Question

如何在c＃中获取实例的CPU使用率？我已经阅读了Amazon EC2 - how to get available ram and cpu usage via AWS API?，但我无法正常工作。

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。我认为每半小时会有一个数据点，但您可以通过更改GetMetricStatisticsRequest对象中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，然后我将新的用户附加CloudWatchfullacess策略，然后我使用了这个用户Accesskey＆amp;本守则中的密钥。

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

请注意，当您想获得CPU使用率或任何其他类型的指标时，您应该警惕您在请求中包含的时间戳。这是因为在CloudWatch中可以使用超过48小时的数据（根据亚马逊）。

这就是为什么我个人尝试从大约3-4天前检索数据，因为有时CloudWatch不会返回任何数据，即使请求和代码都是正确的，因为它没有任何数据要从前一天发布或两个。

有关详情，请查看此网址并向下滚动至StartTime：http://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_GetMetricStatistics.html

使用Cloudwatch API的实例的CPU使用情况

3 个答案: