forked from terraform-aws-modules/terraform-aws-vpc
-
Notifications
You must be signed in to change notification settings - Fork 0
/
vpc-flow-logs.tf
116 lines (87 loc) 路 4.32 KB
/
vpc-flow-logs.tf
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
locals {
# Only create flow log if user selected to create a VPC as well
enable_flow_log = var.create_vpc && var.enable_flow_log
create_flow_log_cloudwatch_iam_role = local.enable_flow_log && var.flow_log_destination_type != "s3" && var.create_flow_log_cloudwatch_iam_role
create_flow_log_cloudwatch_log_group = local.enable_flow_log && var.flow_log_destination_type != "s3" && var.create_flow_log_cloudwatch_log_group
flow_log_destination_arn = local.create_flow_log_cloudwatch_log_group ? try(aws_cloudwatch_log_group.flow_log[0].arn, null) : var.flow_log_destination_arn
flow_log_iam_role_arn = var.flow_log_destination_type != "s3" && local.create_flow_log_cloudwatch_iam_role ? try(aws_iam_role.vpc_flow_log_cloudwatch[0].arn, null) : var.flow_log_cloudwatch_iam_role_arn
flow_log_cloudwatch_log_group_name_suffix = var.flow_log_cloudwatch_log_group_name_suffix == "" ? local.vpc_id : var.flow_log_cloudwatch_log_group_name_suffix
}
################################################################################
# Flow Log
################################################################################
resource "aws_flow_log" "this" {
count = local.enable_flow_log ? 1 : 0
log_destination_type = var.flow_log_destination_type
log_destination = local.flow_log_destination_arn
log_format = var.flow_log_log_format
iam_role_arn = local.flow_log_iam_role_arn
deliver_cross_account_role = var.flow_log_deliver_cross_account_role
traffic_type = var.flow_log_traffic_type
vpc_id = local.vpc_id
max_aggregation_interval = var.flow_log_max_aggregation_interval
dynamic "destination_options" {
for_each = var.flow_log_destination_type == "s3" ? [true] : []
content {
file_format = var.flow_log_file_format
hive_compatible_partitions = var.flow_log_hive_compatible_partitions
per_hour_partition = var.flow_log_per_hour_partition
}
}
tags = merge(var.tags, var.vpc_flow_log_tags)
}
################################################################################
# Flow Log CloudWatch
################################################################################
resource "aws_cloudwatch_log_group" "flow_log" {
count = local.create_flow_log_cloudwatch_log_group ? 1 : 0
name = "${var.flow_log_cloudwatch_log_group_name_prefix}${local.flow_log_cloudwatch_log_group_name_suffix}"
retention_in_days = var.flow_log_cloudwatch_log_group_retention_in_days
kms_key_id = var.flow_log_cloudwatch_log_group_kms_key_id
skip_destroy = var.flow_log_cloudwatch_log_group_skip_destroy
tags = merge(var.tags, var.vpc_flow_log_tags)
}
resource "aws_iam_role" "vpc_flow_log_cloudwatch" {
count = local.create_flow_log_cloudwatch_iam_role ? 1 : 0
name_prefix = "vpc-flow-log-role-"
assume_role_policy = data.aws_iam_policy_document.flow_log_cloudwatch_assume_role[0].json
permissions_boundary = var.vpc_flow_log_permissions_boundary
tags = merge(var.tags, var.vpc_flow_log_tags)
}
data "aws_iam_policy_document" "flow_log_cloudwatch_assume_role" {
count = local.create_flow_log_cloudwatch_iam_role ? 1 : 0
statement {
sid = "AWSVPCFlowLogsAssumeRole"
principals {
type = "Service"
identifiers = ["vpc-flow-logs.amazonaws.com"]
}
effect = "Allow"
actions = ["sts:AssumeRole"]
}
}
resource "aws_iam_role_policy_attachment" "vpc_flow_log_cloudwatch" {
count = local.create_flow_log_cloudwatch_iam_role ? 1 : 0
role = aws_iam_role.vpc_flow_log_cloudwatch[0].name
policy_arn = aws_iam_policy.vpc_flow_log_cloudwatch[0].arn
}
resource "aws_iam_policy" "vpc_flow_log_cloudwatch" {
count = local.create_flow_log_cloudwatch_iam_role ? 1 : 0
name_prefix = "vpc-flow-log-to-cloudwatch-"
policy = data.aws_iam_policy_document.vpc_flow_log_cloudwatch[0].json
tags = merge(var.tags, var.vpc_flow_log_tags)
}
data "aws_iam_policy_document" "vpc_flow_log_cloudwatch" {
count = local.create_flow_log_cloudwatch_iam_role ? 1 : 0
statement {
sid = "AWSVPCFlowLogsPushToCloudWatch"
effect = "Allow"
actions = [
"logs:CreateLogStream",
"logs:PutLogEvents",
"logs:DescribeLogGroups",
"logs:DescribeLogStreams",
]
resources = ["*"]
}
}