AWS Trusted Advisor メトリクスをモニタリングする Amazon CloudWatch アラームを作成する

次の E メールメッセージは、アラームが IAM アクセスキーの更新チェックの変化を検出したことを示します。

You are receiving this email because your Amazon CloudWatch Alarm "IAMAcessKeyRotationCheckAlarm" in the US East (N. Virginia) region has entered the ALARM state, 
because "Threshold Crossed: 1 out of the last 1 datapoints [9.0 (26/03/21 22:44:00)] was greater than or equal to the threshold (1.0) (minimum 1 datapoint for OK -> ALARM transition)." at "Friday 26 March, 2021 22:49:42 UTC".

View this alarm in the AWS マネジメントコンソール:
https://us-east-1.console.aws.amazon.com/cloudwatch/home?region=us-east-1#s=Alarms&alarm=IAMAcessKeyRotationCheckAlarm

Alarm Details:
- Name:                       IAMAcessKeyRotationCheckAlarm
- Description:                This alarm starts when one or more AWS access keys in my AWS account have not been rotated in the last 90 days.
- State Change:               INSUFFICIENT_DATA -> ALARM
- Reason for State Change:    Threshold Crossed: 1 out of the last 1 datapoints [9.0 (26/03/21 22:44:00)] was greater than or equal to the threshold (1.0) (minimum 1 datapoint for OK -> ALARM transition).
- Timestamp:                  Friday 26 March, 2021 22:49:42 UTC
- AWS Account:                123456789012
- Alarm Arn:                  arn:aws:cloudwatch:us-east-1:123456789012:alarm:IAMAcessKeyRotationCheckAlarm

Threshold:
- The alarm is in the ALARM state when the metric is GreaterThanOrEqualToThreshold 1.0 for 300 seconds. 

Monitored Metric:
- MetricNamespace:                     AWS/TrustedAdvisor
- MetricName:                          RedResources
- Dimensions:                          [CheckName = IAM Access Key Rotation]
- Period:                              300 seconds
- Statistic:                           Average
- Unit:                                not specified
- TreatMissingData:                    missing


State Change Actions:
- OK: 
- ALARM: [arn:aws:sns:us-east-1:123456789012:Default_CloudWatch_Alarms_Topic]
- INSUFFICIENT_DATA: 

次の例では、Trusted Advisor のすべてのメトリクスを表示する AWS/TrustedAdvisor 名前空間を指定します。

aws cloudwatch list-metrics --namespace AWS/TrustedAdvisor

出力は次のようになります。

{
    "Metrics": [
        {
            "Namespace": "AWS/TrustedAdvisor", 
            "Dimensions": [
                {
                    "Name": "ServiceName", 
                    "Value": "EBS"
                }, 
                {
                    "Name": "ServiceLimit", 
                    "Value": "Magnetic (standard) volume storage (TiB)"
                }, 
                {
                    "Name": "Region", 
                    "Value": "ap-northeast-2"
                }
            ], 
            "MetricName": "ServiceLimitUsage"
        }, 
        {
            "Namespace": "AWS/TrustedAdvisor", 
            "Dimensions": [
                {
                    "Name": "CheckName", 
                    "Value": "Overutilized Amazon EBS Magnetic Volumes"
                }
            ], 
            "MetricName": "YellowResources"
        }, 
        {
            "Namespace": "AWS/TrustedAdvisor", 
            "Dimensions": [
                {
                    "Name": "ServiceName", 
                    "Value": "EBS"
                }, 
                {
                    "Name": "ServiceLimit", 
                    "Value": "Provisioned IOPS"
                }, 
                {
                    "Name": "Region", 
                    "Value": "eu-west-1"
                }
            ], 
            "MetricName": "ServiceLimitUsage"
        }, 
        {
            "Namespace": "AWS/TrustedAdvisor", 
            "Dimensions": [
                {
                    "Name": "ServiceName", 
                    "Value": "EBS"
                }, 
                {
                    "Name": "ServiceLimit", 
                    "Value": "Provisioned IOPS"
                }, 
                {
                    "Name": "Region", 
                    "Value": "ap-south-1"
                }
            ], 
            "MetricName": "ServiceLimitUsage"
        },
    ...
  ]
}

次の例では、指定した AWS リージョンで使用可能なメトリクスを表示する AWS/TrustedAdvisor 名前空間と Region ディメンションを指定します。

aws cloudwatch list-metrics --namespace AWS/TrustedAdvisor --dimensions Name=Region,Value=us-east-1

出力は次のようになります。

{
    "Metrics": [
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "ServiceName",
                    "Value": "SES"
                },
                {
                    "Name": "ServiceLimit",
                    "Value": "Daily sending quota"
                },
                {
                    "Name": "Region",
                    "Value": "us-east-1"
                }
            ],
            "MetricName": "ServiceLimitUsage"
        },
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "ServiceName",
                    "Value": "AutoScaling"
                },
                {
                    "Name": "ServiceLimit",
                    "Value": "Launch configurations"
                },
                {
                    "Name": "Region",
                    "Value": "us-east-1"
                }
            ],
            "MetricName": "ServiceLimitUsage"
        },
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "ServiceName",
                    "Value": "CloudFormation"
                },
                {
                    "Name": "ServiceLimit",
                    "Value": "Stacks"
                },
                {
                    "Name": "Region",
                    "Value": "us-east-1"
                }
            ],
            "MetricName": "ServiceLimitUsage"
        },
    ...
  ]
}

次の例では、この指定のメトリクスの結果だけを表示する AWS/TrustedAdvisor 名前空間と RedResources メトリクス名を指定します。

aws cloudwatch list-metrics --namespace AWS/TrustedAdvisor --metric-name RedResources

出力は次のようになります。

{
    "Metrics": [
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "CheckName",
                    "Value": "Amazon RDS Security Group Access Risk"
                }
            ],
            "MetricName": "RedResources"
        },
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "CheckName",
                    "Value": "Exposed Access Keys"
                }
            ],
            "MetricName": "RedResources"
        },
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "CheckName",
                    "Value": "Large Number of Rules in an EC2 Security Group"
                }
            ],
            "MetricName": "RedResources"
        },
        {
            "Namespace": "AWS/TrustedAdvisor",
            "Dimensions": [
                {
                    "Name": "CheckName",
                    "Value": "Auto Scaling Group Health Check"
                }
            ],
            "MetricName": "RedResources"
        },
    ...
  ]
}