feat: Default to clusters OIDC issuer URL for aws_eks_identity_provider_config (#2190)

feat: setting oidc issuer as default option for aws_eks_identity_provider_config

Co-authored-by: Bryant Biggs <bryantbiggs@gmail.com>

Author: igorbrites

examples/complete/main.tf

@@ -196,6 +196,13 @@ module "eks" {
     }
   }
 
+  # OIDC Identity provider
+  cluster_identity_providers = {
+    sts = {
+      client_id = "sts.amazonaws.com"
+    }
+  }
+
   # aws-auth configmap
   manage_aws_auth_configmap = true
 

main.tf

@@ -369,7 +369,7 @@ resource "aws_eks_identity_provider_config" "this" {
     groups_claim                  = lookup(each.value, "groups_claim", null)
     groups_prefix                 = lookup(each.value, "groups_prefix", null)
     identity_provider_config_name = try(each.value.identity_provider_config_name, each.key)
-    issuer_url                    = each.value.issuer_url
+    issuer_url                    = try(each.value.issuer_url, aws_eks_cluster.this[0].identity[0].oidc[0].issuer)
     required_claims               = lookup(each.value, "required_claims", null)
     username_claim                = lookup(each.value, "username_claim", null)
     username_prefix               = lookup(each.value, "username_prefix", null)