使用 Cloudwatch API 的实例的 CPU 使用率

Question

如何获取 C# 中实例的 CPU 使用率？ 我已阅读Amazon EC2 - 如何通过 AWS API 获取可用的 ram 和 cpu 使用情况？ 已经有了，但我无法让它工作。

NameValueCollection appConfig = ConfigurationManager.AppSettings;

        var client = AWSClientFactory.CreateAmazonCloudWatchClient(
                appConfig["AWSAccessKey"],
                appConfig["AWSSecretKey"]
                );

        var dimension = new Dimension
            {
                  Name = "InstanceId",
                  Value = "<i-ad20b4db>",
            };

        var request = new GetMetricStatisticsRequest();
        request.MetricName = "CPUUtilization";
        request.Period = 60;
        request.Statistics.Add("Maximum");
        request.Dimensions.Add(dimension);
        request.Namespace = "AWS/EC2";
        request.Unit = "Percent";

        var currentTime = DateTime.UtcNow;
        var startTime = currentTime.AddSeconds(-5);
        string currentTimeString= currentTime.ToString("yyyy-MM-ddTHH:mm:ssZ");
        string startTimeString= startTime.ToString("yyyy-MM-ddTHH:mm:ssZ");

        request.StartTime = Convert.ToDateTime( startTimeString);
        request.EndTime = Convert.ToDateTime(currentTimeString);

        var response = client.GetMetricStatistics(request);

        if ( response.GetMetricStatisticsResult.Datapoints.Count > 0)
            {
                 var dataPoint = response.GetMetricStatisticsResult.Datapoints[0];
                 Console.WriteLine( "Instance: {0} CPU Max load: {1}",  dimension.Value, dataPoint.Maximum);

            }

Answer 1

这是一个简单的概念证明，用于显示过去两天的 CPU 利用率。我认为每半小时就会有一个数据点，但您可以通过更改 GetMetricStatisticsRequest 对象中的 period 属性的值来轻松更改。

AmazonCloudWatch cw = AWSClientFactory.CreateAmazonCloudWatchClient(accessKey, secretKey, new AmazonCloudWatchConfig().WithServiceURL("https://eu-west-1.monitoring.amazonaws.com"));

        DataTable data = new DataTable();
        try
        {
            Dimension dim = new Dimension() { Name = "InstanceId", Value = GetInstanceName(amazonInstance) };
            System.Collections.Generic.List<Dimension> dimensions = new List<Dimension>() { dim };

            string startTime = startTime = DateTimeOffset.Parse(DateTime.Now.AddDays(-2).ToString()).ToUniversalTime().ToString("s"); // "2010-09-29T11:00:00+01:00";

            GetMetricStatisticsRequest reg = new GetMetricStatisticsRequest()
            {
                MeasureName = "CPUUtilization",
                Period = 1800
                Statistics = new System.Collections.Generic.List<string>() { "Average" },
                Dimensions = dimensions,
                Namespace = "AWS/EC2",
                EndTime = DateTime.Now.ToUniversalTime().ToString("s"), //has to be in this format: 2010-09-29T14:00:00+01:00;
                StartTime = startTime
            };

            var points = cw.GetMetricStatistics(reg).GetMetricStatisticsResult.Datapoints.OrderBy(p => p.Timestamp);

            data.Columns.Add("Average");
            data.Columns.Add("TimeStamp");
            foreach (var p in points)
            {
                DataRow row = data.NewRow();
                row["Average"] = Math.Round(p.Average, 0);
                row["TimeStamp"] = DateTimeOffset.Parse(p.Timestamp).LocalDateTime.ToString("yyyy-MM-dd HH:mm");

                data.Rows.Add(row);
            }
        }
    catch (AmazonCloudWatchException ex)
                {
                    if (ex.ErrorCode.Equals("OptInRequired"))
                        throw new Exception("You are not signed in for Amazon EC2.");
                    else
                        throw;
                }

Answer 2

这是我的最终代码，对我有用。
我在 IAM aws 管理控制台中添加了新用户，然后将 CloudWatchfullacess 策略附加到新用户，然后我使用了该用户 Accesskey 和 Accesskey。本代码中的密钥。

var  cw =AWSClientFactory.CreateAmazonCloudWatchClient("AccessKey","secretkey",Amazon.RegionEndpoint.USWest2);

    DataTable data = new DataTable();
    try
    {
        Dimension dim = new Dimension() { Name = "InstanceId", Value = "InstanceId of you EC2 Server" };
        System.Collections.Generic.List<Dimension> dimensions = new List<Dimension>() { dim };

        string  startTime1 = DateTimeOffset.Parse(DateTime.Now.AddMinutes(-60).ToString()).ToUniversalTime().ToString("s");


        GetMetricStatisticsRequest reg = new GetMetricStatisticsRequest()
        {
            MetricName = "CPUUtilization",
            Period = 60,
            Statistics = new System.Collections.Generic.List<string>() { "Average","Minimum","Maximum" },
            Dimensions = dimensions,
            Namespace = "AWS/EC2",
            EndTime = DateTime.Now, //Convert.ToDateTime(DateTime.Now.ToUniversalTime().ToString("s")), //has to be in this format: 2010-09-29T14:00:00+01:00;
            StartTime = DateTime.Now.AddHours(Convert.ToInt32(-15)),// Convert.ToDateTime(startTime1),
        };

        var points = cw.GetMetricStatistics(reg).GetMetricStatisticsResult.Datapoints.OrderBy(p => p.Timestamp);

        data.Columns.Add("Average");
        data.Columns.Add("TimeStamp");
        foreach (var p in points)
        {
            DataRow row = data.NewRow();
            row["Average"] = Math.Round(p.Average, 0);
            row["TimeStamp"] = p.Timestamp; //DateTimeOffset.Parse(Convert.ToDateTime(p.Timestamp)).LocalDateTime.ToString("yyyy-MM-dd HH:mm");
            data.Rows.Add(row);
        }
        dataGridView1.DataSource = data;


    }
    catch (AmazonCloudWatchException ex)
            {
                if (ex.ErrorCode.Equals("OptInRequired"))
                    throw new Exception("You are not signed in for Amazon EC2.");
                else
                    throw;
            }

Answer 3

另请注意，当您想要获取 CPU 使用率或任何其他类型的指标时，您应该警惕请求中包含的时间戳。这是因为数据可能需要超过 48 小时才能在 CloudWatch 中可用（根据 Amazon 的说法）。

这就是为什么我个人尝试检索大约 3-4 天前的数据，因为有时即使请求和代码都正确，CloudWatch 也不会返回任何数据，因为它没有前一两天的任何数据可发布。

有关更多信息，请检查此 URL 并向下滚动到 StartTime：http://docs .aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_GetMetricStatistics.html