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README.md

+# Introduction
+Module to configure backups.
+You can select a resource to backup with `selection tags` or selecting the `resources`.
+
+# Example
+```
+  vault_name = "customer-infra"
+  backup_plan_name = "d1w_w2w"
+  backup_plan_rules = [{
+    name = "d1w"
+    resources = []
+    selection_tag = [{
+      type  = "STRINGEQUALS"
+      key   = "Name"
+      value = "customer-platform-infra"
+    }]
+    schedule           = "cron(0 21 ? * MON-SAT *)"
+    start_window       = 60
+    completion_window  = 240
+    delete_after       = 6
+  },{
+    name = "w2w"
+    resources = []
+    selection_tag = [{
+      type  = "STRINGEQUALS"
+      key   = "Name"
+      value = "customer-platform-infra"
+    }]
+    schedule           = "cron(0 21 ? * SUN *)"
+    start_window       = 60
+    completion_window  = 240
+    delete_after       = 15
+  }]
+```
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main.tf

+resource "aws_backup_vault" "default" {
+  count = var.enable_backup ? 1 : 0
+
+  name        = var.vault_name
+  kms_key_arn = var.kms_key_arn
+  tags        = var.tags
+}
+
+resource "aws_backup_plan" "default" {
+  count = var.enable_backup ? 1 : 0
+
+  name  = "${var.vault_name}-${var.backup_plan_name}"
+  tags  = var.tags
+
+  dynamic "rule" {
+    for_each = var.backup_plan_rules
+    content {
+      rule_name           = rule.value.name
+      target_vault_name   = aws_backup_vault.default[0].name
+      schedule            = rule.value.schedule
+      start_window        = rule.value.start_window
+      completion_window   = rule.value.completion_window
+      recovery_point_tags = var.tags
+
+      dynamic "lifecycle" {
+        for_each = rule.value.delete_after != null ? ["true"] : []
+        content {
+          delete_after = rule.value.delete_after
+        }
+      }
+    }
+  }
+}
+
+data "aws_iam_policy_document" "assume_role" {
+  count = var.enable_backup ? 1 : 0
+
+  statement {
+    effect  = "Allow"
+    actions = ["sts:AssumeRole"]
+
+    principals {
+      type        = "Service"
+      identifiers = ["backup.amazonaws.com"]
+    }
+  }
+}
+
+resource "aws_iam_role" "default" {
+  count = var.enable_backup ? 1 : 0
+
+  name               = "${var.vault_name}-backup-role"
+  assume_role_policy = join("", data.aws_iam_policy_document.assume_role.*.json)
+  tags               = var.tags
+}
+
+resource "aws_iam_role_policy_attachment" "default" {
+  count = var.enable_backup ? 1 : 0
+
+  policy_arn = "arn:aws:iam::aws:policy/service-role/AWSBackupServiceRolePolicyForBackup"
+  role       = join("", aws_iam_role.default.*.name)
+}
+
+resource "aws_backup_selection" "default" {
+  count        = var.enable_backup ? length(var.backup_plan_rules) : 0
+  name         = "${var.vault_name}-selection-${var.backup_plan_rules[count.index].name}"
+  iam_role_arn = join("", aws_iam_role.default.*.arn)
+  plan_id      = aws_backup_plan.default[0].id
+  resources    = var.backup_plan_rules[count.index].resources
+
+  dynamic "selection_tag" {
+    for_each = var.backup_plan_rules[count.index].selection_tag
+    content {
+      type  = selection_tag.value.type
+      key = selection_tag.value.key
+      value  = selection_tag.value.value
+    }
+  }
+}

outputs.tf

+output "backup_vault_id" {
+  value       = join("", aws_backup_vault.default.*.id)
+  description = "Backup Vault ID"
+}
+
+output "backup_vault_arn" {
+  value       = join("", aws_backup_vault.default.*.arn)
+  description = "Backup Vault ARN"
+}
+
+output "backup_vault_recovery_points" {
+  value       = join("", aws_backup_vault.default.*.recovery_points)
+  description = "Backup Vault recovery points"
+}
+
+output "backup_plan_arn" {
+  value       = join("", aws_backup_plan.default.*.arn)
+  description = "Backup Plan ARN"
+}
+
+output "backup_plan_version" {
+  value       = join("", aws_backup_plan.default.*.version)
+  description = "Unique, randomly generated, Unicode, UTF-8 encoded string that serves as the version ID of the backup plan"
+}
+
+output "backup_selection_id" {
+  value       = join("", aws_backup_selection.default.*.id)
+  description = "Backup Selection ID"
+}

provider.tf

+provider "aws" {
+  region = var.region
+}
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variables.tf

+variable "enable_backup" {
+  type        = bool
+  description = "Enable backup true creates all resources associated to this module"
+}
+
+variable "region" {
+  description = "Region where the backups will be configured"
+  type        = string
+  default     = "eu-west-1"
+}
+
+variable "vault_name" {
+  type        = string
+  description = "Solution name, e.g. 'app' or 'cluster'"
+}
+
+variable "tags" {
+  type        = map(string)
+  default     = {}
+  description = "Additional tags (e.g. `map('BusinessUnit`,`XYZ`)"
+}
+
+variable "kms_key_arn" {
+  type        = string
+  description = "The server-side encryption key that is used to protect your backups"
+  default     = null
+}
+
+variable "backup_plan_name" {
+  description = "Plan name"
+  type        = string
+  default     = "d1w_w2w"
+}
+
+variable "backup_plan_rules" {
+  description = "Backups plan to be created and store their backups in the vault"
+  type        = list(object({
+    name              = string
+    resources         = list(string)
+    selection_tag     = list(map(string))
+    schedule          = string
+    start_window      = number
+    completion_window = number
+    delete_after      = number
+  }))
+  default = [{
+    name = "d1w"
+    resources = []
+    selection_tag = []
+    schedule           = "cron(0 21 ? * MON-SAT *)"
+    start_window       = 60
+    completion_window  = 240
+    delete_after       = 6
+  },{
+    name = "w2w"
+    resources = []
+    selection_tag = []
+    schedule           = "cron(0 21 ? * SUN *)"
+    start_window       = 60
+    completion_window  = 240
+    delete_after       = 15
+  }]
+}
\ No newline at end of file

versions.tf

+terraform {
+  required_version = ">= 0.13"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 3.7"
+    }
+    local = {
+      source  = "hashicorp/local"
+    }
+    null = {
+      source = "hashicorp/null"
+    }
+  }
+}