public async Task ScrapeAsync(MetricDefinition metricDefinition)
{
try
{
if (metricDefinition == null)
{
throw new ArgumentNullException(nameof(metricDefinition));
}
if (!(metricDefinition is TMetricDefinition castedMetricDefinition))
{
throw new ArgumentException($"Could not cast metric definition of type '{metricDefinition.ResourceType}' to {typeof(TMetricDefinition)}. Payload: {JsonConvert.SerializeObject(metricDefinition)}");
}
var aggregationInterval = DetermineMetricAggregationInterval(metricDefinition);
var aggregationType = metricDefinition.AzureMetricConfiguration.Aggregation.Type;
var resourceGroupName = string.IsNullOrEmpty(metricDefinition.ResourceGroupName) ? AzureMetadata.ResourceGroupName : metricDefinition.ResourceGroupName;
var foundMetricValue = await ScrapeResourceAsync(AzureMetadata.SubscriptionId, resourceGroupName, castedMetricDefinition, aggregationType, aggregationInterval);
_logger.LogInformation("Found value '{MetricValue}' for metric '{MetricName}' with aggregation interval '{AggregationInterval}'", foundMetricValue, metricDefinition.Name, aggregationInterval);
var metricsTimestampFeatureFlag = FeatureFlag.IsActive("METRICSTIMESTAMP", defaultFlagState: true);
var gauge = Metrics.CreateGauge(metricDefinition.Name, metricDefinition.Description, includeTimestamp: metricsTimestampFeatureFlag);
gauge.Set(foundMetricValue);
}
catch (Exception exception)
{
_exceptionTracker.Track(exception);
}
}
public void FeatureFlag_FeatureIsNotConfigured_ReturnsOnByDefault()
{
// Act
var flagStatus = FeatureFlag.IsActive("TestFlag");
// Assert
Assert.True(flagStatus);
}
/// <summary>
/// Sets a new value for a measurement on a gauge
/// </summary>
/// <param name="name">Name of the metric</param>
/// <param name="description">Description of the metric</param>
/// <param name="value">New measured value</param>
/// <param name="labels">Labels that are applicable for this measurement</param>
public void SetGaugeMeasurement(string name, string description, double value, Dictionary <string, string> labels)
{
var metricsTimestampFeatureFlag = FeatureFlag.IsActive(FeatureFlag.Names.MetricsTimestamp);
var gauge = Prometheus.Client.Metrics.CreateGauge($"promitor_{name}", help: description, includeTimestamp: metricsTimestampFeatureFlag, labelNames: labels.Keys.ToArray());
gauge.WithLabels(labels.Values.ToArray()).Set(value);
}
public void FeatureFlag_FeatureIsNotConfiguredButDefaultStateIsOff_Returns0ff()
{
// Arrange
const bool defaultFlagState = false;
// Act
var flagStatus = FeatureFlag.IsActive("TestFlag", defaultFlagState: defaultFlagState);
// Assert
Assert.False(flagStatus);
}
public void FeatureFlag_FeatureIsConfiguredToBeOff_ReturnsOff()
{
// Arrange
const bool flagState = false;
Environment.SetEnvironmentVariable("PROMITOR_FEATURE_TestFlag", flagState.ToString());
// Act
var flagStatus = FeatureFlag.IsActive("TestFlag");
// Assert
Assert.False(flagStatus);
}