/// <summary>
/// <para>Enables reporting of system metrics of the host.</para>
/// <para>Note that provided <see cref="IMetricContext"/> should contain tags sufficient to decouple these metrics from others.</para>
/// </summary>
public static IDisposable ReportMetrics(
[NotNull] this HostMetricsCollector collector,
[NotNull] IMetricContext metricContext,
TimeSpan?period = null)
=> metricContext.CreateMultiFuncGauge(
() => ProvideMetrics(collector),
new FuncGaugeConfig {
ScrapePeriod = period
}) as IDisposable;
private static IEnumerable <MetricDataPoint> ProvideMetrics(HostMetricsCollector collector)
{
var metrics = collector.Collect();
foreach (var property in typeof(HostMetrics).GetProperties())
{
if (property.PropertyType.GetInterface(nameof(IDictionary)) == null)
{
yield return(new MetricDataPoint(
Convert.ToDouble(property.GetValue(metrics)),
(WellKnownTagKeys.Name, property.Name)));
}
}
foreach (var tcpState in metrics.TcpStates.OrEmptyIfNull())
{
yield return(new MetricDataPoint(
Convert.ToDouble(tcpState.Value),
(WellKnownTagKeys.Name, "TcpConnectionCountPerState"),
(nameof(TcpState), tcpState.Key.ToString())
));
}
foreach (var diskSpaceInfo in metrics.DisksSpaceInfo.OrEmptyIfNull())
{
foreach (var property in typeof(DiskSpaceInfo).GetProperties())
{
if (!property.Name.Equals(nameof(DiskSpaceInfo.DiskName)) && !property.Name.Equals(nameof(DiskSpaceInfo.RootDirectory)))
{
yield return(new MetricDataPoint(
Convert.ToDouble(property.GetValue(diskSpaceInfo.Value)),
(WellKnownTagKeys.Name, $"Disk{property.Name}"),
(nameof(DiskSpaceInfo.DiskName), diskSpaceInfo.Value.DiskName)
));
}
}
}
foreach (var diskUsageInfo in metrics.DisksUsageInfo.OrEmptyIfNull())
{
foreach (var property in typeof(DiskUsageInfo).GetProperties())
{
if (!property.Name.Equals(nameof(DiskUsageInfo.DiskName)))
{
yield return(new MetricDataPoint(
Convert.ToDouble(property.GetValue(diskUsageInfo.Value)),
(WellKnownTagKeys.Name, $"Disk{property.Name}"),
(nameof(DiskSpaceInfo.DiskName), diskUsageInfo.Value.DiskName)
));
}
}
}
}