feat: Add support for allowing EFA network interfaces (#1980)

examples/self_managed_node_group/main.tf

@@ -146,6 +146,37 @@ module "eks" {
       }
     }
 
+    efa = {
+      min_size     = 1
+      max_size     = 2
+      desired_size = 1
+
+      # aws ec2 describe-instance-types --region eu-west-1 --filters Name=network-info.efa-supported,Values=true --query "InstanceTypes[*].[InstanceType]" --output text | sort
+      instance_type = "c5n.9xlarge"
+
+      post_bootstrap_user_data = <<-EOT
+
+      # Install EFA
+      curl -O https://efa-installer.amazonaws.com/aws-efa-installer-latest.tar.gz
+      tar -xf aws-efa-installer-latest.tar.gz && cd aws-efa-installer
+      ./efa_installer.sh -y --minimal
+      fi_info -p efa -t FI_EP_RDM
+
+      # Disable ptrace
+      sysctl -w kernel.yama.ptrace_scope=0
+      EOT
+
+      network_interfaces = [
+        {
+          description                 = "EFA interface example"
+          delete_on_termination       = true
+          device_index                = 0
+          associate_public_ip_address = false
+          interface_type              = "efa"
+        }
+      ]
+    }
+
     # Complete
     complete = {
       name            = "complete-self-mng"