rename cos_instance in secure ROKS example

Author: kavya498

examples/secure-roks-cluster/README.md

@@ -67,7 +67,7 @@ Review the following variables that you can customize in your Terraform template
 |ibmcloud_api_key|[IBM Cloud IAM API key](https://cloud.ibm.com/docs/account?topic=account-userapikey#create_user_key).|string|N/A|Yes|
 |region|[IBM Cloud region for the VPC cluster](https://cloud.ibm.com/docs/openshift?topic=openshift-regions-and-zones#zones-vpc).|string|N/A|Yes|
 |resource_group|Name of the [IBM Cloud resource group](https://cloud.ibm.com/docs/account?topic=account-rgs) to create the resources in. If set to `null`, the default resource group is used.|string|`null`|No|
-|cos_instance_name|Name of the IBM Cloud Object Storage instance. If set to `null`, an instance is created with the following naming convention: `<var.resource_prefix>-cos`|string|`null`|No|
+|cos_instance|CRN of the IBM Cloud Object Storage instance. If set to `null`, an instance is created with the following naming convention: `<var.resource_prefix>-cos`|string|`null`|No|
 |resource_prefix|Prefix to use for created resource names.|string|N/A|Yes|
 |flavor|The flavor for the VPC worker nodes to create in the cluster. To list available flavors, run `ibmcloud ks flavors --zone <vpc_region>-1`.|string|`bx2.4x16`|No|
 |ocp_version|Specify the Red Hat OpenShift on IBM Cloud version. To list versions, run `ibmcloud ks versions`.|string|`4.6_openshift`|No|

examples/secure-roks-cluster/cos.tf

@@ -1,12 +1,5 @@
-data "ibm_resource_instance" "cos_instance" {
-  count             = var.cos_instance_name != null ? 1 : 0
-  name              = var.cos_instance_name
-  location          = "global"
-  resource_group_id = data.ibm_resource_group.resource_group.id
-  service           = "cloud-object-storage"
-}
 resource "ibm_resource_instance" "cos_instance" {
-  count             = var.cos_instance_name != null ? 0 : 1
+  count             = var.cos_instance != null ? 0 : 1
   name              = "${var.resource_prefix}-cos"
   location          = "global"
   resource_group_id = data.ibm_resource_group.resource_group.id

examples/secure-roks-cluster/locals.tf

@@ -1,5 +1,5 @@
 locals {
-  cos_crn            = var.cos_instance_name != null ? data.ibm_resource_instance.cos_instance[0].id : ibm_resource_instance.cos_instance[0].id
+  cos_crn            = var.cos_instance != null ? var.cos_instance : ibm_resource_instance.cos_instance[0].id
   sysdig_instance_id = var.sysdig_instance != null ? var.sysdig_instance : module.sysdig_instance[0].sysdig_guid
   logdna_instance_id = var.logdna_instance != null ? var.logdna_instance : module.logdna_instance[0].logdna_instance_guid
   zones              = [for index in range(3) : "${var.region}-${index + 1}"]

examples/secure-roks-cluster/variables.tf

@@ -19,8 +19,8 @@ variable "resource_group" {
 ######################################################
 #IBM-Cloud Object Storage Variables
 ######################################################
-variable "cos_instance_name" {
-  description = "Name of Object Storage Instance. If null it creates an instance with `<var.resource_prefix>-cos"
+variable "cos_instance" {
+  description = "CRN of Object Storage Instance. If null it creates an instance with `<var.resource_prefix>-cos"
   type        = string
   default     = null
 }