.tf

@@ -92,6 +92,9 @@ module "eks" {
   image_id               = var.eks_node_image_id
   kubeconfig             = var.kubeconfig
   cluster_version        = var.cluster_version
+  create_external_registry = true
+  create_external_database = true
+  create_external_storage  = true
 }
 
 module "certmanager" {