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MLPAB-1663 - Continuously monitor dependency health checks (#922)
* create dependency health check alarms * create sns topic for service and dependency health checks per environment * create all resources in the global region in order to support checks from multiple regions * choose when to enable actions for health check alarms
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| data "aws_kms_alias" "sns_kms_key_alias_global" { | ||
| name = "alias/${data.aws_default_tags.current.tags.application}_sns_secret_encryption_key" | ||
| provider = aws.global | ||
| } | ||
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| data "aws_iam_role" "sns_success_feedback" { | ||
| name = "SNSSuccessFeedback" | ||
| provider = aws.global | ||
| } | ||
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| data "aws_iam_role" "sns_failure_feedback" { | ||
| name = "SNSFailureFeedback" | ||
| provider = aws.global | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| resource "aws_sns_topic" "service_health_checks_global" { | ||
| name = "${data.aws_default_tags.current.tags.environment-name}-service-health-checks" | ||
| kms_master_key_id = data.aws_kms_alias.sns_kms_key_alias_global.target_key_id | ||
| application_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| application_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| application_success_feedback_sample_rate = 100 | ||
| firehose_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| firehose_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| firehose_success_feedback_sample_rate = 100 | ||
| http_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| http_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| http_success_feedback_sample_rate = 100 | ||
| lambda_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| lambda_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| lambda_success_feedback_sample_rate = 100 | ||
| sqs_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| sqs_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| sqs_success_feedback_sample_rate = 100 | ||
| provider = aws.global | ||
| } | ||
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| resource "aws_route53_health_check" "service_health_check" { | ||
| fqdn = aws_route53_record.app.fqdn | ||
| reference_name = "${substr(data.aws_default_tags.current.tags.environment-name, 0, 20)}-service-hc" | ||
| port = 443 | ||
| type = "HTTPS" | ||
| failure_threshold = 1 | ||
| request_interval = 30 | ||
| resource_path = "/health-check/service" | ||
| measure_latency = true | ||
| regions = ["us-east-1", "eu-west-1", "ap-southeast-1"] | ||
| tags = { | ||
| Name = "${data.aws_default_tags.current.tags.environment-name} service health check" | ||
| } | ||
| provider = aws.global | ||
| } | ||
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| resource "aws_cloudwatch_metric_alarm" "service_health_check" { | ||
| alarm_description = "${data.aws_default_tags.current.tags.environment-name} service health check for" | ||
| alarm_name = "${data.aws_default_tags.current.tags.environment-name}-service-health-check-alarm" | ||
| alarm_actions = [aws_sns_topic.service_health_checks_global.arn] | ||
| ok_actions = [aws_sns_topic.service_health_checks_global.arn] | ||
| actions_enabled = var.service_health_check_alarm_enabled | ||
| comparison_operator = "LessThanThreshold" | ||
| datapoints_to_alarm = 1 | ||
| evaluation_periods = 1 | ||
| metric_name = "HealthCheckStatus" | ||
| namespace = "AWS/Route53" | ||
| period = 60 | ||
| statistic = "Minimum" | ||
| threshold = 1 | ||
| dimensions = { | ||
| HealthCheckId = aws_route53_health_check.service_health_check.id | ||
| } | ||
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| provider = aws.global | ||
| } | ||
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| resource "pagerduty_service_integration" "service_health_check" { | ||
| name = "Modernising LPA ${data.aws_default_tags.current.tags.environment-name} Service Health Check Alarm" | ||
| service = data.pagerduty_service.main.id | ||
| vendor = data.pagerduty_vendor.cloudwatch.id | ||
| } | ||
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| resource "aws_sns_topic_subscription" "service_health_check" { | ||
| topic_arn = aws_sns_topic.service_health_checks_global.arn | ||
| protocol = "https" | ||
| endpoint_auto_confirms = true | ||
| endpoint = "https://events.pagerduty.com/integration/${pagerduty_service_integration.service_health_check.integration_key}/enqueue" | ||
| provider = aws.global | ||
| } | ||
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| resource "aws_sns_topic" "dependency_health_checks_global" { | ||
| name = "${data.aws_default_tags.current.tags.environment-name}-dependency-health-checks" | ||
| kms_master_key_id = data.aws_kms_alias.sns_kms_key_alias_global.target_key_id | ||
| application_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| application_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| application_success_feedback_sample_rate = 100 | ||
| firehose_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| firehose_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| firehose_success_feedback_sample_rate = 100 | ||
| http_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| http_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| http_success_feedback_sample_rate = 100 | ||
| lambda_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| lambda_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| lambda_success_feedback_sample_rate = 100 | ||
| sqs_failure_feedback_role_arn = data.aws_iam_role.sns_failure_feedback.arn | ||
| sqs_success_feedback_role_arn = data.aws_iam_role.sns_success_feedback.arn | ||
| sqs_success_feedback_sample_rate = 100 | ||
| provider = aws.global | ||
| } | ||
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| resource "aws_route53_health_check" "dependency_health_check" { | ||
| fqdn = aws_route53_record.app.fqdn | ||
| reference_name = "${substr(data.aws_default_tags.current.tags.environment-name, 0, 20)}-dependency-hc" | ||
| port = 443 | ||
| type = "HTTPS" | ||
| failure_threshold = 1 | ||
| request_interval = 30 | ||
| resource_path = "/health-check/dependency" | ||
| measure_latency = true | ||
| regions = ["us-east-1", "eu-west-1", "ap-southeast-1"] | ||
| tags = { | ||
| Name = "${data.aws_default_tags.current.tags.environment-name} dependency health check" | ||
| } | ||
| provider = aws.global | ||
| } | ||
|
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| resource "aws_cloudwatch_metric_alarm" "dependency_health_check" { | ||
| alarm_description = "${data.aws_default_tags.current.tags.environment-name} dependency health check for}" | ||
| alarm_name = "${data.aws_default_tags.current.tags.environment-name}-dependency-health-check-alarm" | ||
| alarm_actions = [aws_sns_topic.dependency_health_checks_global.arn] | ||
| ok_actions = [aws_sns_topic.dependency_health_checks_global.arn] | ||
| actions_enabled = var.dependency_health_check_alarm_enabled | ||
| comparison_operator = "LessThanThreshold" | ||
| datapoints_to_alarm = 1 | ||
| evaluation_periods = 1 | ||
| metric_name = "HealthCheckStatus" | ||
| namespace = "AWS/Route53" | ||
| period = 60 | ||
| statistic = "Minimum" | ||
| threshold = 1 | ||
| dimensions = { | ||
| HealthCheckId = aws_route53_health_check.dependency_health_check.id | ||
| } | ||
| provider = aws.global | ||
| } | ||
|
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| resource "pagerduty_service_integration" "dependency_health_check" { | ||
| name = "Modernising LPA ${data.aws_default_tags.current.tags.environment-name} Dependency Health Check Alarm" | ||
| service = data.pagerduty_service.main.id | ||
| vendor = data.pagerduty_vendor.cloudwatch.id | ||
| } | ||
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| resource "aws_sns_topic_subscription" "dependency_health_check" { | ||
| topic_arn = aws_sns_topic.dependency_health_checks_global.arn | ||
| protocol = "https" | ||
| endpoint_auto_confirms = true | ||
| endpoint = "https://events.pagerduty.com/integration/${pagerduty_service_integration.service_health_check.integration_key}/enqueue" | ||
| provider = aws.global | ||
| } |
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