for and foreach demo

foreach-demo-2/provider.tf

@@ -0,0 +1,4 @@
+provider "aws" {
+  region = var.AWS_REGION
+}
+

foreach-demo-2/securitygroup.tf

@@ -0,0 +1,13 @@
+resource "aws_security_group" "example" {
+  name = "example" # can use expressions here
+
+  dynamic "ingress" {
+    for_each = var.ports
+    content {
+      from_port   = ingress.key
+      to_port     = ingress.key
+      cidr_blocks = ingress.value
+      protocol    = "tcp"
+    }
+  }
+}

foreach-demo-2/vars.tf

@@ -0,0 +1,12 @@
+variable "AWS_REGION" {
+  type    = string
+  default = "eu-west-1"
+}
+
+variable "ports" {
+  type = map(list(string))
+  default = {
+    "22" = [ "127.0.0.1/32", "192.168.0.0/24" ]
+    "443" = [ "0.0.0.0/0" ]
+  }
+}