broker config should be nullable

Signed-off-by: vsoch <vsoch@users.noreply.github.com>
researchapps · Jul 3, 2023 · f91a44e · f91a44e
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diff --git a/fluxfw-gcp/img/README.md b/fluxfw-gcp/img/README.md
@@ -16,9 +16,11 @@ build Flux Framework GCP images.
 ### Packer Build Step Creation
 
 The command
+
 ```bash
 ./create-buildstep.sh
 ```
+
 clones the [cloud builders community](https://github.com/GoogleCloudPlatform/cloud-builders-community) repo, determines the current latest
 Packer version and then invokes Cloud Build to create the Packer build step.
 
@@ -27,9 +29,11 @@ Packer version and then invokes Cloud Build to create the Packer build step.
 The Packer build step requires elevated privileges to create a GCP image. Rather than grant those privileges
 to the Cloud Build service account a separate `image builder` service account is created and granted the
 necessary privileges. The command
+
 ```bash
 ./builder-setup.sh
 ```
+
 creates the `image builder` service account the necessary privileges, downloads its keys, uses the Google Cloud KMS service
 to encrypt them and grants the Cloud Build service account the ability to decrypt them.
 

diff --git a/fluxfw-gcp/tf/variables.tf b/fluxfw-gcp/tf/variables.tf
@@ -16,6 +16,7 @@ variable "broker_config" {
     description = "A custom broker config (system.toml) to provide to the manager"
     type        = string
     default     = ""
+    nullable    = true
 }
 
 variable "cluster_storage" {