ターゲット追跡スケーリングとスケジュールスケーリングを併用できるのか確認したメモ。
参考リンク
準備
前回の続きとして実施する。サービスが作成され、ターゲット追跡スケーリングが設定された状態。
すなわち、register-scalable-targetとput-scaling-policyは実施済みの状態。
$ aws application-autoscaling describe-scalable-targets --service-namespace ecs --resource-ids service/fargate-cluster/echoserver
{
"ScalableTargets": [
{
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"MinCapacity": 1,
"MaxCapacity": 10,
"RoleARN": "arn:aws:iam::XXXXXXXXXXXX:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService",
"CreationTime": "2020-11-06T10:06:09.967000+09:00",
"SuspendedState": {
"DynamicScalingInSuspended": false,
"DynamicScalingOutSuspended": false,
"ScheduledScalingSuspended": false
}
}
]
}
$ aws application-autoscaling describe-scaling-policies --service-namespace ecs --resource-id service/fargate-cluster/echoserver
{
"ScalingPolicies": [
{
"PolicyARN": "arn:aws:autoscaling:ap-northeast-1:XXXXXXXXXXXX:scalingPolicy:5bb4a23d-5417-4cda-b63f-6d5c439d50da:resource/ecs/service/fargate-cluster/echoserver:policyName/MyMetricTargetTrackingPolicy",
"PolicyName": "MyMetricTargetTrackingPolicy",
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"PolicyType": "TargetTrackingScaling",
"TargetTrackingScalingPolicyConfiguration": {
"TargetValue": 10.0,
"CustomizedMetricSpecification": {
"MetricName": "MyMetricName",
"Namespace": "MyNamespace",
"Dimensions": [
{
"Name": "MyMetricDimensionName",
"Value": "MyMetricDimensionValue"
}
],
"Statistic": "Average"
},
"ScaleOutCooldown": 60,
"ScaleInCooldown": 60,
"DisableScaleIn": false
},
"Alarms": [
{
"AlarmName": "TargetTracking-service/fargate-cluster/echoserver-AlarmHigh-d945ea9e-3722-4428-8633-758ee31546e4",
"AlarmARN": "arn:aws:cloudwatch:ap-northeast-1:XXXXXXXXXXXX:alarm:TargetTracking-service/fargate-cluster/echoserver-AlarmHigh-d945ea9e-3722-4428-8633-758ee31546e4"
},
{
"AlarmName": "TargetTracking-service/fargate-cluster/echoserver-AlarmLow-f864b106-a656-4b20-aebe-01042354cb37",
"AlarmARN": "arn:aws:cloudwatch:ap-northeast-1:XXXXXXXXXXXX:alarm:TargetTracking-service/fargate-cluster/echoserver-AlarmLow-f864b106-a656-4b20-aebe-01042354cb37"
}
],
"CreationTime": "2020-11-06T10:07:59.650000+09:00"
}
]
}
スケジュールスケーリングの設定
スケジュールスケーリングは、スケーリングポリシーとは別に、スケジュールアクションとして作成する。
1回のみのアクションを登録することも、rate式またはcron式を使って定期的なアクションを作成することも可能。
1回のみのアクションとして登録
1回のみのアクションを登録する。
aws application-autoscaling put-scheduled-action \ --service-namespace ecs \ --scalable-dimension ecs:service:DesiredCount \ --resource-id service/fargate-cluster/echoserver \ --scheduled-action-name scale-out \ --schedule "at(2020-11-06T01:30:00)" \ --scalable-target-action MinCapacity=3
登録したアクションを確認する。
$ aws application-autoscaling describe-scheduled-actions --service-namespace ecs --resource-id service/fargate-cluster/echoserver
{
"ScheduledActions": [
{
"ScheduledActionName": "scale-out",
"ScheduledActionARN": "arn:aws:autoscaling:ap-northeast-1:XXXXXXXXXXXX:scheduledAction:5bb4a23d-5417-4cda-b63f-6d5c439d50da:resource/ecs/service/fargate-cluster/echoserver:scheduledActionName/scale-out",
"ServiceNamespace": "ecs",
"Schedule": "at(2020-11-06T01:30:00)",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"ScalableTargetAction": {
"MinCapacity": 3
},
"CreationTime": "2020-11-06T10:27:13.180000+09:00"
}
]
}
時間になると最小数が変更されスケールする。
スケーリングアクティビティを確認できる。最小数が変更される。この場合タスク数が最小数を下回っていたので、その後少し後にDesiredが変更されている。
$ aws application-autoscaling describe-scaling-activities --service-namespace ecs --resource-id service/fargate-cluster/echoserver --max-items 2
{
"ActivityId": "e6796600-390a-4307-b8b4-43ca6c274463",
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"Description": "Setting desired count to 3.",
"Cause": "minimum capacity was set to 3",
"StartTime": "2020-11-06T10:30:40.076000+09:00",
"EndTime": "2020-11-06T10:31:46.790000+09:00",
"StatusCode": "Successful",
"StatusMessage": "Successfully set desired count to 3. Change successfully fulfilled by ecs."
},
{
"ActivityId": "2689954f-cd75-48cf-af1f-9ad877e3413c",
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"Description": "Setting min capacity to 3",
"Cause": "scheduled action name scale-out was triggered",
"StartTime": "2020-11-06T10:30:39.582000+09:00",
"EndTime": "2020-11-06T10:30:39.602000+09:00",
"StatusCode": "Successful",
"StatusMessage": "Successfully set min capacity to 3"
}
定期的なアクションとして登録
定期的なアクションを2つcron式で登録する。毎40分と毎44分にアクションを登録。
aws application-autoscaling put-scheduled-action \ --service-namespace ecs \ --scalable-dimension ecs:service:DesiredCount \ --resource-id service/fargate-cluster/echoserver \ --scheduled-action-name my-recurring-action1 \ --schedule "cron(40 * * * ? *)" \ --scalable-target-action MinCapacity=5,MaxCapacity=20 aws application-autoscaling put-scheduled-action \ --service-namespace ecs \ --scalable-dimension ecs:service:DesiredCount \ --resource-id service/fargate-cluster/echoserver \ --scheduled-action-name my-recurring-action2 \ --schedule "cron(44 * * * ? *)" \ --scalable-target-action MinCapacity=1,MaxCapacity=10
確認する。
$ aws application-autoscaling describe-scheduled-actions --service-namespace ecs --resource-id service/fargate-cluster/echoserver
{
"ScheduledActions": [
{
"ScheduledActionName": "my-recurring-action1",
"ScheduledActionARN": "arn:aws:autoscaling:ap-northeast-1:XXXXXXXXXXXX:scheduledAction:5bb4a23d-5417-4cda-b63f-6d5c439d50da:resource/ecs/service/fargate-cluster/echoserver:scheduledActionName/my-recurring-action1",
"ServiceNamespace": "ecs",
"Schedule": "cron(40 * * * ? *)",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"ScalableTargetAction": {
"MinCapacity": 5,
"MaxCapacity": 20
},
"CreationTime": "2020-11-06T10:39:44.322000+09:00"
},
{
"ScheduledActionName": "scale-out",
"ScheduledActionARN": "arn:aws:autoscaling:ap-northeast-1:XXXXXXXXXXXX:scheduledAction:5bb4a23d-5417-4cda-b63f-6d5c439d50da:resource/ecs/service/fargate-cluster/echoserver:scheduledActionName/scale-out",
"ServiceNamespace": "ecs",
"Schedule": "at(2020-11-06T01:30:00)",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"ScalableTargetAction": {
"MinCapacity": 3
},
"CreationTime": "2020-11-06T10:27:13.180000+09:00"
},
{
"ScheduledActionName": "my-recurring-action2",
"ScheduledActionARN": "arn:aws:autoscaling:ap-northeast-1:XXXXXXXXXXXX:scheduledAction:5bb4a23d-5417-4cda-b63f-6d5c439d50da:resource/ecs/service/fargate-cluster/echoserver:scheduledActionName/my-recurring-action2",
"ServiceNamespace": "ecs",
"Schedule": "cron(44 * * * ? *)",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"ScalableTargetAction": {
"MinCapacity": 1,
"MaxCapacity": 10
},
"CreationTime": "2020-11-06T10:39:45.154000+09:00"
}
]
}
40分に変更される。
44分にまた変更される。
$ aws application-autoscaling describe-scaling-activities --service-namespace ecs --resource-id service/fargate-cluster/echoserver --max-items 3
{
"ScalingActivities": [
{
"ActivityId": "54bf35c4-c4fa-43a8-9f8b-b87dae42c230",
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"Description": "Setting min capacity to 1 and max capacity to 10",
"Cause": "scheduled action name my-recurring-action2 was triggered",
"StartTime": "2020-11-06T10:44:03.493000+09:00",
"EndTime": "2020-11-06T10:44:03.534000+09:00",
"StatusCode": "Successful",
"StatusMessage": "Successfully set min capacity to 1 and max capacity to 10"
},
{
"ActivityId": "bee13543-c633-48f4-b683-8a5fd5780ed2",
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"Description": "Setting desired count to 5.",
"Cause": "minimum capacity was set to 5",
"StartTime": "2020-11-06T10:40:49.312000+09:00",
"EndTime": "2020-11-06T10:41:59.274000+09:00",
"StatusCode": "Successful",
"StatusMessage": "Successfully set desired count to 5. Change successfully fulfilled by ecs."
},
{
"ActivityId": "59fc0ec8-1d66-4c5c-9d45-ab0ed36bcf5e",
"ServiceNamespace": "ecs",
"ResourceId": "service/fargate-cluster/echoserver",
"ScalableDimension": "ecs:service:DesiredCount",
"Description": "Setting min capacity to 5 and max capacity to 20",
"Cause": "scheduled action name my-recurring-action1 was triggered",
"StartTime": "2020-11-06T10:40:48.815000+09:00",
"EndTime": "2020-11-06T10:40:48.840000+09:00",
"StatusCode": "Successful",
"StatusMessage": "Successfully set min capacity to 5 and max capacity to 20"
}
],
"NextToken": "eyJOZXh0VG9rZW4iOiBudWxsLCAiYm90b190cnVuY2F0ZV9hbW91bnQiOiAzfQ=="
}
