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Enforce IAM policy creation #54

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Enforce IAM policy creation #54

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48 changes: 38 additions & 10 deletions main.tf
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Original file line number Diff line number Diff line change
@@ -1,5 +1,18 @@
data "aws_caller_identity" "current" {}

data "aws_region" "current" {}

################################################
#
# Local vars
#
################################################

locals {
aws_lambda_function_regions = var.aws_regions == null ? data.aws_region.current.name : join(", ", var.aws_regions)
ec2_schedule_arn_resources = var.ec2_schedule_arn_resources != null ? join(", ", var.ec2_schedule_arn_resources) : "*"
}

################################################
#
# IAM CONFIGURATION
Expand All @@ -26,7 +39,7 @@ data "aws_iam_policy_document" "this" {
}

resource "aws_iam_role_policy" "autoscaling_group_scheduler" {
count = var.custom_iam_role_arn == null ? 1 : 0
count = var.custom_iam_role_arn == null && var.autoscaling_schedule ? 1 : 0
name = "${var.name}-autoscaling-custom-policy-scheduler"
role = aws_iam_role.this[0].id
policy = data.aws_iam_policy_document.autoscaling_group_scheduler.json
Expand All @@ -53,7 +66,7 @@ data "aws_iam_policy_document" "autoscaling_group_scheduler" {
}

resource "aws_iam_role_policy" "spot_instance_scheduler" {
count = var.custom_iam_role_arn == null ? 1 : 0
count = var.custom_iam_role_arn == null && var.ec2_schedule ? 1 : 0
name = "${var.name}-spot-custom-policy-scheduler"
role = aws_iam_role.this[0].id
policy = data.aws_iam_policy_document.spot_instance_scheduler.json
Expand All @@ -67,34 +80,49 @@ data "aws_iam_policy_document" "spot_instance_scheduler" {
]

resources = [
"*",
"${local.ec2_schedule_arn_resources}",
]
}
}

resource "aws_iam_role_policy" "instance_scheduler" {
count = var.custom_iam_role_arn == null ? 1 : 0
count = var.custom_iam_role_arn == null && var.ec2_schedule ? 1 : 0
name = "${var.name}-ec2-custom-policy-scheduler"
role = aws_iam_role.this[0].id
policy = data.aws_iam_policy_document.instance_scheduler.json
}

data "aws_iam_policy_document" "instance_scheduler" {
statement {
effect = "Allow"
actions = [
"ec2:StopInstances",
"ec2:StartInstances",
"autoscaling:DescribeAutoScalingInstances",
]

resources = [
"*",
]
}
statement {
effect = "Allow"
actions = [
"ec2:StopInstances",
"ec2:StartInstances",
]

resources = [
"${local.ec2_schedule_arn_resources}",
]
condition {
test = "ForAnyValue:StringEquals"
variable = "aws:ResourceTag/${var.scheduler_tag.key}"
values = ["${var.scheduler_tag.value}"]
}
}
}

resource "aws_iam_role_policy" "rds_scheduler" {
count = var.custom_iam_role_arn == null ? 1 : 0
count = var.custom_iam_role_arn == null && var.rds_schedule ? 1 : 0
name = "${var.name}-rds-custom-policy-scheduler"
role = aws_iam_role.this[0].id
policy = data.aws_iam_policy_document.rds_scheduler.json
Expand All @@ -117,7 +145,7 @@ data "aws_iam_policy_document" "rds_scheduler" {
}

resource "aws_iam_role_policy" "ecs_scheduler" {
count = var.custom_iam_role_arn == null ? 1 : 0
count = var.custom_iam_role_arn == null && var.ecs_schedule ? 1 : 0
name = "${var.name}-ecs-custom-policy-scheduler"
role = aws_iam_role.this[0].id
policy = data.aws_iam_policy_document.ecs_scheduler.json
Expand All @@ -137,7 +165,7 @@ data "aws_iam_policy_document" "ecs_scheduler" {
}

resource "aws_iam_role_policy" "redshift_scheduler" {
count = var.custom_iam_role_arn == null ? 1 : 0
count = var.custom_iam_role_arn == null && var.redshift_schedule ? 1 : 0
name = "${var.name}-redshift-custom-policy-scheduler"
role = aws_iam_role.this[0].id
policy = data.aws_iam_policy_document.redshift_scheduler.json
Expand Down Expand Up @@ -270,7 +298,7 @@ resource "aws_lambda_function" "this" {

environment {
variables = {
AWS_REGIONS = var.aws_regions == null ? data.aws_region.current.name : join(", ", var.aws_regions)
AWS_REGIONS = local.aws_lambda_function_regions
SCHEDULE_ACTION = var.schedule_action
TAG_KEY = local.scheduler_tag["key"]
TAG_VALUE = local.scheduler_tag["value"]
Expand Down
6 changes: 6 additions & 0 deletions variables.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,12 @@ variable "ec2_schedule" {
default = false
}

variable "ec2_schedule_arn_resources" {
description = "Instance arn list from ec2 resources"
type = list(string)
default = null
}

variable "documentdb_schedule" {
description = "Enable scheduling on documentdb resources"
type = bool
Expand Down