CCM-14044 Setting prod defaults (#867)

Co-authored-by: sidnhs <siddharth.nair1@nhs.net>

Author: aidenvaines-cgi

infrastructure/terraform/components/app/README.md

@@ -31,8 +31,12 @@
 | <a name="input_enable_amplify_branch_auto_build"></a> [enable\_amplify\_branch\_auto\_build](#input\_enable\_amplify\_branch\_auto\_build) | Enable automatic building of branches | `bool` | `false` | no |
 | <a name="input_enable_api_data_trace"></a> [enable\_api\_data\_trace](#input\_enable\_api\_data\_trace) | Enable API Gateway data trace logging | `bool` | `false` | no |
 | <a name="input_enable_cognito_built_in_idp"></a> [enable\_cognito\_built\_in\_idp](#input\_enable\_cognito\_built\_in\_idp) | Enable the use of Cognito as an IDP; CIS2 is preferred | `bool` | `false` | no |
+| <a name="input_enable_event_anomaly_detection"></a> [enable\_event\_anomaly\_detection](#input\_enable\_event\_anomaly\_detection) | Enable CloudWatch anomaly detection alarm for SNS message publishing. Detects abnormal drops or spikes in event publishing volume. | `bool` | `true` | no |
 | <a name="input_enable_event_caching"></a> [enable\_event\_caching](#input\_enable\_event\_caching) | Enable caching of events to an S3 bucket | `bool` | `true` | no |
 | <a name="input_environment"></a> [environment](#input\_environment) | The name of the tfscaffold environment | `string` | n/a | yes |
+| <a name="input_event_anomaly_band_width"></a> [event\_anomaly\_band\_width](#input\_event\_anomaly\_band\_width) | The width of the anomaly detection band. Higher values (e.g. 4-6) reduce sensitivity and noise, lower values (e.g. 2-3) increase sensitivity. Recommended: 2-4. | `number` | `5` | no |
+| <a name="input_event_anomaly_evaluation_periods"></a> [event\_anomaly\_evaluation\_periods](#input\_event\_anomaly\_evaluation\_periods) | Number of evaluation periods for the publishing anomaly alarm. Each period is defined by event\_anomaly\_period. | `number` | `3` | no |
+| <a name="input_event_anomaly_period"></a> [event\_anomaly\_period](#input\_event\_anomaly\_period) | The period in seconds over which the specified statistic is applied for anomaly detection. Minimum 300 seconds (5 minutes). Recommended: 300-600. | `number` | `300` | no |
 | <a name="input_event_delivery_logging"></a> [event\_delivery\_logging](#input\_event\_delivery\_logging) | Enable SNS Event Delivery logging | `bool` | `true` | no |
 | <a name="input_event_delivery_logging_success_sample_percentage"></a> [event\_delivery\_logging\_success\_sample\_percentage](#input\_event\_delivery\_logging\_success\_sample\_percentage) | Enable caching of events to an S3 bucket | `number` | `0` | no |
 | <a name="input_external_email_domain"></a> [external\_email\_domain](#input\_external\_email\_domain) | Externally managed domain used to create an SES identity for sending emails from. Validation DNS records will need to be manually configured in the DNS provider. | `string` | `null` | no |
@@ -53,7 +57,7 @@
 | <a name="module_amplify_branch"></a> [amplify\_branch](#module\_amplify\_branch) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/v2.0.20/terraform-amp_branch.zip | n/a |
 | <a name="module_backend_api"></a> [backend\_api](#module\_backend\_api) | ../../modules/backend-api | n/a |
 | <a name="module_download_authorizer_lambda"></a> [download\_authorizer\_lambda](#module\_download\_authorizer\_lambda) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/v2.0.29/terraform-lambda.zip | n/a |
-| <a name="module_eventpub"></a> [eventpub](#module\_eventpub) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.4/terraform-eventpub.zip | n/a |
+| <a name="module_eventpub"></a> [eventpub](#module\_eventpub) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.6/terraform-eventpub.zip | n/a |
 | <a name="module_kms"></a> [kms](#module\_kms) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/v2.0.20/terraform-kms.zip | n/a |
 | <a name="module_kms_us_east_1"></a> [kms\_us\_east\_1](#module\_kms\_us\_east\_1) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/v2.0.20/terraform-kms.zip | n/a |
 | <a name="module_nhse_backup_vault"></a> [nhse\_backup\_vault](#module\_nhse\_backup\_vault) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/v2.0.25/terraform-aws-backup-source.zip | n/a |

infrastructure/terraform/components/app/module_eventpub.tf

@@ -1,6 +1,7 @@
 module "eventpub" {
-  source = "https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.4/terraform-eventpub.zip"
-  name   = "eventpub"
+  source = "https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.6/terraform-eventpub.zip"
+
+  name = "eventpub"
 
   aws_account_id = var.aws_account_id
   component      = var.component
@@ -16,9 +17,14 @@ module "eventpub" {
 
   enable_sns_delivery_logging        = var.event_delivery_logging
   sns_success_logging_sample_percent = var.event_delivery_logging_success_sample_percentage
+  access_logging_bucket              = local.acct.s3_buckets["access_logs"]["id"]
 
   data_plane_bus_arn    = var.data_plane_bus_arn
   control_plane_bus_arn = var.control_plane_bus_arn
 
-  access_logging_bucket = local.acct.s3_buckets["access_logs"]["id"]
+  # CloudWatch Anomaly Detection for publishing
+  enable_event_anomaly_detection   = var.enable_event_anomaly_detection
+  event_anomaly_band_width         = var.event_anomaly_band_width
+  event_anomaly_evaluation_periods = var.event_anomaly_evaluation_periods
+  event_anomaly_period             = var.event_anomaly_period
 }

infrastructure/terraform/components/app/variables.tf

@@ -225,3 +225,27 @@ variable "container_image_tag_suffix" {
   description = "Suffix used for container/image based Lambda image tags"
   default     = "latest"
 }
+
+variable "enable_event_anomaly_detection" {
+  type        = bool
+  description = "Enable CloudWatch anomaly detection alarm for SNS message publishing. Detects abnormal drops or spikes in event publishing volume."
+  default     = true
+}
+
+variable "event_anomaly_evaluation_periods" {
+  type        = number
+  description = "Number of evaluation periods for the publishing anomaly alarm. Each period is defined by event_anomaly_period."
+  default     = 3
+}
+
+variable "event_anomaly_period" {
+  type        = number
+  description = "The period in seconds over which the specified statistic is applied for anomaly detection. Minimum 300 seconds (5 minutes). Recommended: 300-600."
+  default     = 300
+}
+
+variable "event_anomaly_band_width" {
+  type        = number
+  description = "The width of the anomaly detection band. Higher values (e.g. 4-6) reduce sensitivity and noise, lower values (e.g. 2-3) increase sensitivity. Recommended: 2-4."
+  default     = 5
+}

infrastructure/terraform/components/sbx/README.md

@@ -29,7 +29,7 @@
 |------|--------|---------|
 | <a name="module_backend_api"></a> [backend\_api](#module\_backend\_api) | ../../modules/backend-api | n/a |
 | <a name="module_cognito_triggers"></a> [cognito\_triggers](#module\_cognito\_triggers) | ../../modules/cognito-triggers | n/a |
-| <a name="module_eventpub"></a> [eventpub](#module\_eventpub) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.4/terraform-eventpub.zip | n/a |
+| <a name="module_eventpub"></a> [eventpub](#module\_eventpub) | https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.6/terraform-eventpub.zip | n/a |
 ## Outputs
 
 | Name | Description |

infrastructure/terraform/components/sbx/module_eventpub.tf

@@ -1,5 +1,5 @@
 module "eventpub" {
-  source = "https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.4/terraform-eventpub.zip"
+  source = "https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/3.0.6/terraform-eventpub.zip"
 
   name = "eventpub"