Azure Storage Account Terraform Module

Terraform Module to create an Azure storage account with a set of containers (and access level), set of file shares (and quota), tables, queues, Network policies and Blob lifecycle management.

To defines the kind of account, set the argument to account_kind = "StorageV2". Account kind defaults to StorageV2. If you want to change this value to other storage accounts kind, then this module automatically computes the appropriate values for account_tier, account_replication_type. The valid options are BlobStorage, BlockBlobStorage, FileStorage, Storage and StorageV2. static_website can only be set when the account_kind is set to StorageV2.

[!NOTE] This module now supports the meta arguments including providers, depends_on, count, and for_each.

resources are supported

• Storage Account
• Storage Advanced Threat Protection
• Containers
• SMB File Shares
• Storage Table
• Storage Queue
• Network Policies
• Azure Blob storage lifecycle
• Managed Service Identity

Module Usage

# Azure Provider configuration
provider "azurerm" {
  features {}
}

resource "azurerm_user_assigned_identity" "example" {
  for_each            = toset(["user-identity1", "user-identity2"])
  resource_group_name = "rg-shared-westeurope-01"
  location            = "westeurope"
  name                = each.key
}

module "storage" {
  source  = "kumarvna/storage/azurerm"
  version = "2.5.0"

  # By default, this module will not create a resource group
  # proivde a name to use an existing resource group, specify the existing resource group name, 
  # and set the argument to `create_resource_group = false`. Location will be same as existing RG. 
  create_resource_group = true
  resource_group_name   = "rg-demo-internal-shared-westeurope-002"
  location              = "westeurope"
  storage_account_name  = "mystorage"

  # To enable advanced threat protection set argument to `true`
  enable_advanced_threat_protection = true

  # Container lists with access_type to create
  containers_list = [
    { name = "mystore250", access_type = "private" },
    { name = "blobstore251", access_type = "blob" },
    { name = "containter252", access_type = "container" }
  ]

  # SMB file share with quota (GB) to create
  file_shares = [
    { name = "smbfileshare1", quota = 50 },
    { name = "smbfileshare2", quota = 50 }
  ]

  # Storage tables
  tables = ["table1", "table2", "table3"]

  # Storage queues
  queues = ["queue1", "queue2"]

  # Configure managed identities to access Azure Storage (Optional)
  # Possible types are `SystemAssigned`, `UserAssigned` and `SystemAssigned, UserAssigned`.
  managed_identity_type = "UserAssigned"
  managed_identity_ids  = [for k in azurerm_user_assigned_identity.example : k.id]

  # Lifecycle management for storage account.
  # Must specify the value to each argument and default is `0` 
  lifecycles = [
    {
      prefix_match               = ["mystore250/folder_path"]
      tier_to_cool_after_days    = 0
      tier_to_archive_after_days = 50
      delete_after_days          = 100
      snapshot_delete_after_days = 30
    },
    {
      prefix_match               = ["blobstore251/another_path"]
      tier_to_cool_after_days    = 0
      tier_to_archive_after_days = 30
      delete_after_days          = 75
      snapshot_delete_after_days = 30
    }
  ]

  # Adding TAG's to your Azure resources (Required)
  # ProjectName and Env are already declared above, to use them here, create a varible. 
  tags = {
    ProjectName  = "demo-internal"
    Env          = "dev"
    Owner        = "[email protected]"
    BusinessUnit = "CORP"
    ServiceClass = "Gold"
  }
}

Resource Group

By default, this module will not create a resource group and the name of an existing resource group to be given in an argument resource_group_name. If you want to create a new resource group, set the argument create_resource_group = true.

Note

If you are using an existing resource group, then this module uses the same resource group location to create all resources in this module.

BlockBlobStorage accounts

A BlockBlobStorage account is a specialized storage account in the premium performance tier for storing unstructured object data as block blobs or append blobs. Compared with general-purpose v2 and BlobStorage accounts, BlockBlobStorage accounts provide low, consistent latency and higher transaction rates.

BlockBlobStorage accounts don't currently support tiering to hot, cool, or archive access tiers. This type of storage account does not support page blobs, tables, or queues.

To create BlockBlobStorage accounts, set the argument to account_kind = "BlockBlobStorage".

FileStorage accounts

A FileStorage account is a specialized storage account used to store and create premium file shares. This storage account kind supports files but not block blobs, append blobs, page blobs, tables, or queues.

FileStorage accounts offer unique performance dedicated characteristics such as IOPS bursting. For more information on these characteristics, see the File share storage tiers section of the Files planning guide.

To create BlockBlobStorage accounts, set the argument to account_kind = "FileStorage".

Containers

A container organizes a set of blobs, similar to a directory in a file system. A storage account can include an unlimited number of containers, and a container can store an unlimited number of blobs. The container name must be lowercase.

This module creates the containers based on your input within an Azure Storage Account. Configure the access_type for this Container as per your preference. Possible values are blob, container or private. Preferred Defaults to private.

SMB File Shares

Azure Files offers fully managed file shares in the cloud that are accessible via the industry standard Server Message Block (SMB) protocol. Azure file shares can be mounted concurrently by cloud or on-premises deployments of Windows, Linux, and macOS.

This module creates the SMB file shares based on your input within an Azure Storage Account. Configure the quota for this file share as per your preference. The maximum size of the share, in gigabytes. For Standard storage accounts, this must be greater than 0 and less than 5120 GB (5 TB). For Premium FileStorage storage accounts, this must be greater than 100 GB and less than 102400 GB (100 TB).

Soft delete for Blobs or Containers

Soft delete protects blob data from being accidentally or erroneously modified or deleted. When soft delete is enabled for a storage account, containers, blobs, blob versions, and snapshots in that storage account may be recovered after they are deleted, within a retention period that you specify.

This module allows you to specify the number of days that the blob or container should be retained period using blob_soft_delete_retention_days and container_soft_delete_retention_days arguments between 1 and 365 days. Default is 7 days.

Warning

Container soft delete can restore only whole containers and their contents at the time of deletion. You cannot restore a deleted blob within a container by using container soft delete. Microsoft recommends also enabling blob soft delete and blob versioning to protect individual blobs in a container.

When you restore a container, you must restore it to its original name. If the original name has been used to create a new container, then you will not be able to restore the soft-deleted container.

Configure Azure Storage firewalls and virtual networks

The Azure storage firewall provides access control access for the public endpoints of the storage account. Use network policies to block all access through the public endpoint when using private endpoints. The storage firewall configuration also enables select trusted Azure platform services to access the storage account securely.

The default action set to Allow when no network rules matched. A subnet_ids or ip_rules can be added to network_rules block to allow a request that is not Azure Services.

module "storage" {
  source  = "kumarvna/storage/azurerm"
  version = "2.5.0"

  # .... omitted

  # If specifying network_rules, one of either `ip_rules` or `subnet_ids` must be specified
  network_rules = {
    bypass     = ["AzureServices"]
    # One or more IP Addresses, or CIDR Blocks to access this Key Vault.
    ip_rules   = ["123.201.18.148"]
    # One or more Subnet ID's to access this Key Vault.
    subnet_ids = []
  }

  # .... omitted
  }

Manage the Azure Blob storage lifecycle

Azure Blob storage lifecycle management offers a rich, rule-based policy for General Purpose v2 (GPv2) accounts, Blob storage accounts, and Premium Block Blob storage accounts. Use the policy to transition your data to the appropriate access tiers or expire at the end of the data's lifecycle.

The lifecycle management policy lets you:

• Transition blobs to a cooler storage tier (hot to cool, hot to archive, or cool to archive) to optimize for performance and cost
• Delete blobs at the end of their lifecycles
• Define rules to be run once per day at the storage account level
• Apply rules to containers or a subset of blobs*

This module supports the implementation of storage lifecycle management. If specifying network_rules, one of either ip_rules or subnet_ids must be specified and default_action must be set to Deny.

module "storage" {
  source  = "kumarvna/storage/azurerm"
  version = "2.5.0"

  # .... omitted

  # Lifecycle management for storage account.
  # Must specify the value to each argument and default is `0`
  lifecycles = [
    {
      prefix_match               = ["mystore250/folder_path"]
      tier_to_cool_after_days    = 0
      tier_to_archive_after_days = 50
      delete_after_days          = 100
      snapshot_delete_after_days = 30
    },
    {
      prefix_match               = ["blobstore251/another_path"]
      tier_to_cool_after_days    = 0
      tier_to_archive_after_days = 30
      delete_after_days          = 75
      snapshot_delete_after_days = 30
    }
  ]

  # .... omitted
  }

Identity - Configure managed identities to access Azure Storage

Managed identities for Azure resources provides Azure services with an automatically managed identity in Azure Active Directory. You can use this identity to authenticate to any service that supports Azure AD authentication, without having credentials in your code.

There are two types of managed identities:

• System-assigned: When enabled a system-assigned managed identity an identity is created in Azure AD that is tied to the lifecycle of that service instance. when the resource is deleted, Azure automatically deletes the identity. By design, only that Azure resource can use this identity to request tokens from Azure AD.
• User-assigned: A managed identity as a standalone Azure resource. For User-assigned managed identities, the identity is managed separately from the resources that use it.

Regardless of the type of identity chosen a managed identity is a service principal of a special type that may only be used with Azure resources. When the managed identity is deleted, the corresponding service principal is automatically removed.

resource "azurerm_user_assigned_identity" "example" {
  for_each            = toset(["user-identity1", "user-identity2"])
  resource_group_name = "rg-shared-westeurope-01"
  location            = "westeurope"
  name                = each.key
}

module "storage" {
  source  = "kumarvna/storage/azurerm"
  version = "2.5.0"

  # .... omitted

  # Configure managed identities to access Azure Storage (Optional)
  # Possible types are `SystemAssigned`, `UserAssigned` and `SystemAssigned, UserAssigned`.
  managed_identity_type = "UserAssigned"
  managed_identity_ids  = [for k in azurerm_user_assigned_identity.example : k.id]

# .... omitted for bravity

}

Recommended naming and tagging conventions

Applying tags to your Azure resources, resource groups, and subscriptions to logically organize them into a taxonomy. Each tag consists of a name and a value pair. For example, you can apply the name Environment and the value Production to all the resources in production. For recommendations on how to implement a tagging strategy, see Resource naming and tagging decision guide.

Important

Tag names are case-insensitive for operations. A tag with a tag name, regardless of the casing, is updated or retrieved. However, the resource provider might keep the casing you provide for the tag name. You'll see that casing in cost reports. Tag values are case-sensitive.

An effective naming convention assembles resource names by using important resource information as parts of a resource's name. For example, using these recommended naming conventions, a public IP resource for a production SharePoint workload is named like this: pip-sharepoint-prod-westus-001.

Requirements

Name	Version
terraform	>= 1.1.0
azurerm	>= 3.1.0

Providers

Name	Version
azurerm	>= 3.1.0
random	>= 3.1.0

Inputs

Name	Description	Type	Default
create_resource_group	Whether to create resource group and use it for all networking resources	string	false
resource_group_name	The name of the resource group in which resources are created	string	""
location	The location of the resource group in which resources are created	string	""
account_kind	General-purpose v2 accounts: Basic storage account type for blobs, files, queues, and tables.	string	"StorageV2"
skuname	The SKUs supported by Microsoft Azure Storage. Valid options are Premium_LRS, Premium_ZRS, Standard_GRS, Standard_GZRS, Standard_LRS, Standard_RAGRS, Standard_RAGZRS, Standard_ZRS	string	Standard_RAGRS
access_tier	Defines the access tier for BlobStorage and StorageV2 accounts. Valid options are Hot and Cool.	string	"Hot"
min_tls_version	The minimum supported TLS version for the storage account. Possible values are TLS1_0, TLS1_1, and TLS1_2	string	"TLS1_2"
blob_soft_delete_retention_days	Specifies the number of days that the blob should be retained, between 1 and 365 days.	number	7
container_soft_delete_retention_days	Specifies the number of days that the blob should be retained, between 1 and 365 days.	number	7
enable_versioning	Is versioning enabled?	string	false
last_access_time_enabled	Is the last access time based tracking enabled?	string	false
change_feed_enabled	Is the blob service properties for change feed events enabled?	string	false
enable_advanced_threat_protection	Controls Advance threat protection plan for Storage account!string	false
managed_identity_type	The type of Managed Identity which should be assigned to the Azure Storage. Possible values are SystemAssigned, UserAssigned and SystemAssigned, UserAssigned	string	null
managed_identity_ids	A list of User Managed Identity ID's which should be assigned to the Azure Storage.	string	null
network_rules	Configure Azure storage firewalls and virtual networks	list	null
containers_list	List of container	list	[]
file_shares	List of SMB file shares	list	[]
queues	List of storages queues	list	[]
tables	List of storage tables	list	[]
lifecycles	Configure Azure Storage firewalls and virtual networks	list	{}
Tags	A map of tags to add to all resources	map	{}

Container objects (must have keys)

Name	Description	Type	Default
name	Name of the container	string	""
access_type	The Access Level configured for the Container. Possible values are blob, container or private.	string	"private"

SMB file Shares objects (must have keys)

Name	Description	Type	Default
name	Name of the SMB file share	string	""
quota	The required size in GB. Defaults to 5120	string	""

network_rules objects (must have keys)

Name	Description	Type	Default
bypass	Specifies whether traffic is bypassed for Logging/Metrics/AzureServices. Valid options are any combination of Logging, Metrics, AzureServices, or None.	string	"AzureServices"
ip_rules	List of public IP or IP ranges in CIDR Format. Only IPV4 addresses are allowed. Private IP address ranges are not allowed.	list(string)	[]
subnet_ids	A list of resource ids for subnets.	list(string)	[]

lifecycles objects (must have keys)

Name	Description	Type	Default
prefix_match	An array of strings for prefixes to be matched	set(string)	[]
tier_to_cool_after_days	The age in days after last modification to tier blobs to cool storage. Supports blob currently at Hot tier. Must be at least 0.	number	0
tier_to_archive_after_days	The age in days after last modification to tier blobs to archive storage. Supports blob currently at Hot or Cool tier. Must be at least 0.	number	0
delete_after_days	The age in days after last modification to delete the blob. Must be at least 0.	number	0
snapshot_delete_after_days	The age in days after create to delete the snapshot. Must be at least 0.	number	0

Outputs

Name	Description
resource_group_name	The name of the resource group in which resources are created
resource_group_id	The id of the resource group in which resources are created
resource_group_location	The location of the resource group in which resources are created
storage_account_id	The ID of the storage account
sorage_account_name	The name of the storage account
storage_account_primary_location	The primary location of the storage account
storage_account_primary_blob_endpoint	The endpoint URL for blob storage in the primary location
storage_account_primary_web_endpoint	The endpoint URL for web storage in the primary location
storage_account_primary_web_host	The hostname with port if applicable for web storage in the primary location
storage_primary_connection_string	The primary connection string for the storage account
storage_primary_access_key	The primary access key for the storage account
storage_secondary_access_key	The secondary access key for the storage account
containers	The list of containers
file_shares	The list of SMB file shares
tables	The list of storage tables
queues	The list of storage queues

Resource Graph

Authors

Originally created by Kumaraswamy Vithanala

Other resources

• Azure Storage documentation
• Terraform AzureRM Provider Documentation