for and foreach demo

for-demo-2/ebs.tf

@@ -0,0 +1,7 @@
+
+resource "aws_ebs_volume" "example" {
+  availability_zone = "eu-west-1a"
+  size              = 8
+
+  tags = {for k, v in merge({ Name = "Myvolume" }, var.project_tags): k => lower(v)}
+}

for-demo-2/provider.tf

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

for-demo-2/vars.tf

@@ -0,0 +1,12 @@
+variable "AWS_REGION" {
+  type    = string
+  default = "eu-west-1"
+}
+variable "project_tags" {
+  type          = map(string)
+  default       = {
+    Component   = "Frontend"
+    Environment = "Production"
+  }
+}
+

for-demo/vars.tf

@@ -0,0 +1,17 @@
+variable "list1" {
+  type = list(string)
+  default = [1, 10, 9, 101, 3]
+}
+variable "list2" {
+  type = list(string)
+  default = ["apple", "pear", "banana", "mango"]
+}
+variable "map1" {
+  type = map(number)
+  default = {
+   "apple" = 5
+   "pear" = 3
+   "banana" = 10
+   "mango" = 0
+  }
+}

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" ]
+  }
+}

foreach-demo/provider.tf

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

foreach-demo/securitygroup.tf

@@ -0,0 +1,12 @@
+resource "aws_security_group" "example" {
+  name = "example" # can use expressions here
+
+  dynamic "ingress" {
+    for_each = [22, 443]
+    content {
+      from_port   = ingress.value
+      to_port     = ingress.value
+      protocol    = "tcp"
+    }
+  }
+}

foreach-demo/vars.tf

@@ -0,0 +1,4 @@
+variable "AWS_REGION" {
+  type    = string
+  default = "eu-west-1"
+}