ADD dax module

README.md

@@ -12,6 +12,7 @@ This repo list some open to use Terraform modules we use at `Peak AI` because we
 - [:camera: ECR](/ecr)
 - [☸ K8S_IRSA](/k8s_irsa)
 - [:open_file_folder: S3](/s3)
+- [:oil_drum: Dax](/dax)
 - [:bookmark: Tags (aka Labels)](/tags)
 
 ## Example usage

dax/README.md

@@ -0,0 +1,61 @@
+## Requirements
+
+No requirements.
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| aws | >= 2.62 |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| item\_cache\_ttl\_milli\_second | Time after which item cache will invalidate. Default 5 minutes | `number` | `300000` | no |
+| name | n/a | `string` | n/a | yes |
+| node\_type | (Required) The compute and memory capacity of the nodes | `string` | `"dax.t2.small"` | no |
+| query\_cache\_ttl\_\_milli\_second | Time after which item query will invalidate. Default 5 minutes | `number` | `300000` | no |
+| region | n/a | `string` | n/a | yes |
+| replication\_factor | (Required) The number of nodes in the DAX cluster | `number` | `3` | no |
+| tables | List of tables for using dax | `list(string)` | n/a | yes |
+| tags | A map of tags to assign to the resource | `any` | n/a | yes |
+| vpc\_id | n/a | `string` | n/a | yes |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| endpoint\_created | Endpoint of the created cluster. |
+
+## Example usage
+
+```hcl
+provider "aws" {
+    version = "~> 2.62"
+}
+
+module "tags" {
+    source  = "git::https://github.com/peak-ai/terraform-modules.git//tags?ref=v0.7.0"
+    tenant  = "new-client"
+    stage   = "latest"
+    feature = "example"
+    service = "example"
+}
+
+module "my_dax" {
+  source                        = "git::https://github.com/peak-ai/terraform-modules.git//dax?ref=v0.7.0"
+  name                          = "dax"
+  tags                          = module.tags.default
+  region                        = "example_region"
+  vpc_id                        = "example_vpc_id"
+  node_type                     = "dax.t2.small"
+  replication_factor            = 3
+  query_cache_ttl__milli_second = 30 * 1000
+  item_cache_ttl_milli_second   = 30 * 60 * 1000
+  tables = [
+    "table1",
+    "table2"
+  ]
+}
+```

dax/main.tf

@@ -0,0 +1,102 @@
+provider "aws" {
+  region = var.region
+  default_tags {
+    tags = var.tags
+  }
+}
+
+data "aws_caller_identity" "current" {}
+resource "aws_iam_role" "role" {
+  name = "${var.name}-dax"
+
+  assume_role_policy = <<EOF
+{
+    "Version": "2012-10-17",
+    "Statement": [
+        {
+            "Effect": "Allow",
+            "Principal": {
+                "Service": "dax.amazonaws.com"
+            },
+            "Action": "sts:AssumeRole"
+        }
+    ]
+}
+EOF
+}
+
+data "aws_subnet_ids" "vpc_subnets" {
+  vpc_id = var.vpc_id
+  tags = {
+    Network = "Private"
+  }
+}
+
+locals {
+  table_arns = [for table in var.tables : [
+    "arn:aws:dynamodb:${var.region}:${data.aws_caller_identity.current.account_id}:table/${table}",
+    "arn:aws:dynamodb:${var.region}:${data.aws_caller_identity.current.account_id}:table/${table}/*"
+  ]]
+}
+
+
+data "aws_iam_policy_document" "document" {
+  statement {
+    effect = "Allow"
+    actions = [
+      "dynamodb:DescribeTable",
+      "dynamodb:PutItem",
+      "dynamodb:GetItem",
+      "dynamodb:UpdateItem",
+      "dynamodb:DeleteItem",
+      "dynamodb:Query",
+      "dynamodb:Scan",
+      "dynamodb:BatchGetItem",
+      "dynamodb:BatchWriteItem",
+      "dynamodb:ConditionCheckItem"
+    ]
+    resources = flatten(local.table_arns)
+  }
+}
+
+resource "aws_iam_policy" "policy" {
+  name        = "${var.name}-dax"
+  description = "Dax access policy for cluster ${var.name}"
+
+  policy = data.aws_iam_policy_document.document.json
+}
+
+resource "aws_iam_role_policy_attachment" "policy_attachment" {
+  role       = aws_iam_role.role.name
+  policy_arn = aws_iam_policy.policy.arn
+}
+
+resource "aws_dax_parameter_group" "group" {
+  name = var.name
+
+  parameters {
+    name  = "query-ttl-millis"
+    value = var.query_cache_ttl__milli_second
+  }
+
+  parameters {
+    name  = "record-ttl-millis"
+    value = var.item_cache_ttl_milli_second
+  }
+}
+resource "aws_dax_subnet_group" "subnet_group" {
+  name       = var.name
+  subnet_ids = data.aws_subnet_ids.vpc_subnets.ids
+}
+
+resource "aws_dax_cluster" "cluster" {
+  cluster_name         = var.name
+  iam_role_arn         = aws_iam_role.role.arn
+  node_type            = var.node_type
+  replication_factor   = var.replication_factor
+  parameter_group_name = aws_dax_parameter_group.group.name
+  subnet_group_name    = aws_dax_subnet_group.subnet_group.id
+  server_side_encryption {
+    enabled = true
+  }
+}

dax/outputs.tf

@@ -0,0 +1,4 @@
+output "endpoint_created" {
+  value       = aws_dax_cluster.cluster.cluster_address
+  description = "Endpoint of the DaX cluster."
+}

dax/variables.tf

@@ -0,0 +1,42 @@
+variable "tags" {}
+
+variable "region" {
+  type = string
+}
+
+variable "name" {
+  type = string
+}
+
+variable "node_type" {
+  type        = string
+  default     = "dax.t2.small"
+  description = "(Required) The compute and memory capacity of the nodes"
+}
+
+variable "replication_factor" {
+  type        = number
+  default     = 3
+  description = "(Required) The number of nodes in the DAX cluster"
+}
+
+variable "vpc_id" {
+  type = string
+}
+
+variable "tables" {
+  type        = list(string)
+  description = "List of tables for using dax"
+}
+
+variable "item_cache_ttl_milli_second" {
+  type        = number
+  default     = 300000
+  description = "Time after which item cache will invalidate. Default 5 minutes"
+}
+
+variable "query_cache_ttl__milli_second" {
+  type        = number
+  default     = 300000
+  description = "Time after which query cache will invalidate. Default 5 minutes"
+}