private (string[] Names, string[] Values) DetermineLabels(PrometheusMetricDefinition metricDefinition, ScrapeResult scrapeResult, MeasuredMetric measuredMetric)
{
var labels = new Dictionary <string, string>(scrapeResult.Labels);
if (measuredMetric.IsDimensional)
{
labels.Add(measuredMetric.DimensionName.ToLower(), measuredMetric.DimensionValue);
}
if (metricDefinition?.Labels?.Any() == true)
{
foreach (var customLabel in metricDefinition.Labels)
{
if (labels.ContainsKey(customLabel.Key))
{
_logger.LogWarning("Custom label {CustomLabelName} was already specified with value 'LabelValue' instead of 'CustomLabelValue'. Ignoring...", customLabel.Key, labels[customLabel.Key], customLabel.Value);
continue;
}
labels.Add(customLabel.Key, customLabel.Value);
}
}
return(labels.Keys.ToArray(), labels.Values.ToArray());
}
private Dictionary <string, string> DetermineLabels(PrometheusMetricDefinition metricDefinition, ScrapeResult scrapeResult, MeasuredMetric measuredMetric)
{
var labels = new Dictionary <string, string>(scrapeResult.Labels.Select(label => new KeyValuePair <string, string>(label.Key.SanitizeForPrometheusLabelKey(), label.Value)));
if (measuredMetric.IsDimensional)
{
labels.Add(measuredMetric.DimensionName.SanitizeForPrometheusLabelKey(), measuredMetric.DimensionValue);
}
if (metricDefinition?.Labels?.Any() == true)
{
foreach (var customLabel in metricDefinition.Labels)
{
var customLabelKey = customLabel.Key.SanitizeForPrometheusLabelKey();
if (labels.ContainsKey(customLabelKey))
{
_logger.LogWarning("Custom label {CustomLabelName} was already specified with value 'LabelValue' instead of 'CustomLabelValue'. Ignoring...", customLabel.Key, labels[customLabelKey], customLabel.Value);
continue;
}
labels.Add(customLabelKey, customLabel.Value);
}
}
return(labels);
}
public void ReportMetric(PrometheusMetricDefinition metricDefinition, ScrapeResult scrapedMetricResult)
{
var enableMetricTimestamps = _prometheusConfiguration.CurrentValue.EnableMetricTimestamps;
var labels = DetermineLabels(metricDefinition, scrapedMetricResult);
var gauge = Metrics.CreateGauge(metricDefinition.Name, metricDefinition.Description, includeTimestamp: enableMetricTimestamps, labelNames: labels.Names);
var metricValue = DetermineMetricMeasurement(scrapedMetricResult);
gauge.WithLabels(labels.Values).Set(metricValue);
}
private Dictionary <string, string> DetermineLabels(PrometheusMetricDefinition metricDefinition, ScrapeResult scrapeResult, MeasuredMetric measuredMetric, Dictionary <string, string> defaultLabels)
{
var labels = new Dictionary <string, string>(scrapeResult.Labels.Select(label => new KeyValuePair <string, string>(label.Key.SanitizeForPrometheusLabelKey(), label.Value)));
if (measuredMetric.IsDimensional)
{
labels.Add(measuredMetric.DimensionName.SanitizeForPrometheusLabelKey(), measuredMetric.DimensionValue);
}
if (metricDefinition?.Labels?.Any() == true)
{
foreach (var customLabel in metricDefinition.Labels)
{
var customLabelKey = customLabel.Key.SanitizeForPrometheusLabelKey();
if (labels.ContainsKey(customLabelKey))
{
_logger.LogWarning("Custom label {CustomLabelName} was already specified with value '{LabelValue}' instead of '{CustomLabelValue}'. Ignoring...", customLabel.Key, labels[customLabelKey], customLabel.Value);
continue;
}
labels.Add(customLabelKey, customLabel.Value);
}
}
foreach (var defaultLabel in defaultLabels)
{
var defaultLabelKey = defaultLabel.Key.SanitizeForPrometheusLabelKey();
if (labels.ContainsKey(defaultLabelKey) == false)
{
labels.Add(defaultLabelKey, defaultLabel.Value);
}
}
// Add the tenant id
var metricsDeclaration = _metricsDeclarationProvider.Get(applyDefaults: true);
if (labels.ContainsKey("tenant_id") == false)
{
labels.Add("tenant_id", metricsDeclaration.AzureMetadata.TenantId);
}
// Transform labels, if need be
if (_prometheusConfiguration.CurrentValue.Labels != null)
{
labels = LabelTransformer.TransformLabels(_prometheusConfiguration.CurrentValue.Labels.Transformation, labels);
}
var orderedLabels = labels.OrderBy(kvp => kvp.Key).ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
return(orderedLabels);
}