X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/dc16046dbfdca4a9c0d94971730d220b27e80620..6b08327fb62cc3cfba12c628ab5a947912ebf749:/tools/salt-install/terraform/aws/vpc/main.tf

diff --git a/tools/salt-install/terraform/aws/vpc/main.tf b/tools/salt-install/terraform/aws/vpc/main.tf
index da98f1ac83..dbd17e062c 100644
--- a/tools/salt-install/terraform/aws/vpc/main.tf
+++ b/tools/salt-install/terraform/aws/vpc/main.tf
@@ -62,6 +62,23 @@ resource "aws_subnet" "private_subnet" {
   }
 }
 
+#
+# Additional subnet on a different AZ is required if RDS is enabled
+#
+resource "aws_subnet" "additional_rds_subnet" {
+  count = (var.additional_rds_subnet_id == "" && local.use_rds) ? 1 : 0
+  vpc_id = local.arvados_vpc_id
+  availability_zone = data.aws_availability_zones.available.names[1]
+  cidr_block = "10.1.3.0/24"
+
+  lifecycle {
+    precondition {
+      condition = (var.vpc_id == "")
+      error_message = "additional_rds_subnet_id should be set if vpc_id is also set"
+    }
+  }
+}
+
 #
 # VPC S3 access
 #