docs: Update UPGRADE-18.0.md (terraform-aws-modules#2014)

docs/UPGRADE-18.0.md

@@ -565,6 +565,163 @@ module "cluster_after" {
 }
 ```
 
+### Diff of before <> after
+
+```diff
+ module "eks" {
+   source  = "terraform-aws-modules/eks/aws"
+-  version = "~> 17.0"
++  version = "~> 18.0"
+
+   cluster_name                    = local.name
+   cluster_version                 = local.cluster_version
+   cluster_endpoint_private_access = true
+   cluster_endpoint_public_access  = true
+
+   vpc_id  = module.vpc.vpc_id
+-  subnets = module.vpc.private_subnets
++  subnet_ids = module.vpc.private_subnets
+
+-  # Managed Node Groups
+-  node_groups_defaults = {
++  eks_managed_node_group_defaults = {
+     ami_type  = "AL2_x86_64"
+     disk_size = 50
+   }
+
+-  node_groups = {
++  eks_managed_node_groups = {
+     node_group = {
+-      min_capacity     = 1
+-      max_capacity     = 10
+-      desired_capacity = 1
++      min_size     = 1
++      max_size     = 10
++      desired_size = 1
+
+       instance_types = ["t3.large"]
+       capacity_type  = "SPOT"
+
+       update_config = {
+         max_unavailable_percentage = 50
+       }
+
+-      k8s_labels = {
++      labels = {
+         Environment = "test"
+         GithubRepo  = "terraform-aws-eks"
+         GithubOrg   = "terraform-aws-modules"
+       }
+
+       taints = [
+         {
+           key    = "dedicated"
+           value  = "gpuGroup"
+           effect = "NO_SCHEDULE"
+         }
+       ]
+
+-      additional_tags = {
++      tags = {
+         ExtraTag = "example"
+       }
+     }
+   }
+
+-  # Worker groups
+-  worker_additional_security_group_ids = [aws_security_group.additional.id]
+-
+-  worker_groups_launch_template = [
+-    {
+-      name                    = "worker-group"
+-      override_instance_types = ["m5.large", "m5a.large", "m5d.large", "m5ad.large"]
+-      spot_instance_pools     = 4
+-      asg_max_size            = 5
+-      asg_desired_capacity    = 2
+-      kubelet_extra_args      = "--node-labels=node.kubernetes.io/lifecycle=spot"
+-      public_ip               = true
+-    },
+-  ]
++  self_managed_node_group_defaults = {
++    vpc_security_group_ids = [aws_security_group.additional.id]
++  }
++
++  self_managed_node_groups = {
++    worker_group = {
++      name = "worker-group"
++
++      min_size      = 1
++      max_size      = 5
++      desired_size  = 2
++      instance_type = "m4.large"
++
++      bootstrap_extra_args = "--kubelet-extra-args '--node-labels=node.kubernetes.io/lifecycle=spot'"
++
++      block_device_mappings = {
++        xvda = {
++          device_name = "/dev/xvda"
++          ebs = {
++            delete_on_termination = true
++            encrypted             = false
++            volume_size           = 100
++            volume_type           = "gp2"
++          }
++
++        }
++      }
++
++      use_mixed_instances_policy = true
++      mixed_instances_policy = {
++        instances_distribution = {
++          spot_instance_pools = 4
++        }
++
++        override = [
++          { instance_type = "m5.large" },
++          { instance_type = "m5a.large" },
++          { instance_type = "m5d.large" },
++          { instance_type = "m5ad.large" },
++        ]
++      }
++    }
++  }
+
+   # Fargate
+   fargate_profiles = {
+     default = {
+       name = "default"
+       selectors = [
+         {
+           namespace = "kube-system"
+           labels = {
+             k8s-app = "kube-dns"
+           }
+         },
+         {
+           namespace = "default"
+         }
+       ]
+
+       tags = {
+         Owner = "test"
+       }
+
+       timeouts = {
+         create = "20m"
+         delete = "20m"
+       }
+     }
+   }
+
+   tags = {
+     Environment = "test"
+     GithubRepo  = "terraform-aws-eks"
+     GithubOrg   = "terraform-aws-modules"
+   }
+ }
+
+```
+
 ### Attaching an IAM role policy to a Fargate profile
 
 #### Before 17.x