forked from cloudposse/terraform-aws-dynamodb-autoscaler
-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.tf
182 lines (151 loc) · 6.88 KB
/
main.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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
module "default_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.3.3"
namespace = "${var.namespace}"
stage = "${var.stage}"
name = "${var.name}"
delimiter = "${var.delimiter}"
attributes = "${var.attributes}"
tags = "${var.tags}"
enabled = "${var.enabled}"
}
data "aws_iam_policy_document" "assume_role" {
statement {
sid = ""
actions = [
"sts:AssumeRole",
]
principals {
type = "Service"
identifiers = ["application-autoscaling.amazonaws.com"]
}
effect = "Allow"
}
}
resource "aws_iam_role" "autoscaler" {
count = "${var.enabled == "true" ? 1 : 0}"
name = "${module.default_label.id}${var.delimiter}autoscaler"
assume_role_policy = "${data.aws_iam_policy_document.assume_role.json}"
}
data "aws_iam_policy_document" "autoscaler" {
statement {
sid = ""
actions = [
"dynamodb:DescribeTable",
"dynamodb:UpdateTable",
]
resources = ["${var.dynamodb_table_arn}"]
effect = "Allow"
}
}
resource "aws_iam_role_policy" "autoscaler" {
count = "${var.enabled == "true" ? 1 : 0}"
name = "${module.default_label.id}${var.delimiter}autoscaler${var.delimiter}dynamodb"
role = "${join("", aws_iam_role.autoscaler.*.id)}"
policy = "${data.aws_iam_policy_document.autoscaler.json}"
}
data "aws_iam_policy_document" "autoscaler_cloudwatch" {
statement {
sid = ""
actions = [
"cloudwatch:PutMetricAlarm",
"cloudwatch:DescribeAlarms",
"cloudwatch:DeleteAlarms",
]
resources = ["*"]
effect = "Allow"
}
}
resource "aws_iam_role_policy" "autoscaler_cloudwatch" {
count = "${var.enabled == "true" ? 1 : 0}"
name = "${module.default_label.id}${var.delimiter}autoscaler${var.delimiter}cloudwatch"
role = "${join("", aws_iam_role.autoscaler.*.id)}"
policy = "${data.aws_iam_policy_document.autoscaler_cloudwatch.json}"
}
resource "aws_appautoscaling_target" "read_target" {
count = "${var.enabled == "true" ? 1 : 0}"
max_capacity = "${var.autoscale_max_read_capacity}"
min_capacity = "${var.autoscale_min_read_capacity}"
resource_id = "table/${var.dynamodb_table_name}"
scalable_dimension = "dynamodb:table:ReadCapacityUnits"
service_namespace = "dynamodb"
}
resource "aws_appautoscaling_target" "read_target_index" {
count = "${var.enabled == "true" ? length(var.dynamodb_indexes) : 0}"
max_capacity = "${var.autoscale_max_read_capacity}"
min_capacity = "${var.autoscale_min_read_capacity}"
resource_id = "table/${var.dynamodb_table_name}/index/${element(var.dynamodb_indexes, count.index)}"
scalable_dimension = "dynamodb:index:ReadCapacityUnits"
service_namespace = "dynamodb"
}
resource "aws_appautoscaling_policy" "read_policy" {
count = "${var.enabled == "true" ? 1 : 0}"
name = "DynamoDBReadCapacityUtilization:${join("", aws_appautoscaling_target.read_target.*.resource_id)}"
policy_type = "TargetTrackingScaling"
resource_id = "${join("", aws_appautoscaling_target.read_target.*.resource_id)}"
scalable_dimension = "${join("", aws_appautoscaling_target.read_target.*.scalable_dimension)}"
service_namespace = "${join("", aws_appautoscaling_target.read_target.*.service_namespace)}"
target_tracking_scaling_policy_configuration {
predefined_metric_specification {
predefined_metric_type = "DynamoDBReadCapacityUtilization"
}
target_value = "${var.autoscale_read_target}"
}
}
resource "aws_appautoscaling_policy" "read_policy_index" {
count = "${var.enabled == "true" ? length(var.dynamodb_indexes) : 0}"
name = "DynamoDBReadCapacityUtilization:${element(aws_appautoscaling_target.read_target_index.*.resource_id, count.index)}"
policy_type = "TargetTrackingScaling"
resource_id = "${element(aws_appautoscaling_target.read_target_index.*.resource_id, count.index)}"
scalable_dimension = "${element(aws_appautoscaling_target.read_target_index.*.scalable_dimension, count.index)}"
service_namespace = "${element(aws_appautoscaling_target.read_target_index.*.service_namespace, count.index)}"
target_tracking_scaling_policy_configuration {
predefined_metric_specification {
predefined_metric_type = "DynamoDBReadCapacityUtilization"
}
target_value = "${var.autoscale_read_target}"
}
}
resource "aws_appautoscaling_target" "write_target" {
count = "${var.enabled == "true" ? 1 : 0}"
max_capacity = "${var.autoscale_max_write_capacity}"
min_capacity = "${var.autoscale_min_write_capacity}"
resource_id = "table/${var.dynamodb_table_name}"
scalable_dimension = "dynamodb:table:WriteCapacityUnits"
service_namespace = "dynamodb"
}
resource "aws_appautoscaling_target" "write_target_index" {
count = "${var.enabled == "true" ? length(var.dynamodb_indexes) : 0}"
max_capacity = "${var.autoscale_max_write_capacity}"
min_capacity = "${var.autoscale_min_write_capacity}"
resource_id = "table/${var.dynamodb_table_name}/index/${element(var.dynamodb_indexes, count.index)}"
scalable_dimension = "dynamodb:index:WriteCapacityUnits"
service_namespace = "dynamodb"
}
resource "aws_appautoscaling_policy" "write_policy" {
count = "${var.enabled == "true" ? 1 : 0}"
name = "DynamoDBWriteCapacityUtilization:${join("", aws_appautoscaling_target.write_target.*.resource_id)}"
policy_type = "TargetTrackingScaling"
resource_id = "${join("", aws_appautoscaling_target.write_target.*.resource_id)}"
scalable_dimension = "${join("", aws_appautoscaling_target.write_target.*.scalable_dimension)}"
service_namespace = "${join("", aws_appautoscaling_target.write_target.*.service_namespace)}"
target_tracking_scaling_policy_configuration {
predefined_metric_specification {
predefined_metric_type = "DynamoDBWriteCapacityUtilization"
}
target_value = "${var.autoscale_write_target}"
}
}
resource "aws_appautoscaling_policy" "write_policy_index" {
count = "${var.enabled == "true" ? length(var.dynamodb_indexes) : 0}"
name = "DynamoDBWriteCapacityUtilization:${element(aws_appautoscaling_target.write_target_index.*.resource_id, count.index)}"
policy_type = "TargetTrackingScaling"
resource_id = "${element(aws_appautoscaling_target.write_target_index.*.resource_id, count.index)}"
scalable_dimension = "${element(aws_appautoscaling_target.write_target_index.*.scalable_dimension, count.index)}"
service_namespace = "${element(aws_appautoscaling_target.write_target_index.*.service_namespace, count.index)}"
target_tracking_scaling_policy_configuration {
predefined_metric_specification {
predefined_metric_type = "DynamoDBWriteCapacityUtilization"
}
target_value = "${var.autoscale_write_target}"
}
}