For AI agents: A markdown version of this page is available at https://docs.datadoghq.com/security/code_security/iac_security/iac_rules/terraform-azure-small-activity-log-retention-period.md. A documentation index is available at /llms.txt.

Small activity log retention period

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Metadata

Id: terraform-azure-small-activity-log-retention-period

Provider: Azure

Platform: Terraform

Severity: Low

Category: Observability

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Description

This check ensures that the retention_policy.days attribute for the azurerm_monitor_log_profile resource in Terraform is set to 365 days or greater. Insufficient log retention (for example, days = 7 or leaving the value unset) can result in the loss of valuable activity logs, limiting the ability to investigate incidents or meet audit requirements. To address this, configure the retention policy to at least 365 days, as shown below:

retention_policy {
  enabled = true
  days    = 367
}

Compliant Code Examples

resource "azurerm_monitor_log_profile" "negative1" {
  name = "default"

  categories = [
    "Action",
    "Delete",
    "Write",
  ]

  locations = [
    "westus",
    "global",
  ]

  servicebus_rule_id = "${azurerm_eventhub_namespace.example.id}/authorizationrules/RootManageSharedAccessKey"
  storage_account_id = azurerm_storage_account.example.id

  retention_policy {
    enabled = true
    days    = 367
  }
}

resource "azurerm_monitor_log_profile" "negative2" {
  name = "default"

  categories = [
    "Action",
    "Delete",
    "Write",
  ]

  locations = [
    "westus",
    "global",
  ]

  servicebus_rule_id = "${azurerm_eventhub_namespace.example.id}/authorizationrules/RootManageSharedAccessKey"
  storage_account_id = azurerm_storage_account.example.id

  retention_policy {
    enabled = true
    days    = 0
  }
}

Non-Compliant Code Examples

resource "azurerm_monitor_log_profile" "positive1" {
  name = "default"

  categories = [
    "Action",
    "Delete",
    "Write",
  ]

  locations = [
    "westus",
    "global",
  ]

  servicebus_rule_id = "${azurerm_eventhub_namespace.example.id}/authorizationrules/RootManageSharedAccessKey"
  storage_account_id = azurerm_storage_account.example.id

  retention_policy {
    enabled = true
    days    = 7
  }
}

resource "azurerm_monitor_log_profile" "positive2" {
  name = "default"

  categories = [
    "Action",
    "Delete",
    "Write",
  ]

  locations = [
    "westus",
    "global",
  ]

  servicebus_rule_id = "${azurerm_eventhub_namespace.example.id}/authorizationrules/RootManageSharedAccessKey"
  storage_account_id = azurerm_storage_account.example.id

  retention_policy {
    enabled = true
  }
}

resource "azurerm_monitor_log_profile" "positive3" {
  name = "default"

  categories = [
    "Action",
    "Delete",
    "Write",
  ]

  locations = [
    "westus",
    "global",
  ]

  servicebus_rule_id = "${azurerm_eventhub_namespace.example.id}/authorizationrules/RootManageSharedAccessKey"
  storage_account_id = azurerm_storage_account.example.id

  retention_policy {
    enabled = false
  }
}