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Merge pull request #108 from dxw/conditionally-create-ecs-cluster-pen…
…ding-task-alert Conditionally create ECS Cluster Pending Task Alert
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| resource "aws_cloudwatch_metric_alarm" "infrastructure_ecs_cluster_pending_task" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
|
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| alarm_name = "${local.resource_prefix}-infrastructure-ecs-cluster-infrastructure-pending-task" | ||
| comparison_operator = "GreaterThanOrEqualToThreshold" | ||
| evaluation_periods = local.infrastructure_ecs_cluster_pending_task_alert_evaluation_periods | ||
| metric_name = "PendingTasksCount" | ||
| namespace = "ECS" | ||
| period = local.infrastructure_ecs_cluster_pending_task_alert_period | ||
| statistic = "Maximum" | ||
| threshold = local.infrastructure_ecs_cluster_pending_task_alert_threshold | ||
| alarm_description = "Pending Tasks for ${aws_ecs_cluster.infrastructure[0].name} Cluster" | ||
| actions_enabled = "true" | ||
| alarm_actions = concat( | ||
| local.infrastructure_ecs_cluster_pending_task_alert_slack ? [data.aws_sns_topic.infrastructure_slack_sns_topic[0].arn] : [], | ||
| local.infrastructure_ecs_cluster_pending_task_alert_opsgenie ? [data.aws_sns_topic.infrastructure_opsgenie_sns_topic[0].arn] : [] | ||
| ) | ||
| ok_actions = concat( | ||
| local.infrastructure_ecs_cluster_pending_task_alert_slack ? [data.aws_sns_topic.infrastructure_slack_sns_topic[0].arn] : [], | ||
| local.infrastructure_ecs_cluster_pending_task_alert_opsgenie ? [data.aws_sns_topic.infrastructure_opsgenie_sns_topic[0].arn] : [] | ||
| ) | ||
| dimensions = { | ||
| ClusterName = aws_ecs_cluster.infrastructure[0].name | ||
| } | ||
| } |
164 changes: 164 additions & 0 deletions
164
ecs-cluster-infrastructure-pending-task-metric-lambda.tf
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| resource "aws_cloudwatch_log_group" "ecs_cluster_infrastructure_pending_task_metric_lambda_log_group" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| name = "/aws/lambda/${local.resource_prefix_hash}-ecs-cluster-infrastructure-pending-task-metric" | ||
| kms_key_id = local.infrastructure_kms_encryption ? aws_kms_key.infrastructure[0].arn : null | ||
| retention_in_days = local.infrastructure_ecs_cluster_pending_task_metric_lambda_log_retention | ||
| } | ||
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| resource "aws_iam_role" "ecs_cluster_infrastructure_pending_task_metric_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| name = "${local.resource_prefix}-${substr(sha512("ecs-cluster-infrastructure-pending-task-metric"), 0, 6)}" | ||
| description = "${local.resource_prefix}-ecs-cluster-infrastructure-pending-task-metric" | ||
| assume_role_policy = templatefile( | ||
| "${path.root}/policies/assume-roles/service-principle-standard.json.tpl", | ||
| { services = jsonencode(["lambda.amazonaws.com"]) } | ||
| ) | ||
| } | ||
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| resource "aws_iam_policy" "ecs_cluster_infrastructure_pending_task_metric_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
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| name = "${local.resource_prefix}-ecs-cluster-infrastructure-pending-task-metric" | ||
| policy = templatefile( | ||
| "${path.root}/policies/lambda-default.json.tpl", | ||
| { | ||
| region = local.aws_region | ||
| account_id = local.aws_account_id | ||
| function_name = "${local.resource_prefix_hash}-ecs-cluster-infrastructure-pending-task-metric" | ||
| } | ||
| ) | ||
| } | ||
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| resource "aws_iam_role_policy_attachment" "ecs_cluster_infrastructure_pending_task_metric_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
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| role = aws_iam_role.ecs_cluster_infrastructure_pending_task_metric_lambda[0].name | ||
| policy_arn = aws_iam_policy.ecs_cluster_infrastructure_pending_task_metric_lambda[0].arn | ||
| } | ||
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| resource "aws_iam_policy" "ecs_cluster_infrastructure_pending_task_metric_cloudwatch_put_metric_data_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| name = "${local.resource_prefix}-ecs-cluster-infrastructure-pending-task-metric-cloudwatch-put-metric-data" | ||
| policy = templatefile( | ||
| "${path.root}/policies/cloudwatch-put-metric-data.json.tpl", | ||
| { | ||
| region = local.aws_region | ||
| account_id = local.aws_account_id | ||
| namespaces = ["ECS"] | ||
| } | ||
| ) | ||
| } | ||
|
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| resource "aws_iam_role_policy_attachment" "ecs_cluster_infrastructure_pending_task_cloudwatch_metric_put_metric_data_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
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| role = aws_iam_role.ecs_cluster_infrastructure_pending_task_metric_lambda[0].name | ||
| policy_arn = aws_iam_policy.ecs_cluster_infrastructure_pending_task_metric_cloudwatch_put_metric_data_lambda[0].arn | ||
| } | ||
|
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| resource "aws_iam_policy" "ecs_cluster_infrastructure_pending_task_metric_ecs_describe_cluster_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| name = "${local.resource_prefix}-ecs-cluster-infrastructure-pending-task-metric-ecs-describe-cluster" | ||
| policy = templatefile( | ||
| "${path.root}/policies/ecs-describe-cluster.json.tpl", | ||
| { | ||
| region = local.aws_region | ||
| account_id = local.aws_account_id | ||
| cluster_names = [local.infrastructure_ecs_cluster_name] | ||
| } | ||
| ) | ||
| } | ||
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| resource "aws_iam_role_policy_attachment" "ecs_cluster_infrastructure_pending_task_metric_ecs_describe_cluster_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| role = aws_iam_role.ecs_cluster_infrastructure_pending_task_metric_lambda[0].name | ||
| policy_arn = aws_iam_policy.ecs_cluster_infrastructure_pending_task_metric_ecs_describe_cluster_lambda[0].arn | ||
| } | ||
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| resource "aws_iam_policy" "ecs_cluster_infrastructure_pending_task_metric_kms_encrypt" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert && local.infrastructure_kms_encryption ? 1 : 0 | ||
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| name = "${local.resource_prefix}-ecs-cluster-infrastructure-pending-task-metric-kms-encrypt" | ||
| policy = templatefile( | ||
| "${path.root}/policies/kms-encrypt.json.tpl", | ||
| { kms_key_arn = aws_kms_key.infrastructure[0].arn } | ||
| ) | ||
| } | ||
|
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| resource "aws_iam_role_policy_attachment" "ecs_cluster_infrastructure_pending_task_kms_encrypt" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert && local.infrastructure_kms_encryption ? 1 : 0 | ||
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| role = aws_iam_role.ecs_cluster_infrastructure_pending_task_metric_lambda[0].name | ||
| policy_arn = aws_iam_policy.ecs_cluster_infrastructure_pending_task_metric_kms_encrypt[0].arn | ||
| } | ||
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| data "archive_file" "ecs_cluster_infrastructure_pending_task_metric_lambda" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| type = "zip" | ||
| source_dir = "lambdas/ecs-pending-task-metric" | ||
| output_path = "lambdas/.zip-cache/ecs-pending-task-metric.zip" | ||
| } | ||
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| resource "aws_lambda_function" "ecs_cluster_infrastructure_pending_task_metric" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
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| filename = data.archive_file.ecs_cluster_infrastructure_pending_task_metric_lambda[0].output_path | ||
| function_name = "${local.resource_prefix_hash}-ecs-cluster-infrastructure-pending-task-metric" | ||
| description = "${local.resource_prefix} ECS Cluster Infrastructure Pending Task Metric" | ||
| handler = "function.lambda_handler" | ||
| runtime = "python3.11" | ||
| role = aws_iam_role.ecs_cluster_infrastructure_pending_task_metric_lambda[0].arn | ||
| source_code_hash = data.archive_file.ecs_cluster_infrastructure_pending_task_metric_lambda[0].output_base64sha256 | ||
| memory_size = 128 | ||
| package_type = "Zip" | ||
| timeout = 900 | ||
|
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| environment { | ||
| variables = { | ||
| ecsClusterName = local.infrastructure_ecs_cluster_name | ||
| } | ||
| } | ||
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| tracing_config { | ||
| mode = "Active" | ||
| } | ||
|
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| depends_on = [ | ||
| aws_iam_role_policy_attachment.ecs_cluster_infrastructure_pending_task_metric_lambda, | ||
| aws_iam_role_policy_attachment.ecs_cluster_infrastructure_pending_task_cloudwatch_metric_put_metric_data_lambda, | ||
| aws_iam_role_policy_attachment.ecs_cluster_infrastructure_pending_task_metric_ecs_describe_cluster_lambda, | ||
| aws_iam_role_policy_attachment.ecs_cluster_infrastructure_pending_task_kms_encrypt | ||
| ] | ||
| } | ||
|
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| resource "aws_cloudwatch_event_rule" "ecs_cluster_infrastructure_pending_task_metric_1_min_cron" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
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| name = "${local.resource_prefix_hash}-ecs-cluster-infrastructure-pending-task-metric-1-min" | ||
| description = "Triggers the ${aws_lambda_function.ecs_cluster_infrastructure_pending_task_metric[0].function_name} Lambda every 1 minute" | ||
| schedule_expression = "rate(1 minute)" | ||
| } | ||
|
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| resource "aws_cloudwatch_event_target" "ecs_cluster_infrastructure_pending_task_metric_1_min_cron" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
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| rule = aws_cloudwatch_event_rule.ecs_cluster_infrastructure_pending_task_metric_1_min_cron[0].name | ||
| target_id = "lambda" | ||
| arn = aws_lambda_function.ecs_cluster_infrastructure_pending_task_metric[0].arn | ||
| } | ||
|
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| resource "aws_lambda_permission" "ecs_cluster_infrastructure_pending_task_metric_allow_cloudwatch_execution" { | ||
| count = local.enable_infrastructure_ecs_cluster_pending_task_alert ? 1 : 0 | ||
|
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| statement_id = "AllowExecutionFromCloudWatch" | ||
| action = "lambda:InvokeFunction" | ||
| function_name = aws_lambda_function.ecs_cluster_infrastructure_pending_task_metric[0].function_name | ||
| principal = "events.amazonaws.com" | ||
| source_arn = aws_cloudwatch_event_rule.ecs_cluster_infrastructure_pending_task_metric_1_min_cron[0].arn | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| import boto3 | ||
| import os | ||
|
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||
| CLUSTER_NAME = os.environ['ecsClusterName'] | ||
|
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| def lambda_handler(event, context): | ||
| ecs_client = boto3.client('ecs') | ||
| cloudwatch_client = boto3.client('cloudwatch') | ||
|
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| response = ecs_client.describe_clusters( | ||
| clusters=[CLUSTER_NAME] | ||
| ) | ||
|
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| pending_tasks = response['clusters'][0]['pendingTasksCount'] | ||
|
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| response = cloudwatch_client.put_metric_data( | ||
| Namespace='ECS', | ||
| MetricData=[ | ||
| { | ||
| 'MetricName': 'PendingTasksCount', | ||
| 'Dimensions': [ | ||
| { | ||
| 'Name': 'ClusterName', | ||
| 'Value': CLUSTER_NAME | ||
| }, | ||
| ], | ||
| 'Value': pending_tasks, | ||
| 'Unit': 'Count' | ||
| }, | ||
| ] | ||
| ) | ||
|
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| return { | ||
| 'statusCode': 200, | ||
| 'body': f'Successfully created custom metric for {CLUSTER_NAME} with {pending_tasks} pending tasks' | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Action": [ | ||
| "cloudwatch:PutMetricData" | ||
| ], | ||
| "Effect": "Allow", | ||
| "Resource": "*", | ||
| "Condition": { | ||
| "ForAnyValue:StringEquals": { | ||
| "cloudwatch:namespace": [ | ||
| %{for k, v in namespaces} | ||
| "${v}"%{if k+1 != length(namespaces)},%{endif} | ||
| %{endfor} | ||
| ] | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Action": [ | ||
| "ecs:DescribeClusters" | ||
| ], | ||
| "Effect": "Allow", | ||
| "Resource": [ | ||
| %{for k, v in cluster_names} | ||
| "arn:aws:ecs:${region}:${account_id}:cluster/${v}"%{if k+1 != length(cluster_names)},%{endif} | ||
| %{endfor} | ||
| ] | ||
| } | ||
| ] | ||
| } |
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