private void SaveStatDataToDb(string containerId)
{
string response = _agent.GetResponse(UriResourceName.GetContainerStatsResourceName(containerId));
DockerStatDataModel model = JsonConvert.DeserializeObject <DockerStatDataModel>(response);
Task.Run(() => _dbConnector.AddDataPoint(model)).Wait();
}
// This method was taken from here -
// https://github.com/moby/moby/blob/eb131c5383db8cac633919f82abad86c99bffbe5/cli/command/container/stats_helpers.go#L175
// Useful Link - https://github.com/moby/moby/issues/29306
public static double CalculateCPUPercentWindows(DockerStatDataModel model)
{
long possIntervals = (model.Read - model.Preread).Milliseconds * 1000000;
possIntervals /= 100;
possIntervals *= model.NumProcs;
long intervalsUsed = model.CpuStats.CpuUsage.TotalUsage - model.PrecpuStats.CpuUsage.TotalUsage;
if (possIntervals > 0)
{
return((float)(intervalsUsed) / (float)(possIntervals));
}
return(0.00);
}
public async Task AddDataPoint(DockerStatDataModel model)
{
var valMixed = new InfluxDatapoint <InfluxValueField>();
valMixed.UtcTimestamp = model.Read.UtcDateTime;
valMixed.Tags.Add("ContainerId", model.Id);
valMixed.Tags.Add("ContainerName", model.Name);
valMixed.Fields.Add("CpuPercent", new InfluxValueField(CpuCycleConverter.CalculateCPUPercentWindows(model)));
valMixed.Fields.Add("MemoryUsage", new InfluxValueField(BinaryConverter.ConvertBytesToMegabytes(model.MemoryStats.Privateworkingset)));
valMixed.Fields.Add("DiskInput", new InfluxValueField(BinaryConverter.ConvertBytesToMegabytes(model.StorageStats.WriteSizeBytes)));
valMixed.Fields.Add("DiskOutput", new InfluxValueField(BinaryConverter.ConvertBytesToMegabytes(model.StorageStats.ReadSizeBytes)));
valMixed.MeasurementName = _settings.MeasurementName;
valMixed.Precision = TimePrecision.Seconds;
var r = await _dbClient.PostPointAsync(_settings.DbName, valMixed);
}
