feat: Add ability to tag network-interface using Launch Template (#1563)

Author: nikitacr7

examples/launch_templates_with_managed_node_groups/launchtemplate.tf

@@ -80,6 +80,15 @@ resource "aws_launch_template" "default" {
     }
   }
 
+  # Supplying custom tags to EKS instances ENI's is another use-case for LaunchTemplates
+  tag_specifications {
+    resource_type = "network-interface"
+
+    tags = {
+      CustomTag = "EKS example"
+    }
+  }
+
   # Tag the LT itself
   tags = {
     CustomTag = "EKS example"

modules/node_groups/launch_template.tf

@@ -103,6 +103,20 @@ resource "aws_launch_template" "workers" {
     )
   }
 
+  # Supplying custom tags to EKS instances ENI's is another use-case for LaunchTemplates
+  tag_specifications {
+    resource_type = "network-interface"
+
+    tags = merge(
+      var.tags,
+      {
+        Name = local.node_groups_names[each.key]
+      },
+      lookup(var.node_groups_defaults, "additional_tags", {}),
+      lookup(var.node_groups[each.key], "additional_tags", {})
+    )
+  }
+
   # Tag the LT itself
   tags = merge(
     var.tags,

workers_launch_template.tf

@@ -573,6 +573,26 @@ resource "aws_launch_template" "workers_launch_template" {
     )
   }
 
+  tag_specifications {
+    resource_type = "network-interface"
+
+    tags = merge(
+      {
+        "Name" = "${coalescelist(aws_eks_cluster.this[*].name, [""])[0]}-${lookup(
+          var.worker_groups_launch_template[count.index],
+          "name",
+          count.index,
+        )}-eks_asg"
+      },
+      var.tags,
+      {
+        for tag in lookup(var.worker_groups_launch_template[count.index], "tags", local.workers_group_defaults["tags"]) :
+        tag["key"] => tag["value"]
+        if tag["key"] != "Name" && tag["propagate_at_launch"]
+      }
+    )
+  }
+
   tags = var.tags
 
   lifecycle {