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AWS EC2 の CPU 使用率を取得する方法(Ruby)

Last updated at Posted at 2021-04-29
Gemfile
gem 'aws-sdk-cloudwatch'

特定インスタンスの CPU 使用率(最大値)を1日分取得する例

metric = Aws::CloudWatch::Metric.new(
  'AWS/EC2',
  'CPUUtilization',
  region: region, # 例: 'ap-northeast-1'
  credentials: Aws::Credentials.new(
    access_key_id,
    secret_access_key
  )
)

result = metric.get_statistics(
  start_time: Time.now.beginning_of_day,
  end_time: Time.now,
  statistics: ['Maximum'], # SampleCount, Average, Sum, Minimum, Maximum を指定可能です
  period: 60 * 60 * 24,    # 1 day
  dimensions: [{ name: 'InstanceId', value: instance_id }] # EC2 instance の Instance ID
)

result
=>
#<struct Aws::CloudWatch::Types::GetMetricStatisticsOutput
  label='CPUUtilization',
  datapoints=[
    #<struct Aws::CloudWatch::Types::Datapoint
      timestamp=2021-04-28 15:00:00 UTC,
      sample_count=nil,
      average=nil,
      sum=nil,
      minimum=nil,
      maximum=24.0,
      unit='Percent',
      extended_statistics={}
    >
  ]
>

参照

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