Make node pool taint non-mandatory (#43)

node_pool/CHANGELOG.md

@@ -1,5 +1,12 @@
+# node-pool-v3.5.0
+- Fixed taints so that Terraform won't error out if you don't specify them on a node pool
+
+# node-pool-v3.4.0
+- Added taints to node pool module (mandatory, mistakenly)
+
 # node-pool-v3.3.1
 - Added the ability to enable secure boot on nodes when the cluster uses shielded nodes. This can be enabled with the variable `enable_secure_boot`
+
 # node-pool-v3.3.0
 - Added `node_metadata` parameter to control node metadata provided to workload, so that [workload identity](https://cloud.google.com/kubernetes-engine/docs/how-to/workload-identity) functionality may be used.
 

node_pool/inputs.tf

@@ -90,4 +90,5 @@ variable "enable_secure_boot" {
 variable "taint" {
   description = "Key value pairs of taints to apply on nodes in the pool"
   type        = map
+  default     = null
 }

node_pool/main.tf

@@ -75,16 +75,16 @@ resource "google_container_node_pool" "node_pool" {
     }
 
     dynamic "taint" {
-      for_each = [var.taint]
+      for_each = toset(var.taint == null ? [] : [var.taint])
       content {
         # TF-UPGRADE-TODO: The automatic upgrade tool can't predict
         # which keys might be set in maps assigned here, so it has
         # produced a comprehensive set here. Consider simplifying
         # this after confirming which keys can be set in practice.
 
-        effect = taint.value.effect
-        key    = taint.value.key
-        value  = taint.value.value
+        effect = var.taint.effect
+        key    = var.taint.key
+        value  = var.taint.value
       }
     }
 
@@ -100,4 +100,3 @@ resource "google_container_node_pool" "node_pool" {
     create_before_destroy = true
   }
 }
-