Merge pull request #7 from prashantkalkar/node_level_image

Updated to support image override at node level.

Author: vinayak03

main.tf

@@ -11,7 +11,7 @@ module "cluster_nodes" {
   node_files_toupload                  = var.nodes[count.index].node_files_toupload
   node_config_script                   = var.node_config_script
   security_groups                      = var.security_groups
-  node_image                           = var.node_image
+  node_image                           = var.nodes[count.index].node_image != null ? var.nodes[count.index].node_image : var.node_image
   jq_download_url                      = var.jq_download_url
   command_timeout_seconds              = var.command_timeout_seconds
   asg_lifecycle_hook_heartbeat_timeout = var.asg_lifecycle_hook_heartbeat_timeout

variables.tf

@@ -1,6 +1,7 @@
 variable "nodes" {
   type = list(object({
     node_ip = string
+    node_image = optional(string)
     node_subnet_id = string
     node_files_toupload = optional(list(object({
       contents = string
@@ -9,6 +10,7 @@ variable "nodes" {
   }))
   description = <<EOT
     node_ip = IP address of the cluster node. This should be available within the subnet.
+    node_image = image for node of the cluster node.
     node_subnet_id = Id of the subnet where node should be created.
     node_files_toupload = list of file to be uploaded per node. These can be cluster confi files etc.
     node_files_toupload.contents = Base64 encoded contents of the file to be uploaded on the node.