private static void WriteMetric(StreamWriter streamWriter, MetricFamily family, MetricsValue metric)
{
var familyName = family.Name;
if (metric.Gauge != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Gauge.Value, metric.Label);
}
else if (metric.Counter != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Counter.Value, metric.Label);
}
else if (metric.Summary != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Summary.Sample_Sum, metric.Label, "_sum");
WriteSimpleValue(streamWriter, familyName, metric.Summary.Sample_Count, metric.Label, "_count");
foreach (var quantileValuePair in metric.Summary.Quantile)
{
var quantile = double.IsPositiveInfinity(quantileValuePair.QuantileValue) ? "+Inf" : quantileValuePair.QuantileValue.ToString(CultureInfo.InvariantCulture);
WriteSimpleValue(
streamWriter,
familyName,
quantileValuePair.Value,
metric.Label.Concat(new[] { new LabelPair {
Name = "quantile", Value = quantile
} }));
}
}
else if (metric.Histogram != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Histogram.Sample_Sum, metric.Label, "_sum");
WriteSimpleValue(streamWriter, familyName, metric.Histogram.Sample_Count, metric.Label, "_count");
foreach (var bucket in metric.Histogram.Buckets)
{
var value = double.IsPositiveInfinity(bucket.Upper_Bound) ? "+Inf" : bucket.Upper_Bound.ToString(CultureInfo.InvariantCulture);
WriteSimpleValue(
streamWriter,
familyName,
bucket.Cumulative_Count,
metric.Label.Concat(new[] { new LabelPair {
Name = "le", Value = value
} }),
"_bucket");
}
}
else
{
// not supported
}
}
private static void WriteFamily(StreamWriter streamWriter, MetricFamily metricFamily)
{
streamWriter.Write("# HELP ");
streamWriter.Write(metricFamily.Name);
streamWriter.Write(' ');
streamWriter.WriteLine(metricFamily.Help);
streamWriter.Write("# TYPE ");
streamWriter.Write(metricFamily.Name);
streamWriter.Write(' ');
streamWriter.WriteLine(ToString(metricFamily.Type));
foreach (var metric in metricFamily.MetricsValues)
{
WriteMetric(streamWriter, metricFamily, metric);
streamWriter.WriteLine();
}
}
public static IEnumerable <MetricFamily> GetPrometheusMetricsSnapshot(
this MetricsDataValueSource snapshot,
Func <string, string, string> metricNameFormatter)
{
var result = new List <MetricFamily>();
foreach (var group in snapshot.Contexts)
{
foreach (var metricGroup in group.ApdexScores.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
Name = metricNameFormatter(group.Context, metricGroup.Key),
Type = MetricType.GAUGE
};
foreach (var metric in metricGroup)
{
promMetricFamily.MetricsValues.AddRange(metric.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Gauges.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
Name = metricNameFormatter(group.Context, metricGroup.Key),
Type = MetricType.GAUGE
};
foreach (var metric in metricGroup)
{
promMetricFamily.MetricsValues.AddRange(metric.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Counters.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
Name = metricNameFormatter(group.Context, metricGroup.Key),
Type = MetricType.GAUGE
};
foreach (var metric in metricGroup)
{
promMetricFamily.MetricsValues.AddRange(metric.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Meters.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
Name = metricNameFormatter(group.Context, $"{metricGroup.Key}_total"),
Type = MetricType.COUNTER
};
foreach (var metric in metricGroup)
{
promMetricFamily.MetricsValues.AddRange(metric.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Histograms.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
Name = metricNameFormatter(group.Context, metricGroup.Key),
Type = MetricType.SUMMARY
};
foreach (var timer in metricGroup)
{
promMetricFamily.MetricsValues.AddRange(timer.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Timers.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
Name = metricNameFormatter(group.Context, metricGroup.Key),
Type = MetricType.SUMMARY
};
foreach (var timer in metricGroup)
{
promMetricFamily.MetricsValues.AddRange(timer.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
}
return(result);
}
