private static void WriteFamily(StreamWriter streamWriter, MetricFamily metricFamily)
{
streamWriter.WriteLine("# HELP {0} {1}", metricFamily.name, metricFamily.help);
streamWriter.WriteLine("# TYPE {0} {1}", metricFamily.name, metricFamily.type);
foreach (var metric in metricFamily.metric)
{
WriteMetric(streamWriter, metricFamily, metric);
}
}
private static string WriteMetric(MetricFamily family, Metric metric)
{
var s = new StringBuilder();
var familyName = family.name;
if (metric.gauge != null)
{
s.AppendLine(SimpleValue(familyName, metric.gauge.value, metric.label));
}
else if (metric.counter != null)
{
s.AppendLine(SimpleValue(familyName, metric.counter.value, metric.label));
}
else if (metric.summary != null)
{
s.AppendLine(SimpleValue(familyName, metric.summary.sample_sum, metric.label, "_sum"));
s.AppendLine(SimpleValue(familyName, metric.summary.sample_count, metric.label, "_count"));
foreach (var quantileValuePair in metric.summary.quantile)
{
var quantile = double.IsPositiveInfinity(quantileValuePair.quantile)
? "+Inf"
: quantileValuePair.quantile.ToString(CultureInfo.InvariantCulture);
s.AppendLine(
SimpleValue(
familyName,
quantileValuePair.value,
metric.label.Concat(new[] { new LabelPair {
name = "quantile", value = quantile
} })));
}
}
else if (metric.histogram != null)
{
s.AppendLine(SimpleValue(familyName, metric.histogram.sample_sum, metric.label, "_sum"));
s.AppendLine(SimpleValue(familyName, metric.histogram.sample_count, metric.label, "_count"));
foreach (var bucket in metric.histogram.bucket)
{
var value = double.IsPositiveInfinity(bucket.upper_bound) ? "+Inf" : bucket.upper_bound.ToString(CultureInfo.InvariantCulture);
s.AppendLine(
SimpleValue(
familyName,
bucket.cumulative_count,
metric.label.Concat(new[] { new LabelPair {
name = "le", value = value
} }),
"_bucket"));
}
}
else
{
// not supported
}
return(s.ToString());
}
private static string WriteFamily(MetricFamily metricFamily)
{
var s = new StringBuilder();
s.AppendLine(string.Format("# HELP {0} {1}", metricFamily.name, metricFamily.help));
s.AppendLine(string.Format("# TYPE {0} {1}", metricFamily.name, metricFamily.type));
foreach (var metric in metricFamily.metric)
{
s.AppendLine(WriteMetric(metricFamily, metric));
}
return(s.ToString());
}
public static IEnumerable <MetricFamily> GetPrometheusMetricsSnapshot(this MetricsDataValueSource snapshot)
{
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 = FormatName($"{group.Context}_{metricGroup.Key}"),
type = MetricType.GAUGE
};
foreach (var metric in metricGroup)
{
promMetricFamily.metric.AddRange(metric.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Gauges.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
name = FormatName($"{group.Context}_{metricGroup.Key}"),
type = MetricType.GAUGE
};
foreach (var metric in metricGroup)
{
promMetricFamily.metric.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 = FormatName($"{group.Context}_{metricGroup.Key}"),
type = MetricType.GAUGE
};
foreach (var metric in metricGroup)
{
promMetricFamily.metric.AddRange(metric.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Meters.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
name = FormatName($"{group.Context}_{metricGroup.Key}_total"),
type = MetricType.COUNTER
};
foreach (var metric in metricGroup)
{
promMetricFamily.metric.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 = FormatName($"{group.Context}_{metricGroup.Key}"),
type = MetricType.SUMMARY,
};
foreach (var timer in metricGroup)
{
promMetricFamily.metric.AddRange(timer.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
foreach (var metricGroup in group.Timers.GroupBy(
source => source.IsMultidimensional ? source.MultidimensionalName : source.Name))
{
var promMetricFamily = new MetricFamily
{
name = FormatName($"{group.Context}_{metricGroup.Key}"),
type = MetricType.SUMMARY,
};
foreach (var timer in metricGroup)
{
promMetricFamily.metric.AddRange(timer.ToPrometheusMetrics());
}
result.Add(promMetricFamily);
}
}
return(result);
}
