Module to enable DML lifecycle policies

modules/dlm-lifecycle-policy/README.md

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+## Data Lifecycle Manager (DLM) lifecycle policy for managing snapshots
+
+This module creates an IAM role and a policy that manage the creation of EBS snapshots, Data Lifecycle Manager policy let you create snapshots according to the schedule that you choose.
+
+### Example how to use
+
+Define the module in your terraform project:
+```
+variable "ebs_name" {
+  description = "EBS name/tag to query"
+  default     = "myebstagname"
+}
+
+Define variables
+...
+
+module "ebs-backup-policy" {
+  source = "git::https://github.com/fpco/terraform-aws-foundation//modules/dlm-lifecycle-policy"
+
+  ebs_name                      = "${var.ebs_name_for_backup}"
+  dml_description               = "${var.dml_description}"
+  schedule_name                 = "${var.schedule_name}"
+  schedule_interval             = "${var.schedule_interval}"
+  schedule_interval_times       = "${var.schedule_interval_times}"
+  schedule_interval_retain_rule = "${var.schedule_interval_retain_rule}"
+}
+```

modules/dlm-lifecycle-policy/iam.tf

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+# Create the iam role
+resource "aws_iam_role" "dlm_lifecycle_role" {
+  name = "dlm-lifecycle-role"
+
+  assume_role_policy = <<EOF
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Action": "sts:AssumeRole",
+      "Principal": {
+        "Service": "dlm.amazonaws.com"
+      },
+      "Effect": "Allow",
+      "Sid": ""
+    }
+  ]
+}
+EOF
+}
+
+# DLM lifecycle Policy
+resource "aws_iam_role_policy" "dlm_lifecycle" {
+  name = "dlm-lifecycle-policy"
+  role = "${aws_iam_role.dlm_lifecycle_role.id}"
+
+  policy = <<EOF
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Action": [
+        "ec2:CreateSnapshot",
+        "ec2:DeleteSnapshot",
+        "ec2:DescribeVolumes",
+        "ec2:DescribeSnapshots"
+      ],
+      "Resource": "*"
+    },
+    {
+      "Effect": "Allow",
+      "Action": [
+        "ec2:CreateTags"
+      ],
+      "Resource": "arn:aws:ec2:*::snapshot/*"
+    }
+  ]
+}
+EOF
+}

modules/dlm-lifecycle-policy/main.tf

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+/**
+* ## Data Lifecycle Manager (DLM) lifecycle policy for managing snapshots
+*
+* The purpose of this module is to provide a policy to create snapshots accourding an schudule.
+* This module creates an IAM role and a policy that manage the creation of EBS snapshots, Data Lifecycle Manager policy let you create snapshots according to the schedule that you choose.
+*
+* The module supports:
+*
+* * Generate snapshots of volumes attached to ec2 instances
+* * Assume the IAM Role policy to manage DLM lifecycle policy
+*
+*/
+
+# Filter for the EBS volume that will apply the policy
+data "aws_ebs_volume" "ebs" {
+  most_recent = true
+
+  filter {
+    name   = "volume-type"
+    values = "${var.ebs_type}"
+  }
+
+  filter {
+    name   = "tag:Name"
+    values = ["${var.ebs_name}"]
+  }
+}
+
+# DLM lifecycle schedule
+resource "aws_dlm_lifecycle_policy" "gitlab-ebs-lifecycle-policy" {
+  description        = "${var.dml_description}"
+  execution_role_arn = "${aws_iam_role.dlm_lifecycle_role.arn}"
+  state              = "ENABLED"
+
+  policy_details {
+    resource_types = "${var.dml_resource_type}"
+
+    schedule {
+      name = "${var.schedule_name}"
+
+      create_rule {
+        interval      = "${var.schedule_interval}"
+        interval_unit = "${var.schedule_interval_unit}"
+        times         = "${var.schedule_times}"
+      }
+
+      retain_rule {
+        count = "${var.schedule_retain_rule}"
+      }
+
+      tags_to_add = {
+        SnapshotCreator = "DLM"
+      }
+
+      copy_tags = "${var.schedule_copy_tags}"
+    }
+
+    target_tags = {
+      Snapshot = "${var.schedule_target_tags}"
+    }
+  }
+}
+
+#resource "aws_ebs_snapshot" "ebs-snapshot" {
+#  volume_id = "${data.aws_ebs_volume.ebs.id}"
+#
+#  tags = {
+#    Name = "${var.ebs_name}-ebs"
+#  }
+#}

modules/dlm-lifecycle-policy/variables.tf

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+variable "ebs_name" {
+  description = "EBS name/tag to query"
+  default     = ""
+}
+
+variable "ebs_type" {
+  description = "EBS type to query"
+  type        = "list"
+  default     = ["gp2"]
+}
+
+variable "dml_description" {
+  description = "DLM lifecycle policy description"
+  default     = "DLM lifecycle policy"
+}
+
+variable "dml_resource_type" {
+  description = "DLM resource type"
+  default     = ["VOLUME"]
+}
+
+variable "schedule_name" {
+  description = "Snapshots schedule name"
+  default     = "One week of daily snapshots"
+}
+
+
+variable "schedule_interval" {
+  description = "Snapshots schedule interval"
+  default     = 24
+}
+
+variable "schedule_interval_unit" {
+  description = "Snapshots schedule interval unit"
+  default     = "HOURS"
+}
+
+variable "schedule_times" {
+  description = "Snapshots schedule time"
+  type        = "list"
+  default     = ["23:45"]
+}
+
+variable "schedule_retain_rule" {
+  description = "Snapshots schedule interval times"
+  default     = 14
+}
+
+variable "schedule_copy_tags" {
+  description = "Copy all user-defined tags on a source volume to snapshots of the volume created by this policy."
+  default     = false
+}
+
+variable "schedule_target_tags" {
+  description = "A mapping of tag keys and their values. Any resources that match the resource_types and are tagged with any of these tags will be targeted."
+  default     = "true"
+}