private async Task <List <Alarm> > BuildAlarmsForQueue(
IList <AlarmDefinition> defaults,
ResourceThresholds <SqsResourceConfig> resource,
PopulatedServiceAlarms <SqsResourceConfig, QueueDataV2> service,
AlertingGroupParameters groupParameters,
QueueDataV2 queue)
{
var mergedConfig = service.Options.OverrideWith(resource.Options);
bool includeErrorQueues = mergedConfig.IncludeErrorQueues ?? true;
var result = new List <Alarm>();
var mergedValuesByAlarmName = service.Values.OverrideWith(resource.Values);
foreach (var alarm in defaults)
{
var dimensions = _dimensionProvider.GetDimensions(queue, alarm.DimensionNames);
var values = mergedValuesByAlarmName.GetValueOrDefault(alarm.Name) ?? new AlarmValues();
var actualThreshold = alarm.Threshold.CopyWith(value: values.Threshold);
var threshold = await ThresholdCalculator.ExpandThreshold(_attributeProvider,
queue,
mergedConfig,
actualThreshold);
var built = alarm.CopyWith(threshold, values);
var model = new Alarm
{
AlarmName = $"{resource.Name}-{built.Name}-{groupParameters.AlarmNameSuffix}",
AlarmDescription = groupParameters.DefaultAlarmDescription(resource),
// error queues currently named as per parent queue
ResourceIdentifier = resource.Name,
Dimensions = dimensions,
AlarmDefinition = built
};
result.Add(model);
}
if (includeErrorQueues && queue.ErrorQueue != null)
{
var alarms = await BuildAlarmsForQueue(_errorQueueDefaults, resource, service, groupParameters,
queue.ErrorQueue);
result.AddRange(alarms);
}
return(result);
}
private async Task <List <Alarm> > BuildTableAlarms(ResourceThresholds <DynamoResourceConfig> resourceConfig,
AwsServiceAlarms <DynamoResourceConfig> service,
AlertingGroupParameters groupParameters,
AwsResource <TableDescription> entity)
{
var mergedConfig = service.Options.OverrideWith(resourceConfig.Options);
var result = new List <Alarm>();
var mergedValuesByAlarmName = service.Values.OverrideWith(resourceConfig.Values);
var defaults = _defaultAlarms.DynamoDbRead;
if (mergedConfig.MonitorWrites ?? DynamoResourceConfig.MonitorWritesDefault)
{
defaults = defaults.Concat(_defaultAlarms.DynamoDbWrite).ToArray();
}
foreach (var alarm in defaults)
{
var dimensions = _dimensions.GetDimensions(entity.Resource, alarm.DimensionNames);
var values = mergedValuesByAlarmName.GetValueOrDefault(alarm.Name) ?? new AlarmValues();
var configuredThreshold = alarm.Threshold.CopyWith(value: values.Threshold);
if (mergedConfig.ThresholdIsAbsolute ?? DynamoResourceConfig.ThresholdIsAbsoluteDefault)
{
configuredThreshold.ThresholdType = ThresholdType.Absolute;
}
var threshold = await ThresholdCalculator.ExpandThreshold(_attributeProvider,
entity.Resource,
mergedConfig,
configuredThreshold);
var built = alarm.CopyWith(threshold, values);
var model = new Alarm
{
AlarmName = $"{resourceConfig.Name}-{built.Name}-{groupParameters.AlarmNameSuffix}",
AlarmDescription = groupParameters.DefaultAlarmDescription(),
Resource = entity,
Dimensions = dimensions,
AlarmDefinition = built
};
result.Add(model);
}
return(result);
}
private async Task <IList <Alarm> > CreateAlarmsForResource(
ResourceThresholds <TAlarmConfig> resource,
AwsServiceAlarms <TAlarmConfig> service,
AlertingGroupParameters groupParameters)
{
var entity = await _tableSource.GetResourceAsync(resource.Name);
if (entity == null)
{
throw new Exception($"Entity {resource.Name} not found");
}
var mergedConfig = service.Options.OverrideWith(resource.Options);
var mergedValuesByAlarmName = service.Values.OverrideWith(resource.Values);
var result = new List <Alarm>();
foreach (var alarm in _defaultAlarms)
{
var values = mergedValuesByAlarmName.GetValueOrDefault(alarm.Name) ?? new AlarmValues();
var configuredThreshold = alarm.Threshold.CopyWith(value: values.Threshold);
var dimensions = _dimensions.GetDimensions(entity.Resource, alarm.DimensionNames);
var threshold = await ThresholdCalculator.ExpandThreshold(_attributeProvider,
entity.Resource,
mergedConfig,
configuredThreshold);
var built = alarm.CopyWith(threshold, values);
var model = new Alarm
{
AlarmName = $"{resource.Name}-{built.Name}-{groupParameters.AlarmNameSuffix}",
AlarmDescription = groupParameters.DefaultAlarmDescription(),
Resource = entity,
Dimensions = dimensions,
AlarmDefinition = built
};
result.Add(model);
}
return(result);
}
private async Task <IList <Alarm> > BuildIndexAlarms(ResourceThresholds <DynamoResourceConfig> resourceConfig,
AwsServiceAlarms <DynamoResourceConfig> service,
AlertingGroupParameters groupParameters,
AwsResource <TableDescription> parentTableEntity)
{
// called twice
var mergedConfig = service.Options.OverrideWith(resourceConfig.Options);
var result = new List <Alarm>();
var gsiSet = parentTableEntity.Resource.GlobalSecondaryIndexes;
var mergedValuesByAlarmName = service.Values.OverrideWith(resourceConfig.Values);
var defaults = _defaultAlarms.DynamoDbGsiRead;
if (mergedConfig.MonitorWrites ?? DynamoResourceConfig.MonitorWritesDefault)
{
defaults = defaults.Concat(_defaultAlarms.DynamoDbGsiWrite).ToArray();
}
foreach (var gsi in gsiSet)
{
var gsiResource = new AwsResource <GlobalSecondaryIndexDescription>(gsi.IndexName, gsi);
foreach (var alarm in defaults)
{
var values = mergedValuesByAlarmName.GetValueOrDefault(alarm.Name) ?? new AlarmValues();
var configuredThreshold = alarm.Threshold.CopyWith(value: values.Threshold);
var dimensions = _gsiProvider.GetDimensions(gsi, parentTableEntity.Resource, alarm.DimensionNames);
if (mergedConfig.ThresholdIsAbsolute ?? DynamoResourceConfig.ThresholdIsAbsoluteDefault)
{
configuredThreshold.ThresholdType = ThresholdType.Absolute;
}
var threshold = await ThresholdCalculator.ExpandThreshold(_gsiProvider,
gsiResource.Resource,
mergedConfig,
configuredThreshold);
var built = alarm.CopyWith(threshold, values);
var model = new Alarm
{
AlarmName = $"{resourceConfig.Name}-{gsi.IndexName}-{alarm.Name}-{groupParameters.AlarmNameSuffix}",
AlarmDescription = groupParameters.DefaultAlarmDescription(),
// TODO: remove this property in a future PR
// passing in the entity shouldn't be necessary and passing in the table entity here
// when the alarm is for a GSI is an even worse hack
Resource = parentTableEntity,
Dimensions = dimensions,
AlarmDefinition = built
};
result.Add(model);
}
}
return(result);
}
