Add warning and critical alarms for callbacks

[whabanks]

Summary | Résumé

This PR adds new alarms to warn when delivery of callbacks have reached the max retry of 5, at least 5 times over a 30 minute period.

Related Issues | Cartes liées

Test instructions | Instructions pour tester la modification

TODO: Fill in test instructions for the reviewer.

Release Instructions | Instructions pour le déploiement

None.

Reviewer checklist | Liste de vérification du réviseur

• This PR does not break existing functionality.
• This PR does not violate GCNotify's privacy policies.
• This PR does not raise new security concerns. Refer to our GC Notify Risk Register document on our Google drive.
• This PR does not significantly alter performance.
• Additional required documentation resulting of these changes is covered (such as the README, setup instructions, a related ADR or the technical documentation).

⚠ If boxes cannot be checked off before merging the PR, they should be moved to the "Release Instructions" section with appropriate steps required to verify before release. For example, changes to celery code may require tests on staging to verify that performance has not been affected.

[github-actions]

Updating alarms ⏰? Great! Please update the Google Sheet and add a 👍 to this message after 🙏

[github-actions]

Updating alarms ⏰? Great! Please update the Google Sheet and add a 👍 to this message after 🙏

[github-actions]

Updating alarms ⏰? Great! Please update the Google Sheet and add a 👍 to this message after 🙏

[github-actions]

Updating alarms ⏰? Great! Please update the Google Sheet and add a 👍 to this message after 🙏

[ben851]

Nice! Please make sure to update the spreadsheet :)

[github-actions]

Staging: eks

✅   Terraform Init: success
✅   Terraform Validate: success
✅   Terraform Format: success
✅   Terraform Plan: success
✅   Conftest: success

Plan: 3 to add, 0 to change, 0 to destroy

Show summary

CHANGE	NAME
add	aws_cloudwatch_log_metric_filter.callback-max-retry-failures[0]
	aws_cloudwatch_metric_alarm.service-callback-too-many-failures-warning[0]
	aws_cloudwatch_query_definition.callback-failures-by-service[0]

Show plan

Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # aws_cloudwatch_log_metric_filter.callback-max-retry-failures[0] will be created
  + resource "aws_cloudwatch_log_metric_filter" "callback-max-retry-failures" {
      + id             = (known after apply)
      + log_group_name = "/aws/containerinsights/notification-canada-ca-staging-eks-cluster/application"
      + name           = "callback-max-retry-failures"
      + pattern        = "Retry: send_delivery_status_to_service has retried the max num of times for callback url"

      + metric_transformation {
          + dimensions = {
              + "notification_id" = "$.notification_id"
              + "service_id"      = "$.service"
              + "url"             = "$.url"
            }
          + name       = "callback-max-retry-failures"
          + namespace  = "LogMetrics"
          + unit       = "None"
          + value      = "1"
        }
    }

  # aws_cloudwatch_metric_alarm.service-callback-too-many-failures-warning[0] will be created
  + resource "aws_cloudwatch_metric_alarm" "service-callback-too-many-failures-warning" {
      + actions_enabled                       = true
      + alarm_actions                         = [
          + "arn:aws:sns:ca-central-1:239043911459:alert-warning",
        ]
      + alarm_description                     = "Service reached the max number of callback retries 5 times in 30 minutes"
      + alarm_name                            = "service-callback-too-many-failures-warning"
      + arn                                   = (known after apply)
      + comparison_operator                   = "GreaterThanOrEqualToThreshold"
      + evaluate_low_sample_count_percentiles = (known after apply)
      + evaluation_periods                    = 1
      + id                                    = (known after apply)
      + metric_name                           = "callback-max-retry-failures"
      + namespace                             = "LogMetrics"
      + period                                = 1800
      + statistic                             = "Sum"
      + tags_all                              = (known after apply)
      + threshold                             = 5
      + treat_missing_data                    = "notBreaching"
    }

  # aws_cloudwatch_query_definition.callback-failures-by-service[0] will be created
  + resource "aws_cloudwatch_query_definition" "callback-failures-by-service" {
      + id                  = (known after apply)
      + log_group_names     = [
          + "/aws/containerinsights/notification-canada-ca-staging-eks-cluster/application",
        ]
      + name                = "Count of callbacks that exceeded MaxRetries by service"
      + query_definition_id = (known after apply)
      + query_string        = <<-EOT
            fields @timestamp, @service_id, @callback_url, @notification_id
            | filter kubernetes.container_name like /^celery/
            | filter @message like /send_delivery_status_to_service has retried the max num of times for callback url/
            | parse @message 'Retry: send_delivery_status_to_service has retried the max num of times for callback url * and notification_id: * for service: *' as @callback_url, @notification_id, @service_id
            | sort @timestamp desc
            | stats count(@service_id) by @service_id, bin(30m)
            | limit 10000
        EOT
    }

Plan: 3 to add, 0 to change, 0 to destroy.

─────────────────────────────────────────────────────────────────────────────

Saved the plan to: plan.tfplan

To perform exactly these actions, run the following command to apply:
    terraform apply "plan.tfplan"

Show Conftest results

WARN - plan.json - main - Cloudwatch log metric pattern is invalid: ["aws_cloudwatch_log_metric_filter.callback-max-retry-failures[0]"]
WARN - plan.json - main - Cloudwatch log metric pattern is invalid: ["aws_cloudwatch_log_metric_filter.celery-error[0]"]
WARN - plan.json - main - Cloudwatch log metric pattern is invalid: ["aws_cloudwatch_log_metric_filter.scanfiles-timeout[0]"]
WARN - plan.json - main - Missing Common Tags: ["aws_acm_certificate.client_vpn"]
WARN - plan.json - main - Missing Common Tags: ["aws_acm_certificate.notification-canada-ca"]
WARN - plan.json - main - Missing Common Tags: ["aws_acm_certificate.notification-canada-ca-alt[0]"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb.notification-canada-ca"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_listener.internal_alb_tls"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_listener.notification-canada-ca"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_target_group.internal_nginx_http"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_target_group.notification-canada-ca-admin"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_target_group.notification-canada-ca-api"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_target_group.notification-canada-ca-document"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_target_group.notification-canada-ca-document-api"]
WARN - plan.json - main - Missing Common Tags: ["aws_alb_target_group.notification-canada-ca-documentation"]
WARN - plan.json - main - Missing Common Tags: ["aws_cloudwatch_log_group.notification-canada-ca-eks-application-logs[0]"]
WARN - plan.json - main - Missing Common Tags: ["aws_cloudwatch_log_group.notification-canada-ca-eks-cluster-logs[0]"]
WARN - plan.json - main - Missing Common Tags: ["aws_cloudwatch_log_group.notification-canada-ca-eks-prometheus-logs[0]"]
WARN - plan.json - main - Missing Common Tags: ["aws_cloudwatch_metric_alarm.admin-evicted-pods[0]"]
WARN...